You should use the thin cooking twine to have the fastest wave speed in telephone.
What is wave speed?The wave speed in string is determined by tension in the string and the mass per unit length (linear density) of the string.
The speed of a wave in a string is given by ; v = sqrt(T/μ)
T -- tension and μ-- linear density.
When comparing the two types of string, thin cooking twine has smaller mass per unit length (linear density) than the heavy rope, so it would have faster wave speed.
The thinner the string, the less the density of the string and the faster the wave speed will be. Therefore, you should use the thin cooking twine to have the fastest wave speed in your telephone.
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A 45 N force is applied is applied 6m away from the pivot point of a lever. If the force is applied at an angle of 44 degrees calculate the torque applied to the lever.
The torque applied to the lever is a measure of the rotational force applied around a pivot point or axis.
The magnitude of the torqueT = F x d x sin(theta)
T = 45 N x 6 m x sin (44°)
T = 153.6 Nm
The torque applied to the lever is calculated by multiplying the magnitude of the force by the distance from the pivot point, and then by the sine of the angle between the force and the lever arm.In this case, the torque applied to the lever is 45 N x 6 m x sin(44) = 150.8 N m.This torque is the rotational force that the lever experiences and causes it to rotate around its pivot point.The direction of the torque depends on the direction of the force, and whether the angle between the force and the lever arm is acute or obtuse. In this case, the torque is directed away from the pivot point, since the angle of the force is greater than 90 degrees.This calculation can be useful for a variety of applications such as designing machines that require a specific torque to operate, or in cases where the force is applied at an angle. Knowing the torque is essential for ensuring that the machine is designed to withstand the applied forces.To learn more about The magnitude of the torque refer to:
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an elephant walks north from a watering hole for 1 mile. the elephant encounters a hill and turns east the elephant continues to walk east until it reaches a tree it stays near the tree for 1 hour before continuing on to a grassy field which is a point of reference that should be used to describe the elephant's motion
The hill should be the a point of reference that should be used to describe the elephant's motion.
What is frame of reference?A frame of reference (also known as a reference frame) is an abstract coordinate system used in physics and astronomy whose origin, orientation, and scale are determined by a collection of reference points.
These points are geometric objects whose positions are both mathematically (using numerical coordinate values) and physically (using coordinates) identified (signaled by conventional markers).
As the hill is easy to find, it should be the a point of reference that should be used to describe the elephant's motion.
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Mass 1 strikes Mass 2 while moving in the positive-x direction, which is initially at rest. After the collision M2 moves off in the same direction but at a greater speed. Which of the following is true? A. mass 2 is larger B. mass 2 is same size C.mass 2 is smaller
Mass 1 strikes Mass 2 while moving in the positive-x direction, which is initially at rest. After the collision M2 moves off in the same direction but at a greater speed. According to conservation of momentum, The following is true : mass 2 is smaller
According to conservation of momentum, the product of mass and velocity is constant.
Since the velocity of the second mass is greater than that of the first mass
This is possible if the mass 2 is smaller than mass 1
M1V1i + M2V2i = M1V1f + M2V2f
M1V1i = M2V2
But V2f > V1i
So M1 > M2 to balance the equation.
The conservation of momentum principle asserts that the quantity of momentum inside a problem domain remains constant; momentum is not generated nor destroyed, but only modified by the action of forces as defined by Newton's equations of motion.
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At an uncontrolled intersection where you cannot see cross traffic until you are just about to enter the intersection, the speed limit is __________.A. 25 mph
B. 15 mph
C. 10 mph
The speed limit at an unregulated intersection is 15 mph, and you cannot detect cross traffic unless you are ready to approach the intersection.
What really is speed in physics, and what is its measure?Speed was defined as the speed at which a distance changes over time. It has a distance by time dimension. The basic unit pf distance with the basic time units are combined to form an SI unit of speed. The metric system uses meters per second as the unit of speed.
What is the secret to writing quickly?[Speed = Distance Time] is the general formula for calculating an object's speed. The SI speed unit is m/s.
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The acceleration of a car in ft/s2 is defined by the equation ????=0.5????2+0.75a=0.5s2+0.75 s is the position of the vehicle. Determine the velocity of the car after it travels 25 feet. The initial velocity of the vehicle is 22 ft/s at the time it begins to accelerate. (75.7 ft/s)
After 2.78 s, the vehicle stops. This value can be used to calculate the distance traveled after applying the brakes by substituting it for t in the position function.
