Answer:
hikknn says he is not happy birthday hun
What are 4 ways you can determine if a website is reliable?
Answer:
Identify the name of the individual, group or institution that created the website. A reliable website should clearly state the name of its creator. Generally, websites created by government institutions (.gov) and educational institutions (.edu) are considered more reliable.
ECONOMIC Q‼️
Which of these is a common concern of an economist ?
A-The distributions of populations and earths resources
B-How people have organized the rules and laws of their societies
C-The cultural habits and social customs of societies
D-How well resources are used by a society
Answer:
D-How well resources are used by a society
Explanation:
Most economists are concerned with practical applications of economic policy in a particular area, such as finance, labor, agriculture, transportation...
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a uniform metre rule of mass 100g balances at the 40cm mark when a mass X is placed at the 10cm mark what is the value of x.pls help I don't know how to solve it
Answer:
The fulcrum of the metre stick is at the 40 cm mark
100 g * 10 cm = 1000 g-cm clockwise torque
x * 30 cm = 1000 gm-cm = counterclockwise torque for balance
X = 1000 / (40 -10) = 1000 / 30 = 33.3 gm at 10 cm to balance
. Which of the following are forces that push upward on an indoor skydiver? Choose all that apply. *
gravity
acceleration
air resistance
lift
WILL GIVE BRAINLIST
The forces that push upward on an indoor skydiver are lift force and air resistance.
The forces that act on a skydiver moving downwards includes, gravity due to his weight, air resistance and lift force.
The downward forces on the indoor skydiver include the following;
gravity due to its weightdownward force due its accelerationThe upward force on the indoor skydiver include the following;
lift forceair resistanceThus, we can conclude that the forces that push upward on an indoor skydiver are lift force and air resistance.
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Name two processes that release nuclear energy?
Answer: Nuclear energy is released from an atom through one of two processes: nuclear fusion or nuclear fission. In nuclear fusion, energy is released when the nuclei of atoms are combined or fused together. This is how the sun produces energy. In nuclear fission, energy is released when the nuclei of atoms are split apart.
Let me know if it helps!
How to find the energy in a compressed spring.
What is Kepler’s first law?
Answer:
Kepler's First Law: each planet's orbit about the Sun is an ellipse. The Sun's center is always located at one focus of the orbital ellipse. The Sun is at one focus. The planet follows the ellipse in its orbit, meaning that the planet to Sun distance is constantly changing as the planet goes around its orbit.
Answer:
Explanation:
Kepler 's first law - sometimes referred to as the law of ellipses - explains that planets are orbiting the sun in a path described as an ellipse. An ellipse can easily be constructed using a pencil, two tacks, a string, a sheet of paper and a piece of cardboard. Tack the sheet of paper to the cardboard using the two tacks.
The right to gather to advance some political or social cause is known as
Answer:
the first amendment
Explanation:
the first amendment to the United States constitution allows the freedoms concerning religion, expression, assembly, and the right to gather and petition.
Heat rising in a hot-air balloon is an example of __________.
Is mixing mixing sugar and cinnamon a chemical or physical change?
Answer:
It is a physical
Explanation:
a ball is thrown vertically up ward with a velocity of 25m/s. a/how fast was it moving after 2sec?
Answer:
12.5
Explanation:
given
distance=25
time=2sec
required
=speed
solution
=v=s/t
25/2
=12.5m/s
a gas increases in pressure from 2.00 atm to 6.00 atm at a constant volume of 1.00 m3 and then expands at constant pressure to a volume of 3.00 m3 before returning to its initial state as shown in the figure below. how much work is done in one cycle?
The work done on the given gas in one cycle is -405.3 kJ.
