US The turnout outfit, which consists of a protective coat and pants, is a requirement for firefighters, as well as other personal protective equipment (PPE) such a helmet, gloves, boots, and a self-contained breathing apparatus.
They should correctly wear an SCBA until it is considered safe to remove it in order to prevent exposures to hazardous chemicals through inhalation and skin absorption. Following an emergency reaction, a process known as secondary decontamination, firefighters are still at risk of inhaling dangerous substances. Protective clothing with a support function (meets NFPA 1993) air-purifying, canister-equipped, full-facepiece respirator. Safety boots and gloves that can withstand chemicals. Self-contained breathing apparatuses (SCBA) are essential for firefighters because they shield them from hazardous heat and poisonous smoke. The safety of the nation's firefighters quickly improved as a result of NIST research that contributed to strengthening industry standards for SCBA performance.
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TRUE/FALSE. in complex piping systems, it is desirable to use double-line multiview drawings drawn accurately to scale.
TRUE. It is preferable to utilize double-line multiview drawings that are appropriately scaled for complex plumbing systems.
What are the purposes of multiview drawings?An multiview painting is one that depicts two or more perspectives of a three-dimensional subject in two dimensions.Drawings with many perspectives show an object's shape.Multiview drawings are the primary means of communication among designers and manufacturers when used in conjunction with dimensions.
What procedure is followed in creating a multiview drawing?Multiview or graphical drawings can be made using parallel projection techniques.This front multiview design was made using orthographic projection, which involves projecting specifics onto a plane parallel to the viewpoint of the object that was chosen as the front.
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Impulse and momentum experiment when you used different elastic materials, what changes occurred in the shapes of the graph? is there a correlation between material and shape?
The change in momentum of the object is equal to the impulse it experiences. F • t = m • v is an equation. When two objects collide, they both experience an impulse, which both causes and is equal to the change in momentum.
How does impulse cause a change in an object's momentum?The impulse-momentum theorem predicts that an object's applied impulse will be equal to its changed momentum. As of late, we can clearly discern the impulse-momentum theorem.
What can we infer about collisions and explosions from the impulse-momentum change theorem?In a collision, an object is subjected to a force for a predetermined period of time, changing the velocity of its mass. The impulse-momentum change theorem is what is used to prove this.
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what is the recommended composition of a search team (based on the guidelines by Clark and Diliberto in 1996)?
The Clark and Diliberto Search Team Clark and Diliberto refer to the investigators dispatched to the computer crime scene as the "Computer Search Warrant .
what is recommended composition?
A good composition is one that has just enough detail. Too few elements is bad because it robs the work of art of necessary detail that makes correct interpretation possible. It also ruins the balance of an image. And too many elements can be very distracting as well. Good composition requires good balance.A good composition is one in which every visual element has a precise role and adds something to the story. For a good composition, photography needs a balance between the elements in the frame. It means you have to balance the amount of detail and space, highlights and shadows, etc.Composition is another word for writing — the act of writing or the piece of writing that results. It also refers to what something is made of. The word composition comes from the Latin componere, meaning "put together" and its meaning remains close to this.To learn more about composition refers to:
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The "Computer Search Warrant" is the name given by Clark and Diliberto to the team of investigators who were sent to the computer crime scene.
What kind of writing is suggested?A good composition has just the right amount of detail. A work of art that has too few elements is bad because it lacks the necessary detail for correct interpretation. Additionally, it throws off an image's balance. Additionally, having too many elements can be very distracting. Good balance is necessary for good composition.
Every visual element in a good composition plays a specific role and contributes to the story. Photography requires a balance between the elements in the frame for a good composition. It means that you need to strike a balance between space and detail, highlights and shadows, etc.
The act of writing or the piece of writing that results is referred to as composition. Additionally, it refers to the material of something. The word "composition" comes from the Latin word "componere," which means "to put together," and its meaning is still very similar to that.
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start access. open the support ac financial services database from the data files. (if you did not previously complete the exercise, see your instructor for a copy of the modified database.)