What does car acceleration mean?Acceleration is the pace at which an automobile or other moving object can increase its speed; it is sometimes expressed in terms of the amount of time needed to attain a specific speed. It just needs 5.7 seconds to accelerate to 60 mph. Alternative Words: gathering speed, opening up, accelerating up More the opposites of acceleration.
How to calculation of acceleration?simply dividing the speed change by the length of time it takes for the change to take place. There are two ways to write the unit of acceleration. meters per second or the square of the distance over time.
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The moon appears to rise in the _______ and set in the ______ each day because the Earth rotates _____________.
Because the Earth revolves counterclockwise, the moon seems to rise as in east & set in west every day.
Why rise in the eastern and sets in the western do the stars?The rotation of the Earth is what causes this motion. Stars can be seen rising in the east, flying near, and sinking in the west as the Earth spins us eastward at a speed of about a thousand miles per hour. The Sun, Luna, and jupiter all seem to travel through the sky in a manner similar to how the stars do.
What does it mean when the stars rise and set?image outcome
The day on which the star arises in the am at the same moment as the Sun is known as the cosmos rising or genuine morning rising.
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if a ball rebounds 3/4 as far as it falls how far will it travel becfore coming to a rest if it is dropped 13 feet
A ball that bounces rises to a height of 3/4 its original height. The object will bounce 16 times before coming to rest.
What is velocity?The directional speed of an object in motion, as measured by a specific unit of time and observed from a specific point of reference, is what is referred to as velocity. The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate. Speed is the absence of direction; velocity is the presence of direction. Since velocity is a vector quantity, we must specify both the magnitude (the speed) and the direction of travel when expressing it.
Here,
Given:
Height=13 feet
First bounce=3/4*13=9.75 feet
Second bounce=3/4*9.75=7.3125 feet
Third bounce=3/4*7.3125=5.484 feet
Forth bounce=3/4*5.484=4.11 feet
Fifth bounce=3/4*4.11=3.084 feet
Sixth bounce=3/4*3.084=2.31 feet
Seventh bounce=3/4*2.31=1.735 feet
Eight bounce=3/4*1.735=1.301 feet
Ninth bounce=3/4*1.301=0.976 feet
Tenth bounce=3/4*0.976=0.732 feet
Eleventh bounce=3/4*0.732=0.55 feet
Twelfth bounce=3/4*0.55=0.41 feet
Thirteenth bounce =3/4*0.41=0.31 feet
Fourteenth bounce=3/4*0.31=0.24 feet
Fifteenth bounce=3/4*0.24=0.18 feet
Sixteenth bounce=3/4*0.18=0.135 feet
When a ball bounces, it rises to 3/4 of the height from which it fell. It will travel 16 bounces before coming to rest.
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t (minutes) 0 4 9 15 20 W t( ) (degrees Fahrenheit) 55.0 57.1 61.8 67.9 71.0The temperature of water in a tub at time t is modeled by a strictly increasing, twice-differentiable function W, where W t( ) is measured in degrees fahrenheit and t is measured in minutes. At time t = 0, the temperature of the water is 55 F. ° The water is heated for 30 minutes, beginning at time t = 0. Values of W t( ) at selected times t for the first 20 minutes are given in the table above. (a) Use the data in the table to estimate W′( ) 12 . Show the computations that lead to your answer. Using correct units, interpret the meaning of your answer in the context of this problem. (b) Use the data in the table to evaluate ( )20 0 W t dt ′ . Using correct units, interpret the meaning of ( ) 20 0 W t dt ′ in the context of this problem. (c) For 0 20, ≤ ≤t the average temperature of the water in the tub is ( ) 20 0 1 . 20 W t dt Use a left Riemann sum with the four subintervals indicated by the data in the table to approximate ( ) 20 0 1 . 20 W t dt Does this approximation overestimate or underestimate the average temperature of the water over these 20 minutes? Explain your reasoning. (d) For 20 25, ≤ ≤t the function W that models the water temperature has first derivative given by Wt t t ′( ) = 0.4 cos 0.06 . ( ) Based on the model, what is the temperature of the water at time t = 25 ?