The given parameters;
initial pressure of the gas, P₁ = 2 atmfinal pressure of the gas, P₂ = 6 atminitial volume of the gas, V₁ = 1 m³final volume of the gas, V₂ = 3 m³Convert the pressure to Pascal (N/m²);
1 atm = 101325
The work done in one cycle is the area of the triangle and it is calculated as follows
[tex]Area = \frac{1}{2} \times base \times height\\\\Area = \frac{1}{2} \times (3 \ m^3\ -\ 1 \ m^3)\times (6 \ atm \ - \ 2 \ atm)\\\\Area = 4 \ atm -m^3\\\\Area = 4 \ atm -m^3 \ \times \frac{101325 \ Pa}{1 \ atm} \\\\Area = 405,300 \ m^3.Pa\\\\Area = 405,300 \ m^3. (N/m^2)\\\\Area = 405,300 \ Nm\\\\Area = 405,300 \ J\\\\Area = 405.3 \ kJ[/tex]
the net work done on the gas = - 405.3 kJ
Thus, the work done on the given gas in one cycle is -405.3 kJ.
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something about the earth's surface (land or water) changes
Bella wants to know which mode of transportation is the fastest for getting from her home to the grocery store. She can drive her car, ride her bike, walk, or charter a helicopter.
Independent variable
Dependent variable
Controlled variables
Hypothesis
Based on the question, the following applies:
Independent variable: Time Dependent variable: Mode of transportationControlled variable: Distance traveledHypothesis: IF Bella charters a helicopter, THEN she will get to the grocery store faster. VARIABLES IN AN EXPERIMENT:The following are definitions of some variables in an experiment:
Independent variable in an experiment is the variable that is altered or changed by the experimenter. Dependent variable is the variable that is measured or recorded in an experiment. Controlled variable is the variable that is kept constant or unchanged throughout the experiment.According to this question, Bella wants to know which mode of transportation is the fastest for getting from her home to the grocery store. The following are the variables in this experiment:
Independent variable: Time Dependent variable: Mode of transportationControlled variable: Distance traveledHypothesis: IF Bella charters a helicopter, THEN she will get to the grocery store faster.Learn more about experimental variables at: https://brainly.com/question/10415158
Why does the blue force have a negative sign?
-20 N
50 N
Because 50 is smaller than 20
Because 20 is smaller than 50
Because it is pointing to the left
Because it is blue
Change.
Wax melting is an example of a chemical reaction.
True or false
Saima travels 2.5 km in 21.2 seconds. What as Saima's initial speed if her final velocity is 10.7 m/s?
Answer:
d/t = (230 km)/(3.25 h) = 70.8 km/h.
Explanation:
explain the production of current with the help of a magnet and describe which device works on this phenomena
Answer:
Explanation:
The properties of magnets are used to make electricity. Moving magnetic fields pull and push electrons. ... Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.
density differences in different materials are able to change the _____________ of a wave.
Answer:
Wavelength and speed both depend on the material of the medium.
Explanation:
Let [tex]f[/tex] denote the frequency of a wave. Let [tex]v[/tex] denote the speed of that wave in a given medium. Let [tex]\lambda[/tex] denote the wavelength of that wave in this medium.
The frequency [tex]f[/tex] of a wave stays the same regardless of the material of the media. However, the speed [tex]v[/tex] of a wave indeed depends on the material of the medium (density of the medium, etc.)
[tex]\lambda = v / f[/tex] and [tex]f[/tex] stays the same regardless of the medium. Thus, the wavelength [tex]\lambda[/tex] of this wave in a given medium would be proportional to the speed [tex]v[/tex] in that medium.
For example, the speed of sound in materials with a larger density (e.g., water) is generally larger than that in materials with lower density (e.g., air.)
When a sound wave travels from air into water, the frequency [tex]f[/tex] of this wave would stay the same. However, since the speed [tex]v[/tex] of the wave would increase, the wavelength [tex]\lambda[/tex] of this wave would also increase.
1. Shelly pushes a .0035 kg marble with
a force of .07.N.
Answer:
pressure= force/area
Explanation:
pressure= 0.07/0.0035
= 20 pascal
A 1,500 kg car’s speed changes from 30 m/s to 15 m/s after the brakes are applied. Calculate the work done onto the car from the brakes.
The work done onto the car is 506,250 J
The work done on a system implies an increase in the internal energy of the system as a result of some forces acting on the system from the outside.