A computer system can be accessed in one of three ways: Direct access, sequential indexing, and sequential access
How can I search a database in Access for data?Click Find in the Find group under the Home tab. The Find tab is chosen, and the Find and Replace dialogue box displays. Enter the value you wish to search for in the Find What box. Click the relevant link in the Look In list to alter the search field you wish to use or to search the full underlying table.A computer system can be accessed in one of three ways: Direct access, sequential indexing, and sequential access. It is the simplest method of access. One record at a time, the information in the data file is processed in sequence.To learn more about data files refer to:
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Based on your research, identify security controls that could be implemented in the Workstation, LAN, LAN-to-WAN, WAN, Remote Access, and System/Application Domains. Recommend and explain one security control for each domain. Be sure to cite your sources.
User domain, Workstation domain, LAN, LAN-to-WAN, Remote Access domain, WAN domain, and System/Application domain are a few of them. If defences are absent or fall short, attackers will see each of these domains as entry points.
For many enterprises, the LAN-to-WAN domain designates their connection to the Internet. There is a big risk associated with this link. The configuration of devices in LAN-to-WAN security standards is frequently centred on preserving message and transaction integrity. The following dangers might be present in this area: Only a basic modem is installed; there is no firewall. absence of any perimeter defences. inadequate intrusion detection and prevention. The organization's local area network (LAN) infrastructure is referred to as the LAN domain. A LAN enables the connection of two or more computers in a constrained physical space. The compact area might be a house, an office, or a collection of structures.
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architectural drawings that describe the layout and construction of a house are referred to as what...?
Architectural drawings that describe the layout and construction of a house are referred to as blueprints. The traditional name used to describe construction drawings. Civil plans. Drawings that show the location of the building on the side from aerial view, including contours, trees, construction features, and dimensions.
By signing on the mailing list for NCAS, one can keep getting the information vulnerabilities, incidents, mitigation from US GovernmentUS-CERT ONIST CISCO
The purpose of mailing US-CERT Reason ---> CERT Alert is to notify owners and operators of critical infrastructure of threats.
What is the purpose of US CERT?US-CERT is in charge of analyzing and reducing cyber threats and vulnerabilities, disseminating information about cyber threat warnings, and coordinating activities related to incident response. US-CERT collaborates with state and local governments, international organizations, the private sector, the research community, and federal agencies.
How do cert notifications work?The purpose of an ICS-CERT Alert is to promptly notify owners and operators of critical infrastructure of threats or activities that have the potential to affect computing networks of critical infrastructure.
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select the correct term to complete the sentence. switches are devices used to connect networks, like connecting lans to wans.
The little hardware component known as a network switch connects many computers to one local area network (LAN). Switches are not capable of sharing an Internet connection or connecting to several networks.
What is local area network?A local area network is a type of computer network that connects computers in an area that is relatively small, like a home, school, lab, university campus, or office building. On the other hand, a wide area network often makes use of leased telecommunications circuits and covers a larger geographic area. A local area network (LAN) is a network made up of several computers that are connected in one location.Through TCP/IP ethernet or Wi-Fi, the computers in a LAN are linked to one another. An organisation, whether a school, office, association, or church, typically has its own LAN. Local area network is what it means.To learn more about local area network, refer to:
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Consider the following code segment, which is intended to print the maximum value in an integer array values. Assume that the array has been initialized properly and that it contains at least one element.
int maximum = /* missing initial value */;
for (int k = 1; k < values.length; k++)
{
if (values[k] > maximum)
{
maximum = values[k];
}
}
System.out.println(maximum);
Which of the following should replace /* missing initial value */ so that the code segment will work as intended? A
values[0]
B
values[1]
C
Integer.MIN_VALUE
D
Integer.MAX_VALUE
E
Answer:
B: values[0]
Explanation:
(From CollegeBoard)
The code segment compares each integer in the array after the first to maximum. If an integer is the maximum integer found so far, maximum is assigned that integer. By initializing maximum to values[0], the first element in the array will be the maximum integer found so far. Any subsequent integer will be compared to the maximum integer found so far, and the code segment will work as intended.
Basically, if you set the maximum value to the first item in the array, it will compare it against the rest of the values in the array. During this process, if there is a higher number in the array, it will replace the maximum until reaching the end of the array.
(Also answer A is just 0 for anyone wondering)
you can ping a computer to which you're trying to transfer files via ftp, but you can't communicate by using ftp.
7- Application Layer.