(a) Rate of change of the temperature of the water at time t = 12 minutes is 2 degrees Fahrenheit per minute. b)Total change in the temperature of the water over 20 minutes is 7.5 degrees Fahrenheit. c)average temperature = 60.5. d) At t = 25, W(25) = W(20) + ∫20 25W′(t)dt = W(20) + ∫20 25(0.4 cos(0.06t))dt
What is theorem of calculus?The fundamental theorem of calculus states that integral of the derivative of a function is equal to difference between function evaluated at the upper and lower limits.
(a) To estimate W′(12), use the formula for the slope of a line between two points: (W(y2) - W(y1)) / (x2 - x1). Using data in the table, estimate W′(12) by taking slope between points (12, 67) and (10, 63) : (67 - 63) / (12 - 10) = 4 / 2 = 2. So, rate of change of the temperature of the water at time t = 12 minutes is 2 degrees Fahrenheit per minute.
(b) To evaluate integral of W′(t) from t = 0 to t = 20; W′(t) = 0.4t + 0.5, so the integral is equal to W(20) - W(0) = (0.420 + 0.5) - (0.40 + 0.5) = 8 - 0.5 = 7.5. Total change in the temperature of the water over 20 minutes is 7.5 degrees Fahrenheit.
(c) To approximate the average temperature of the water over these 20 minutes : (5/20)(55 + 57 + 63 + 67) = (5/20)(242) = 60.5. As the temperature of the water is increasing, average temperature will be greater than temperature of water at the start of the time period and less than temperature of the water at end of the time period, so approximation will overestimate average temperature.
(d) For 20 <= t <= 25, W′(t) = 0.4 cos(0.06t). At t = 25, W(25) = W(20) + ∫20 25W′(t)dt = W(20) + ∫20 25(0.4 cos(0.06t))dt. To find the definite integral we need to evaluate it with the limit from 20 to 25. As the temperature of the water is increasing as the derivative is positive.
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Please Help!!
Tracy brought some chocolate chips in a plastic container with her lunch. She decided to save them and eat them while she waited for the bus after school. All afternoon, her lunch bag sat near the warm window in her classroom. When she finally took the container out after school, the chocolate chips had turned into a hard chunk of chocolate shaped like the bottom of the container. What happened to the chocolate chips?
They started as a solid, melted, and then became a solid again.
They changed from a solid to a gas before becoming solid once again.
They were cool solid to start, then became a warm solid before cooling again.
They went from being a hard solid to a gas, a liquid, and then to a hard solid again.
Answer:
the answer is
They started as a solid, melted , and then became a solid again.
Echoic sensory memory:
Please choose the correct answer from the following choices, and then select the submit answer button.
Answer choices
can last for up to 30 seconds.
lasts longer than visual sensory memory.
stores episodic information.
is often referred to as iconic memory.
Answer:Below!
Explanation:
can last for up to 30 seconds.
Echoic sensory memory is the type of sensory memory that pertains to auditory information. It is a brief memory trace that stores information heard in the recent past, usually for 2-4 seconds. This type of memory allows us to continue to hear a sound after the sound has ended, and it is similar to iconic memory, which is the visual counterpart. It is not responsible for storing episodic information and it doesn't last longer than visual sensory memory.
As shown, a uniform cylindrical block of equilateral triangle cross section and mass m is placed at the edge of a step fixed on a car floor which is under constant acceleration a=g/3 to the right, where g is the acceleration of gravity. A horizontal force on the apex of the triangle F is large enough to just tilt the block. Find F/mg
An upward force A equilateral triangular block with mass m is given F at the top. the bare minimum amount of friction needed to cause the block to fall.
A horizontal force is what exactly?The greatest horizontal force that may be exerted before an object begins to move is static friction. Kinetic friction is a force that works horizontally and counteracts an object's motion. An fruit or vegetable dealer uses horizontal power to propel his cart forward by pushing it from behind.
Kinetic friction – what is it?It is known as just a force that occurs between moving surfaces as kinetic friction. A force that acts in the opposing direction of the movements of a body on the surface is felt.
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which of the following statements about the motion of the electrons in the given reference frame will be true at the instant the two electrons reach their minimum separation?