From the parameters given:
The mass of the car = 1500 kgThe initial speed = 30 m/sThe final speed = 15 m/sThe work done onto the car refers to the change in the kinetic energy (i.e. ΔK.E)
[tex]\mathbf{=\dfrac{1}{2} mv_1^2 -\dfrac{1}{2} mv_2^2}[/tex]
[tex]\mathbf{=\dfrac{1}{2} m(v_1^2 - v_2^2)}[/tex]
[tex]\mathbf{=\dfrac{1}{2} \times 1500 \times (30^2 - 15^2)}[/tex]
= 506,250 J
Therefore, we can conclude that the work done on the car is 506,250 J
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A container on the highway with a round hemispherical end is considered a(n) _________ pressure container.
Answer:
high pressure container
A container on the highway with a round hemispherical end is considered a(n) High-pressure container.
What is pressure ?Pressure (symbol: p or P) stands the force involved perpendicular to the surface of an object per unit area over which that force exists distributed. 445 Gauge pressure (even spelled Gage pressure) exists the pressure comparable to the ambient pressure.
Various units exist utilized to represent pressure. Some of these derive from a unit of force separated by a unit of area; the SI unit of pressure, the pascal (Pa), Pressure may also be represented in terms of standard atmospheric pressure; the atmosphere (atm) stands equivalent to this pressure, and the tore exists described as 1⁄760 of this.
Hence, A container on the highway with a round hemispherical end is considered a(n) High-pressure container.
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an astronomer looking out into space will observe that
Answer:
The farther out a galaxy is from Earth, the faster it is moving away.
Explanation:
A 50-n force is applied to a 10-kg chair, but the chair does not change its motion. What could explain this?.
Explanation:
it will not change it's motion because it's force is less than the force applied
Best definition of an electromagnetic wave?
A) an electromagnetic wave is a longitudinal wave with electricity
B) an electromagnetic wave is a mechanical wave
C) an electromagnetic wave is a transversal wave that has electrical and magnetic properties
Answer:
Longitudinal and mechanical waves require a medium to support their transmission:
C) is the correct answer
When did the objects that we now see as asteroids and comets form in the solar system?.
Answer:
After solid particles condensed from the gas but before the planets finished forming
A marble is launched at by dropping it through a marble launcher. The marble took 0.22s to land 0.31m from
where it was launched. Find the horizontal velocity of the marble as it rolls off the table.
A. 1.4m/s
B. 0.53m/s
C. 0.71 m/s
D. 0.07m/s
Hi there!
For projectile motion, the horizontal and vertical components are SEPARATE.
We can use the kinematic equation to solve:
dₓ = vₓt
We can rearrange to solve for vₓ:
dₓ/t = vₓ
0.31/0.22 = vₓ
vₓ = 1.4 m/s ⇒ A
What is the mass (in kg) of an object which accelerates at 3 m/s^2 when acted upon by a 15 N force?
[tex]\purple{\longrightarrow \sf Force = Mass \times Acceleration}[/tex]
[tex] \longrightarrow \sf Mass = \dfrac{Force}{Acceleration }[/tex]
[tex]\longrightarrow \sf Mass = \dfrac{15}{3}[/tex]
[tex]\longrightarrow \sf Mass = \cancel{\dfrac{15}{3}} [/tex]
[tex]\longrightarrow {\pink{\underline{\underline{\sf{ Mass = 5 \: Kg }}}}}[/tex]
Henceforth :-
The mass of the object is 5 kg.▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Interpreting Graphics
11. Look at the model of an atom below. Does the
model represent a metal atom or a nonmetal
atom? Explain your answer.
ng
By looking at the model shown in the problem one can clearly say that this model represents the metal because there are a total of 12 electrons revolving around the nucleus which clearly represents the Magnesium metal.
What are metalloids?The elements of the periodic tables that behave as metals, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron, silicon, germanium, arsenic, antimony, tellurium, etc.
As given in the problem, there is a graphical representation of the model of an atom,
One can see that the model in the problem accurately depicts the metal by looking at the total of 12 electrons circulating around the nucleus, which is a clear representation of the magnesium metal.
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The rate at which work is done is called
a. efficiency
b. effort time
c.
force
d. power
Please select the best answer from the choices provided
Ο Α
ОВ
ОС
Answer:
The rate at which work is done is power