What OSI layer are FTP and SMTP located in?
The File Transfer (FTP), Website Domain Service (DNS), File Transfer Protocol (HTTP), and Simple Mail Transmission Protocol are just a few of the many application-layer protocols that are well-known to average Internet users (SMTP).
FTP, SMTP, and SMTP are what?The acronyms for HTTP, FTP, and SMTP stand for Hypertext Transfer Protocol ( http, File Transfer Protocol, and Simple Mail Transfer Protocol, respectively.All three are essential components of the modern internet and are used to transmit data via computer networks.
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Layer of Application can ping a computer to which you're trying to transfer files via ftp.
Which OSI layer contain FTP and SMTP?A few of the numerous application-layer protocols that are well-known to common Internet users include the File Transfer Protocol (FTP), Website Domain Service (DNS), File Transfer Protocol (HTTP), and Simple Mail Transmission Protocol (SMTP).
What are FTP, SMTP, and SMTP?Hypertext Transfer Protocol (http), File Transfer Protocol (FTP), and Simple Mail Transfer Protocol (SMTP), respectively, are the acronyms for these protocols. The transmission of data over computer networks is made possible by all three of these essential components of the contemporary internet.
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how do spies use constructive and destructive interference of waves?
When two waves cross each other in a way that it combine to form a larger wave, this is known as constructive interference.When waves overlap in a way that they cancel one another out, destructive interference results.
What practical applications of destructive interference exist?Destructive interference is a technique used by engineers and scientists to lower levels of background noise and sound.The contemporary electronic automobile muffler is one illustration of this.The sound produced by this gadget, which senses the sound traveling down the exhaust pipe, has the opposite phase to the original sound.
How do waves become beneficial or harmful?Backwashes from destructive waves are more powerful than swashes.Erosion results from the powerful backwash pulling soil away from the beach and into the water.Contrarily, constructive waves are low intensity waves that cause material to accumulate along the shoreline.
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Which of the following Belt Levels usually require a Six Sigma Project be completed before a Six Sigma Certification is awarded?A . White BeltB . Yellow BeltC . Green BeltD . Black BeltE . Master Black BeltF . None of the AboveG . All of the above
Prior to receiving a Six Sigma Certification, Belt Levels typically require the completion of a Six Sigma Project.
Is a project required for Six Sigma Black Belt?Examine the various roles, belts, and levels of Six Sigma. Note: To earn your Six Sigma Black Belt certification, you must complete at least one project and submit an affidavit for that project.
I should acquire which Six Sigma Belt first?Green Belt: serves as a fundamental introduction to Lean Six Sigma for novices. Belt Green: Intermediate program that teaches you how to work on company-wide process improvement projects. Brown Belt: Program of advanced training for project team management.
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Isolated grounding circuits and receptacles are installed in an effort to reduce electrical noise that can interfere with data systems and equipment.
TrueFalse
It is true that isolated grounding circuits and receptacles are installed to cut down on electrical noise, which can damage equipment and data systems.
How does a ground receptacle that is isolated reduce electrical noise?A ground screw and yokes are present in an isolated ground receptacle, but the yokes are electrically isolated from the ground screw. As a result, the receptacle body and ground screw can be utilized for two distinct ground paths. The receptacle slots are shielded from any noise emanating from the metal raceway by this separation.
How is an isolated ground receptacle put in?A grounded metal wallbox is required to house isolated ground receptacles. Attach the metal wallbox's ground wire made of bare copper, if any is present. Connect the wallbox's insulated Isolated Ground wire to the GFCI's GREEN wire lead.
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Instantaneous power output of a single phase 60 Hz generator is constant under following condition(s); a. The load draws only real power b. The load draws only reactive power c. The load draws both real and reactive power d. The load is balanced e. None of the above
The power used in a DC circuit is calculated by multiplying the DC voltage by the DC current, expressed in watts. However, we must determine the power consumed in a different way for AC circuits containing reactive components.
Since electrical power is the "rate" at which energy is expended in a circuit, every electrical and electronic component and device has a safe operating range for electrical power. a 20-watt amplifier or a 1/4-watt resistor, for instance. Both DC and AC quantities of electrical power are capable of time variation. Instantaneous power, which is determined by the well-known relationship, is the amount of power in a circuit at any given moment.