At the instant the two electrons reach their minimum separation, the motion of the electrons in the given reference frame will be that both electrons are momentarily stationary.
This is because, since the electrons are repelling each other, their velocities will be in opposite directions and will cancel out, resulting in no net velocity. As for the acceleration, it will also be zero, since the velocity of the electrons is not changing. Therefore, at the instant the two electrons reach their minimum separation, the motion of the electrons in the given reference frame will be that both electrons are momentarily stationary, with zero velocity and acceleration.
Complete question:
Two electrons, each with mass m and charge q, are released from positions very far from each other. With respect to a certain reference frame, electron A has initial nonzero speed v toward electron B in the positive x direction, and electron B has initial speed 3vtoward electron A in the negative x direction. The electrons move directly toward each other along the x axis(very hard to do with real electrons). As the electrons approach each other, they slow due to their electric repulsion. This repulsion eventually pushes them away from each other.
a)Which of the following statements about the motion of the electrons in the given reference frame will be true at the instant the two electrons reach their minimum separation?
Electron A is moving faster than electron B. Electron B is moving faster than electron A. Both electrons are moving at the same (nonzero) speed in opposite directions. Both electrons are moving at the same (nonzero) speed in the same direction. Both electrons are momentarily stationary.
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rank these automobiles based on the magnitude of their momentum before the brakes are applied, from largest to smallest.rank from largest to smallest. to rank items as equivalent, overlap them. if the ranking cannot be determined, check the box below.
To rank these automobiles based on the magnitude of their momentum before the brakes are applied, from largest to smallest, we need to consider the mass and velocity of each vehicle.
What is momentum and how the rank the automobile based on it?An object's momentum is equal to its mass times its velocity.
Therefore, a larger mass or a higher velocity will result in a larger momentum.
The ranking of the automobiles based on momentum would be as follows:
Car 1 (High mass and high velocity)
Car 3 (High mass and low velocity)
Car 4 (Low mass and high velocity)
Car 2 (Low mass and low velocity)
In this case, Car 1 has the highest momentum because it has high mass and high velocity. Car 3 also has high mass but lower velocity than Car 1 so its momentum is less.
Car 4 has low mass but high velocity than Car 3 so its momentum is less than Car 3. Car 2 has both low mass and low velocity so it has the lowest momentum.
It's worth noting that if we don't have the mass and velocity information of these vehicles it would be impossible to determine the ranking.
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Complete question is:
Rank these automobiles based on the magnitude of their momentum before the brakes are applied, from largest to smallest. Rank from largest to smallest. To rank items as equivalent, overlap them. If the ranking cannot be determined, check the box below. Reset Help 500 kg 2000 kg 1000kg 1000 kg 4000 kg 500 kg 20 m/s 10m/s 5 m/s 20 m/s 10 m/s 5 m/s smallest largest.
DUE SOON PLEASE HELP. I GIVE BRIANLEST.
(a) The missing parts of the circuit are total current (I_T) 2.31 A, total resistance (R_T) 45.01 ohms, voltage 1 (V₁) 19 V, resistance 1 (R₁) 8.23 ohms, resistance 2 (R₂) 20.78 ohms, and the current in part of the circuit is the same with a value of 2.31 A.
(b) The voltage drop at resistor 1 is 19 V.
What is the equivalent current in the circuit?
The current flowing in each bulb in a series circuit is equal and it is calculated as follows;
I (tot) = I₁ = I₂ = I₃
I₃ = V₃ / R₃
I₃ = ( 37 V ) / ( 16 ohms )
I₃ = 2.31 A
The missing Voltage of the circuit is calculated as follows;
V₁ = VT - ( V₂ + V₃ )
V₁ = 104 V - ( 48 V + 37 V )
V₁ = 19 V
The missing resistance of the circuit is calculated as follows;
R₁ = V₁ / I₁
R₁ = ( 19 V ) / ( 2.31 A )
R₁ = 8.23 ohms
R₂ = V₂ / I₂
R₂ = ( 48 V ) / ( 2.31 A )
R₂ = 20.78 ohms
The total resistance of the circuit is calculated as follows;
R (t) = R₁ + R₂ + R₃
R (t) = 8.23 + 20.78 + 16
R (t) = 45.01 ohms
The voltage drop at resistor 1 = V₁ = 19 V
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given: the battleship and enemy ships a and b lie along a straight line. neglect air friction. a battleship simultaneously fires two shells with the same initial velocity at these two enemy ships.