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Piping within a hydronic heating system carries
A. Freon.
B. refrigerant.
C. conditioned air.
D. hot water.
Answer:
D. hot water.
Explanation:
technician a says gasoline and kerosene are typical cleaning agents used to clean hands of grease and other automotive chemicals. technician b says your hands are very porous and easily absorb solvents on contact. who is correct?
Technician B is correct who says that hands are very porous and can easily absorb solvents such as gasoline and kerosene so they should be avoid cleaning hands.
Solvents such as gasoline and kerosene may be used by workers to clean their skin or hands following contact with oily materials. However, this practice is not recommended, because it is well known that these solvents will defat the skin. So technician B is correct to state that hands are very porous and can easily absorb solvents so avoid using these solvents to clean hands.
In the contrast, technician A is not correct to say that kerosene and gasoline are typical cleaning agents to be used to clean hands of grease and other automotive chemicals.
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assume that a two-dimensional (2d) array arr of string objects with 3 rows and 4 columns has been properly declared and initialized. which of the following can be used to print the elements in the four corner elements of arr ? group of answer choices system.out.print(arr[0, 0] arr[0, 3] arr[2, 0] arr[2, 3]); system.out.print(arr[1, 1] arr[1, 4] arr[3, 1] arr[3, 4]); system.out.print(arr[0][0] arr[0][3] arr[2][0] arr[2][3]); system.out.print(arr[0][0] arr[0][2] arr[3][0] arr[3][2]);
The elements of the array's four corner elements can be printed using the following.
System.out.print(arr[0][0] + arr[0][3] + arr[2][0] + arr[2][3]);
What does "array" mean?An array, a kind of data structure, is a group of items, each of which is identifiable from at least one the array's ends or key. A mathematical formula may identify the position of each element in an array given its index tuple.
In C, how is an array defined?Arrays are used to store several values in a single variable as opposed to having separate variables for each value. To create an array, specify the type of data (such as int) as well as the array name, both enclosed in square brackets.
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a traffic engineer developed the continuous function r, graphed above, to model the rate at which vehicles pass a certain intersection over an 8-hour time period, where r(t) is measured in vehicles per hour and t is the number of hours after 6:00 am. according to the model, how many vehicles pass the intersection between time t
14400 vehicles pass the intersection between time t, according to the model.
Why do so many drivers run red lights?One of the main reasons motorists run red lights by accident is because they are distracted or not paying attention. Red light running has been linked to passengers, drowsiness, GPS, smartphones, and radios. 57% of motorists say they eat or drink while driving. Twenty-nine percent of drivers admit to texting while driving.
Which city has the most people who run red lights?According to the National Coalition for Safer Roads, Houston is the most dangerous city in the United States for running red lights, with 181 fatalities from 2004 to 2013. From 2004 to 2013, the fatalities caused by running red lights in US cities are depicted in this chart.
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which type of shoring should be used to prevent vertical movement of a vehicle when its tires or suspension system cannot withstand g-loads without failure?
The correct answer is rolling shoring type of shoring should be used to prevent vertical movement of a vehicle when its tires or suspension system cannot withstand g-loads without failure.
To prevent damage to the aircraft's cargo floor, loading ramps, and airport parking lots, use rolling shoring. When transporting a vehicle across surfaces, this kind of shoring is employed to prevent damage (Figure 6-3). The deployment of the organic/attached troops by the deploying units is planned, organised, and carried out. Minimizing the amount of time a moving unit is not in use must be a top priority. used to prevent damage to the aircraft floor, aircraft ramps, and airfield parking ramps. - Lay down on the aircraft's ramp and floor when loading or unloading cargo. -Place throughout the whole path taken by the vehicle.
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the statue of liberty's pedestal is concrete and at the time it was built was one of the largest pours ever attempted. the builders wanted to use concrete, instead of the granite called for in the design, to prove that it could be done. True or false?
To demonstrate that it could be done, the builders chose to utilize concrete rather than the granite specified in the plan. True
Is concrete used to build the Statue of Liberty?For its numerous products, cement received numerous national and international prizes for innovation. They agreed to supply 8,000 barrels of Portland cement to the United States in 1886 as part of one of the largest contracts of their professional lives. This cement was used to build the base of the Statue of Liberty.