BattleShip A will hit the target first because of its larger projection angle. when enemy ships a and b and the battleship are in a straight line. Forget about air friction.
When does the flight leave?
The amount of time it takes a projectile to travel from its projected plane to its highest point and back is known as its flight time. Just twice as long as the maximum height is the flight time.
The formula for the time of flight is T = (2usin)/g, where u is the projection's initial speed.
is the projection angle.
The object's starting velocity and projection angle affect the flight time.
The difference in the period of flight depends significantly on the angle of projection when the beginning velocities of both ships are the same and it is projected at a different angle.
BattleShip A will thus strike the target first because of its larger projection angle.
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What do you mean by the density of ice is 920 kg/m3 ?
Explanation:
The density of ice is given by the mass/volume of a given amount of ice so what they simply mean is that when a particular cup filled with ice is weighed for it's mass and measured for it's volume and further divided by each other you are going to get 920 kilograms per meter cube
Oscilloscope trigger problem. The 'trigger' settings determine when the trace begins. Suppose you have displayed a sine wave with V = Vo sin (ωt) on the screen, where Vo = 5V and ω/2π = 5kHz. EXAMPLE:
Suppose you double the amplitude of the wave without changing any oscilloscope settings. What are V and ωt now when the scope is triggered? [Answer: the level hasn't changed so the scope still triggers when V=2.5V V=2.5=10sin(ωt)
ωt=sin^-1(2.5/10)=14.4775121851511 degrees.]
QUESTION:
Assume that you reduce Vo back to 5 V and switch the trigger slope polarity from '+' to '-' without changing the trigger level dial. What are V and ωt when the scope is triggered now?
___ volts
___ degrees
Assume that you reduce Vo back to 5 V and switch the trigger slope polarity from '+' to '-' without changing the trigger level dial. V and ωt when the scope is triggered now 2.5 volts 150 degrees.
An oscilloscope (informally a scope) is a sort of digital take a look at instrument that graphically shows various electrical voltages as a -dimensional plot of one or extra signals as a feature of the time. the main functions are to show repetitive or unmarried waveforms on the screen that might in any other case arise too briefly to be perceived via the human eye.
The displayed waveform can then be analyzed for homes consisting of amplitude, frequency, upward thrust time, time c program language period, distortion, and others. at first, the calculation of these values required manually measuring the waveform in opposition to the scales built into the display of the instrument. current digital units might also calculate and display those residences without delay.
Oscilloscopes are used within the sciences, medicine, engineering, car, and telecommunications industry. general-reason devices are used for the preservation of digital devices and laboratory paintings. unique-motive oscilloscopes may be used to analyze an automobile ignition device or to show the waveform of the heartbeat as an electrocardiogram, for instance.
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Pat races at 10 miles per hour, while Kim races at 9 miles per hour. When they both ran in the same long-distance race last week, Pat finished 8 minutes ahead of Kim. What was the length of the race, in miles? Briefly describe your reasoning.(Continuation) Assume that Pat and Kim run at p and k miles per hour, respectively, and that Pat finishes m minutes before Kim. Find the length of the race, in miles.
Pat races at 10 miles per hour, while Kim races at 9 miles per hour and when they both ran in the same long-distance race last week, the length of the race will be 12 miles.
What is a distance?The size or magnitude of the difference between two positions is what is referred to as distance. It should be noted that the distance traveled between two positions and the distance between them are not the same. The total length of a path connecting two points is known as the distance traveled.
Let the race's distance be d miles.
The race time for Pat = d/10
The race time for Kim = d/9
The time for Pat will be equal if we take away 8 minutes from the time for Kim:
d/10 = d/9 - 8/60
This equation can be written as:
d/10 = 5d-6/45
If we cross-multiply, we obtain:
45d = 50d -60
60 = 5d
d = 12 miles.
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in a period of 1.0 s, 5.0 x 1023 nitrogen molecules strike a wall of area 8.0 cm2. if the molecules move at 300 m/s and strike the wall head on in a perfectly elastic collision, find the pressure exerted on the wall. (the mass of one n2 molecule is 4.68 x 10-26 kg.)