What does the Statue of Liberty's pedestal represent?The stone construction between the base of the statue and the old, star-shaped battle fort is referred to as the pedestal. It raises the statue and supports her at the same time. Tickets for pedestals provide you entry inside and access to the outside balcony that is located immediately beneath the statue's feet.
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How to create Profit Centric Design Professionals ?
Profit-Centric Design Professionals can be developed by training and educating people on design principles, business strategies, and user research in order to create profitable solutions.
What does profit-centric mean?A profit center is a branch or division of a company that directly contributes to the bottom-line profitability of the corporation. A profit center is treated as a separate business, with revenues recorded separately.
Developing Profit Centric Design Professionals entails design, business, and user research training in order to create profitable solutions for clients.
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A programmer wants to determine whether a score is within 10 points of a given target. For example, if the target is 50, then the scores 40, 44, 50, 58, and 60 are all within 10 points of the target, while 38 and 61 are not.
Which of the following Boolean expressions will evaluate to true if and only if score is within 10 points of target ?
Selected Answer: [None Given]Answers:
(score ≤ target + 10) AND (target + 10 ≤ score)
(target + 10 ≤ score) AND (score ≤ target - 10)
(score ≤ target - 10) AND (score ≤ target + 10)
(target - 10 ≤ score) AND (score ≤ target + 10)
If and only if the score is within 10 points of the target, the following Boolean expressions will evaluate to true.
(target - 10 ≤ score) AND (score ≤ target + 10)
A logical statement that can only be either TRUE or FALSE is called a Boolean expression. Any form of data may be compared using boolean expressions as long as both portions of the expression use the same fundamental data type. Data can be tested to see if it is more than, equal to, or less than other data.
A Boolean expression can include Boolean information like the following:
the BOOLEAN values (YES and NO, and their synonyms, ON and OFF, and TRUE and FALSE)
variables or formulae in BOOLEAN
Boolean-results-producing functions
Calculated via comparison operators are BOOLEAN values.
Consider the following Boolean statement to be part of your code, for instance. genuine GT 20000
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Which of the following is static characteristics of measurement?
Unwanted static traits in measurement systems include drift, static inaccuracy, dead zone, and non-linearity.
Which one of the following does not describe a measurement system's static characteristics?
Explanation:Sincerity is not a fixed quality.It is an element of an instrument's dynamic.In terms of measurements, fidelity relates to how accurate a number is when compared to a quantity that hasn't experienced any dynamic mistakes.
What qualities does measuring have?It offers a definition for each of the five key attributes of a measuring device: scale length, sensitivity, accuracy, "finesse," and response time.
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Consider a wave that is traveling in the positive z direction, which is incident on a junction with another transmission line. The wave is on transmission line 1 in the region z 0, with characteristic impedance Zo1, and to the right of the junction (z> 0) is transmission line 2 with characteristic impedance Zo2. Assume for simplicity that the incident voltage wave has a voltage of 1.0 [V]. Solve for the reflected and transmitted voltages and currents on both sides of the junction. From this, show that the total current is continuous at the junction. Also show that the total power flowing in the z direction is the same on either side of the junction. Recall that the voltage transmission coefficient is related to the voltage reflection coefficient by Note that the total voltage and current on the left line (ine1) are found from summing the voltage and current for the incident and reflected waves, while the total voltage and current on the right line (line 2) are those of the transmitted wave. Also, note that power is given by P-VI, where Vand I are the total voltage and current in the time domain.
The correct answer is According to P = V I and P = V/I, the source's power (P) input to the circuit is determined.
P = E/t is the equation, where P stands for power, E for energy, and t for time in seconds. According to this equation, power is defined as the amount of energy consumed per unit of time. Ohm's Law states that the electrical current in a circuit may be estimated by dividing the voltage by the resistance in the first iteration of the calculation, I = V/R. In other words, the voltage and resistance are inversely related to the current and directly proportional to each other. Ohm's Law describes the connection between current, voltage, and resistance. This asserts that, given the temperature is constant, the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the circuit resistance.