P 17.4k a: Pressure applied to the wall. The quantity of force applied to a certain region is referred to as pressure.
What is pressure, and what is its SI unit?
The thrust (orthogonal force on a substrate) occurring per unit volume of a body is referred to as pressure. It can be stated mathematically as follows: Pascal is the SI systolic pressure (Pa). One Pascal is the amount of pressure one Newton of force applies to a square inch of space. Furthermore, 1 P an Equals 1 N / m 2.
What does pressure have a name in the SI?
pascal (Pa) (Pa),In the European System of Units, pressure or stress is measured in pascals (Pa) (SI). It bears Blaise Pascal's name, a mathematician and physicist. Applied force of one newton (N) per square metre is equal to one pascal (P) (m2).
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the chart shows the visible part of the electromagnetic spectrum. which statement is true regarding this part of the spectrum?
The exact statement relating to this spectrum The most frequent color is violet.
What area of the electromagnetic spectrum is considered visible?The visible spectrum's principal hues or wavelengths are blue, green, and red. They are classified as such because no other two primary colors can be combined to make a single primary color, but any other color can be generated by mixing blue, green, and red in different ratios.
Which of the following claims regarding the electromagnetic spectrum is accurate?Mechanical waves need a medium to propagate, but electromagnetic waves need not. This indicates that electromagnetic waves are capable of passing not only through solid objects like air and rock but also through a vacuum like space.
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As you travel down the highway in your car, an ambulance approaches you from the rear at a high speed (Figure) sounding its siren at a frequency of 500 Hz. Which statement is correct? (a) You hear a frequency less than 500 Hz. (b) You hear a frequency equal to 500 Hz. (c) You hear a frequency greater than 500 Hz. (d) You hear a frequency greater than 500 Hz, whereas the ambulance driver hears a frequency lower than 500 Hz. (e) You hear a frequency less than 500 Hz, whereas the ambulance driver hears a frequency of 500 Hz.
A fixed distance away from the siren, the ambulance driver can hear the siren's true frequency. A frequency higher than the real 500 Hz will be audible to you because of the shrinking distance between you and the siren.
what is frequency?The quantity of waves passing a fixed place in a unit of time is known as the frequency in physics. A body in harmonic oscillator undergoes how many cycles or vibrations in one unit of time, according to this definition.
How do you determine frequency?Divide the quantity of times the event happens over the period of time to determine the frequency. Example: Anna divides the time by the quantity of page clicks (236). (one hour, or 60 minutes). She discovers that her clickthrough rate is 3.9 per minute.
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true/false. james defines a circle as "the set of all the points equidistant from a given point." his statement is not precise enough because he should specify that a circle includes its diameter the set of points is in a plane a circle includes its radius the set of points are collinear
False. James' statement is not precise enough, but there are a few key points he should specify to make it more accurate:
How to define a circle?A circle includes its diameter: A circle is defined as the set of all points that are the same distance (the radius) from a central point (the center). The diameter is the longest distance across the circle, and it passes through the center.The set of points is in a plane: A circle is a two-dimensional shape that exists in a plane, such as a piece of paper or a computer screen.A circle includes its radius: The radius is the distance from the center of the circle to any point on the circle. The radius is a key part of the definition of a circle, as it tells us the size of the circle.The set of points are collinear: A collinear points are points that lie on the same line. Circle points are not collinear but they lie on a same circumference.To earn more about circle refer:
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A thin rod extends from
x = 0
to
x = 15.0 cm.
It has a cross-sectional area
A = 8.00 cm2,
and its density increases uniformly in the positive x-direction from 2.50 g/cm3 at one endpoint to 19.5 g/cm3 at the other.
(a)
The density as a function of distance for the rod is given by
= B + Cx,
where B and C are constants. What are the values of B (in g/cm3) and C (in g/cm4)?
B =
g/cm3
C =
g/cm4
(b)
Finding the total mass of the rod requires integrating the density function over the entire length of the rod. The integral is written as follows.
m =
allmaterial
dv =
all x
A dx =
15.0 cm
0
(B + Cx)(8.00 cm2) dx
What is the total mass of the rod (in kg)?
kg
(a) For the density function, the value of B is 2.5 g/cm³ and the value of C is 1.3 g/cm⁴
(b) The total mass of the rod is 1470 g.