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8. students score the math scores of students have been stored in the studenttable. write a query to print the ids and the names of the students who have secured higher than the average score. the result should be sorted in ascending order of student id. input format student
The correct answer is We need to utilise the GROUP BY clause combined with an aggregate function like AVG to get the aggregate value of a column according to another column. Our outcome is based on the column specified following the GROUP BY clause.
A table's columns can be added, removed, or modified using the SQL ALTER TABLE command. a list of the users who are now logged into the computer is shown using the common Unix command. The command w, which offers the same information as the who command but additionally displays extra data and statistics, is connected to who. Try answering questions with high marks first, such as those with a 6 out of 10, to boost your confidence. There is no need for additional books if you have completed your preparation entirely utilising NCERT. Also, when doing last-minute preparations, quickly scan formulae, theorems, crucial points, and important notes.
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a) design seismic loads on a building generally decrease with increased weight/mass of the building because of the inertia of the building. true/false
The correct answer is false design seismic loads on a building generally decrease with increased weight/mass of the building because of the inertia of the building.
One of the fundamental ideas in earthquake engineering is seismic loading, which refers to applying a seismic oscillation on a structure. It occurs where a structure makes touch with the ground or with other buildings. After transforming the Total Seismic Weight into a horizontal direction by multiplying it by the seismic response coefficient Cs, the seismic load is determined. In order to simulate the seismic contribution of the slab weight and any extra dynamo loads, the computer will apply a diaphragm surface load.Because the earthquake load is a "dynamic load," it causes buildings to vibrate.
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To complete this exercise, you must determine what IPv4 addresses you should use on the workgroup for which you are responsible. Your supervisor has assigned you a group of computers that consists of three servers and seven workstations. Your entire department must share an IPv4 network with the address 192.168.75.0/24, and your supervisor has asked you to subnet that address into as many networks as possible with at least 10 hosts each.
Number of subnets : maximum amount possible
Number of needed hosts: 10 each
Network Address is 192.168.75.0/24
Default Subnet Mask 255.255.255.0 (/24 = 3 Bytes of Network Addresses and 1 byte of hosts)
Subnet Mask 192 224 240 248 252 254 255
Magic Number 128 64 32 16 8 4 2 1
Network 2 4 8 16 32 64 128 256
Hosts 256 128 64 32 16 8 4 2
CIDR /25 /26 /27 /28 /29 /30 /31 /32 Add the Rows you will need to the table below and create a list of the network addresses and broadcast addresses your subnetting can create using CIDR notation
Create a list of ranges your subnetting can create using CIDR notation
You must choose an IPv4 CIDR block for the subnet from your VPC's range in order to add it to your network. The Availability Zone in which you wish the subnet to live might be specified. The same Availability Zone can house numerous subnets.
To manage subnets and IP addresses, select IP Address Manager > IP Addresses > Manage. Click the subnet to which you want to add your new IP address range in the network tree window on the left. Add IP Range by clicking. Your IP address range's beginning and ending IP addresses should be entered. The amount of bits available for the IP address is denoted by the CIDR notation, which is essentially simply a shorthand for the subnet mask. For instance, the IP address 192.168.0.101 and subnet mask 255.255.255.0 are equal when the /24 in 192.168.0.101/24 is used. Using slash notation, CIDR notation adds the total amount of bits in the full address while also compactly indicating the network mask for an address. 192.168.129.23/17, for instance, denotes a 17-bit network mask.
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Consider a simplified program, where we can ONLY draw circles and rectangles on the canvas (no need to consider other shapes). Choose one of these languages: C++/C#/Java, and write down some pseudo-codes (i.e. doesn’t need to be grammatically accurate) for the following questions.
1. Define two classes for a Circle and a Rectangle. For both classes, we would also like to know where the center of the circle/rectangle is, and be able to get the area of the circle/rectangle.
2. Obviously, these two classes share some common "characteristics". Define a "Shape" class that encapsulates these common characteristics. What is the name of the relationship between the Rectangle/Circle class and Shape class, and what do you need to change about your codes in Q1? Also, why do we want/need the "Shape" class at all?
3. Should you be able to draw an "unspecified" Shape on the canvas? Or does it have to be a rectangular or circle? What does this mean about the Shape class? Hint: I’m looking for the word "abstract" in your answer.