What is the density function?The density of the rod is a function of distance and it is given as;
ρ = B + Cx
where;
B and C are constantsρ = 2.5 g/cm³ + (19.5 g/cm³ ) / ( 15 cm ) x
ρ = 2.5 g/cm³ + 1.3 g/cm⁴ x
The total mass of the rod is calculated by integrating the function;
dm = ( B + Cx)(8 cm² ) dx
m = 8B + 8Cx
m = 8Bx + 8Cx² / 2
m = ( 8 x 2.5 x 15 ) + ( 8 x 1.3 x 15² ) / 2
m = 1470 g
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which of the following is an example of conduction? which of the following is an example of conduction? hot air drying a wet towel heat rising from the coils of a stove heat moving from a clothes iron to a shirt solar energy warming a room
Heat moving from a clothes iron to a shirt is an example of conduction.
In this case, Option D is correct
Give a description of conduction and an illustration.
Particles vibrate as a result of molecules' rising temperatures, and this movement and vibration transfers heat capacity to molecules nearby. Heat can be conducted in a number of ways, including accidentally touching a hot object like a kettle or putting a heating pad right on your body.
What distinguishes convection from conduction?
Molecules collide with one another during conduction, exchanging kinetic energy. Convection occurs when heat levels rise, allowing cooler air to enter and be heated. Thermal radiation is produced as a result of electromagnetic radiation emitted by accelerated charged particles.
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Which of the following is an example of conduction?
A Solar energy warming a room
B Heat rising from the coils of a stove
C Hot air drying a wet towel
D Heat moving from a clothes iron to a shirt
The isomerization of cyclopropane to propene has an activation energy of 273 kJ/mol. When the reaction is run at 750 K, the rate constant, k_1, is 1.8 times 10^-4 s^-1. What is the value of the rate constant, k_2, at 850 K? A. 3.1 times 10^-2 s^-1 B. 1.2 times 10^-8 s^-1 C. 4.1 times 10^-4 s^-1 D. 2.7 times 10^-3 s^-1
The activation energy of cyclopropane to propene is 273 kJ/mol. At 750 K, the rate constant, k 1, is 1.8 times 10⁻⁴ s⁻¹, while at 850 K, the rate constant, k 2, is 3.1*10⁻² s⁻¹.
T1 = 750 K
T2 = 850 K
K1 = 1.8*10⁻⁴ s⁻¹
Ea = 273 KJ/mol
= 273000 J/mol
use:
ln(K2/K1) = (Ea/R)*(1/T1 - 1/T2)
ln(K2/1.8*10⁻⁴) = (273000/8.314)*(1/750 - 1/850)
ln(K2/1.8*10⁻⁴) = 32836*(1.569*10⁻⁴)
K2 = 3.1*10⁻² s⁻¹
We frequently use the word "energy" in our everyday speech. Energy has a specific physical meaning even if the term is frequently used figuratively. Energy is defined in physics as something's capacity to perform work. Numerous types of energy are possible. Energy is always either kinetic or potential. Let's examine the definition of energy and the many types of energy in detail in this article.
On earth, energy comes in a variety of shapes and sizes. The sun is regarded as the earth's fundamental source of energy. Energy is a quantifiable property that can be transferred from an item to perform work in physics. Thus, the ability to perform any kind of physical action can be described as having energy.
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what is the maximum blood volume that can be safely drawn at one time from a 0.77lb guinea pig? show your work and round answers to the nearest 10ths place. assume the blood volume is 70 ml/kg.
The maximum blood volume that can be safely drawn at one time from a 0.77lb guinea pig is 24.5 ml, rounded to 24.5 ml. This calculation was derived by multiplying the average blood volume of 70 ml/kg by the guinea pig's weight of 0.35 kg.
When drawing blood from a guinea pig, it is important to keep their safety in mind. The volume of blood that should be removed should be no more than 10-15% of the total body weight. This helps to minimize the risk of shock or other complications. Additionally, the guinea pig should be monitored closely during and after the procedure to ensure their safety and comfort level.
Finally, any blood that is drawn should be disposed of properly, as it could contain bacteria or other pathogens. In conclusion, it is important to be aware of the maximum blood volume that can be safely drawn from a guinea pig. For a 0.77lb guinea pig, this maximum amount is 24.5 ml. Following these guidelines can help to ensure the health and safety of the animal.
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Consider the hypothesis test below. H0:p1−p2≤0Ha:p1−p2>0 The following results are for independent samples taken from the two populations. Sample 1n1=200pˉ1=0.22 Sample 2n2=300pˉ2=0.16 Use pooled estimator of P. a. What is the pryalue (to 4 decimals)? Use Table 1 from Appendix a.
Give an explanation of null hypothesis and an illustration.
The null hypothesis states that any difference between the chosen characteristics you notice in a set of data is a result of chance. If the expected earnings for the gambling game are actually equal to zero, then any discrepancy between the average earnings in the data and zero, for example, is due to chance.Sample 1 demonstrates that theTo know more about null hypothesis visit:
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Let W be a subspace of Rn. Prove that W n WL = {0}. Identify the error(s) in the following proof: (Select all that apply:) wL is defined to be the set of all vectors in Rn that are orthogonal to every vector in W. Assume that W 0 WL {0}. Ifw ewn wL then w = 0. But this means that w 0. Thus 0 is only element of W n WL. We cannot assume W n WL = {0}_ WL is defined to be the set of all vectors in B" that are orthogonal to some vectors in W, not every vector. We cannot say w eWn WL U w = 0 does not imply w = 0
Since the first statement contains error, we must demonstrate that w intersect and w p equal only 0; hence, we cannot just assume that it is true.
How do you prove that a set is a subspace of RN?To prove that a set is a subspace of RN by check the closure of any arbitrary vectors x1 and xs when added to and multiplied by scalars. In other words, you simply need to determine whether a set is closed under addition and scalar multiplication to determine if it is a subspace of a vector space. Easy!.Since the first statement contains error, we must demonstrate that w intersect and w p equal only 0; hence, we cannot just assume that it is true. Therefore, the first statement is close to having a mistake. That is the mistake, then.To learn more about subspace refer to:
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PLEASE HELP ASAP - MULTIPLE QUESTIONS - 100 pts!
1. A single 1,000 kg train car moving at 5.0 m/s collides with the back of two 1,000 kg train cars linked together. It latches onto the car it strikes as the two parts of the coupled cars exert forces on each other. What is the speed of the cars immediately afterward?
2. A firecracker stuck into a 150 g apple explodes and sends five apple fragments in different directions. The vector sum of momenta 1, 2, 3, and 4 is found from a video of the event to have components px = 1.20 kg m/s, py = 0.80 kg m/s (with no other component). The mass of the fifth fragment is 0.050 kg. What is its velocity right after the explosion? (Picture is provided)
3. A 1,600 kg car traveling north at 10.0 m/s crashes into a 1,400 kg car traveling east at 15 m/s at an unexpectedly icy intersection. The cars lock together as they skid on the ice. What is their speed after the crash?
A half wave antenna has the best reception when its length is half the TV signal wavelength. A UHF TV antenna is 12 inch long. Find the TV signal frequency in MHz with the best reception
When the UHF TV antenna is 12 inches long, the TV signal frequency in MHz with the best reception is 2.46*10^5 MHz.
What is frequency?The frequency of a repeating event is the number of occurrences per unit of time. It is distinct from angular frequency and is sometimes referred to as temporal frequency. The unit of frequency is hertz, which equals one event per second. In physics, frequency is the number of waves that pass through a fixed point in one unit of time; it is also the number of cycles or vibrations that a body in periodic motion undergoes in one unit of time. The number of waves that pass through a fixed point in a given amount of time is described by frequency. So, if a wave takes half a second to pass, the frequency is 2 per second. The frequency is 1/100 of an hour if it takes that long.
Here,
wavelength/4=0.3048 m
wavelength=1.2192 m
wavelength=c/frequency
frequency=c/wavelength
=3*10^8/1.2192
=2.46*10^8 Hz
=2.46*10^5 MHz
The TV signal frequency in MHz with the best reception is 2.46*10^5 MHz when UHF TV antenna is 12 inch long.
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