4. Also note that, the Shapes above all have colors, fills, shades, outlines, etc. To simplify it, let’s combine all of these aesthetic elements of the Shape into one thing, and call it the "Style" of the Shape. If we want to include these information, what changes would you need to make to your previous codes?
5. Should Style be its own class? (Hint: yes). What is the relationship between Shape and Style in your code/design? Hint: your answer should be one or more of the following: association, aggregation, composition, inheritance.
6. Now, the user wants to draw something on the canvas. There are many ways to do this, but let’s follow this method: there is a Canvas class, with a "draw" function. The user decides upon the shape first, then clicks on the canvas, and the "draw" function is called, and the shape shows up on the canvas. Write the sketch codes for the Canvas class and the "draw" function in this scenario.
7. What’s the relationship between Canvas and Shape: association, aggregation, composition, inheritance? Compare this relationship to the relationship between Shape and Style, what are the differences, if there are any? Explain what would happen to the Shape instances on a Canvas instance, when you delete a Canvas instance?What would happen to the "Style instances" when you delete a Shape instance? (20pts)
Canvas only allows rectangles and pathways as primitive shapes, unlike SVG (lists of points connected by lines). Every other shape must be produced by mixing a few different pathways.
Fortunately, there are a variety of route sketching functions available, making it possible to create quite complicated shapes. Rectangles are made using the rect() function. The rectangle should be drawn on the canvas using the stroke() or fill() methods. begin Path() starts a path.Arc(x,y,r,startangle,endangle) - Arcs or curves are created. arc() can be used to draw a circle: Make the start angle 0 and the finish angle 2*Math. PI. The circle's center's x- and y-coordinates are determined by the x and y parameters.
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the voltage at the load side is higher than the voltage at the terminals of the generator, which of the following must be true? A The load is disconnected, and no power is delivered to the load. B. None of the other choices are correct C. The generator is unable to produceractive power, therefore, the reactive power is flowing from the load to the generator D. The load has a poor power factor and it's absorbing too much reactive power E. The reactive power is towing from the load to the generator
The voltage at the load side is higher than the voltage at the terminals of the generator,E. The reactive power is towing from the load to the generator.
What is the generator?A generator is a device or machine that produces a continuous supply of energy in the form of electrical power, mechanical power, or heat. Generators can be used to power many different types of equipment, including appliances, lighting, motors, and machines. Generators can also be used as an emergency backup power source in the event of a power outage.
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# Ex 1: Check if mtcars is a dataframe using is.data.frame(). mtcars is built in dataset. To access available datasets use data()
```{r}
is.data
```
# Ex 2: Create a matrix "mat" and convert it into a dataframe:
```{r}
mat <- matrix(1:25,nrow = 5)
```
# Ex 3: Set the built-in data frame mtcars as a variable df.
```{r}
df <-
```
# Ex 4: Select the rows where all cars have 6 cylinders (cyl column)
```{r}
```
####################################################################################
############################ R Function Exercises ###############################
####################################################################################
# Ex 5: Create a function that will return the product of two integers.
```{r}
prod <- function(num1,num2){
.............
.............
}
prod(3,4)
```
# Ex 6: Create a function that accepts two arguments, an integer and a vector of integers. It returns TRUE if the integer is present in the vector, otherwise it returns FALSE. Make sure you pay careful attention to your placement of the return(FALSE) line in your function!
```{r}
num_check <- function(num,v){
.............
.............
}
num_check(2,c(1,2,3))
```
# Ex 7: Create a function that accepts two arguments, an integer and a vector of integers. It returns the count of the number of occurences of the integer in the input vector.
```{r}
num_count <- function(num,v){
.............
.............
}
num_count(2,c(1,1,2,2,3,3))
```
# Ex 8: We want to ship bars of aluminum. We will create a function that accepts an integer representing the requested kilograms of aluminum for the package to be shipped. To fullfill these order, we have small bars (1 kilogram each) and big bars (5 kilograms each). Return the least number of bars needed.
```{r}
bar_count <- function(pack){
.............
.............
}
bar_count(6)
bar_count(17)
```
# Ex 9: Create a function that accepts 3 integer values and returns their sum. However, if an integer value is evenly divisible by 3, then it does not count towards the sum. Return zero if all numbers are evenly divisible by 3. Hint: You may want to use the append() function.
```{r}
summer <- function(a, b, c){
.............
.............
}
summer(7,2,3)
summer(3,6,9)
summer(9,11,12)
```
# Ex 10: Create a function that will return TRUE if an input integer is prime. Otherwise, return FALSE. You may want to look into the any() function. There are many possible solutions to this problem.
```{r}
prime_check <- function(num) {
.............
.............
}
Most used R built-in data sets
mtcars: Motor Trend Car Road Tests
The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973–74 models)
Format
A data frame with 32 observations on 11(numeric) variables.
View the content of mtcars data set:
1. Loading
data("mtcars")
2. Print
head(mtcars)
## mpg cyl disp hp drat wt qsec vs am gear carb
## Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
## Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
## Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
## Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
## Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
## Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
It contains 32 observations and 11 variables: # Number of rows (observations)
nrow(mtcars)
## [1] 32
[1] 32 # Number of columns (variables)
ncol(mtcars)
## [1] 11
If you want to learn more about mtcars, type this:
?mtcars
select head of mtcars data set
head(mtcars)
## mpg cyl disp hp drat wt qsec vs am gear carb
## Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
## Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
## Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
## Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
## Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
## Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
select end of mtcars data set
tail(mtcars)
## mpg cyl disp hp drat wt qsec vs am gear carb
## Porsche 914-2 26.0 4 120.3 91 4.43 2.140 16.7 0 1 5 2
## Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.9 1 1 5 2
## Ford Pantera L 15.8 8 351.0 264 4.22 3.170 14.5 0 1 5 4
## Ferrari Dino 19.7 6 145.0 175 3.62 2.770 15.5 0 1 5 6
## Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.6 0 1 5 8
## Volvo 142E 21.4 4 121.0 109 4.11 2.780 18.6 1 1 4 2
summaries the data set
summary(mtcars)
## mpg cyl disp hp
## Min. :10.40 Min. :4.000 Min. : 71.1 Min. : 52.0
## 1st Qu.:15.43 1st Qu.:4.000 1st Qu.:120.8 1st Qu.: 96.5
## Median :19.20 Median :6.000 Median :196.3 Median :123.0
## Mean :20.09 Mean :6.188 Mean :230.7 Mean :146.7
## 3rd Qu.:22.80 3rd Qu.:8.000 3rd Qu.:326.0 3rd Qu.:180.0
## Max. :33.90 Max. :8.000 Max. :472.0 Max. :335.0
## drat wt qsec vs
## Min. :2.760 Min. :1.513 Min. :14.50 Min. :0.0000
## 1st Qu.:3.080 1st Qu.:2.581 1st Qu.:16.89 1st Qu.:0.0000
## Median :3.695 Median :3.325 Median :17.71 Median :0.0000
## Mean :3.597 Mean :3.217 Mean :17.85 Mean :0.4375
## 3rd Qu.:3.920 3rd Qu.:3.610 3rd Qu.:18.90 3rd Qu.:1.0000
## Max. :4.930 Max. :5.424 Max. :22.90 Max. :1.0000
## am gear carb
## Min. :0.0000 Min. :3.000 Min. :1.000
## 1st Qu.:0.0000 1st Qu.:3.000 1st Qu.:2.000
## Median :0.0000 Median :4.000 Median :2.000
## Mean :0.4062 Mean :3.688 Mean :2.812
## 3rd Qu.:1.0000 3rd Qu.:4.000 3rd Qu.:4.000
## Max. :1.0000 Max. :5.000 Max. :8.000
quantiles of dataset
quantile(mtcars$wt)
## 0% 25% 50% 75% 100%
## 1.51300 2.58125 3.32500 3.61000 5.42400
select quantiles by percent
To calculate the quantiles by percent:
quantile(mtcars$wt, c(.2, .4, .8))
## 20% 40% 80%
## 2.349 3.158 3.770
variance of weight
To calculate the variance of weight:
var(mtcars$wt)
## [1] 0.957379
Historgram
Histograms are a classic way to assess the shape of the distribution of a single variable.
To get the histogram of hp, the code below will produce a histogram:
hist(mtcars$hp)
We explored some of the common functions in R that I like to use to explore a data frame before I conduct any statistical analysis. We used the built-in data set mtcars to illustrate these functions.
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