What is the kinetic energy of a 1 kilogram ball is thrown into the air with an initial velocity of 30 m/sec
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A man carries a 12-kg chair up one flight of stairs to the second floor of his house. If the second floor is 3.3 m above the first floor, what is the change in the gravitational potential energy of the chair? a - 180 J b + 390 J c + 180 J d - 390 J e zero
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Answer:
150 I would believe that it is the correct answer
B- magnetic generator
C- magnetic field
D- magnetic charge
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Answer:
S = t^3 - 9 t^2 + 18 position of particle
V = dS / dt = 3 t^2 - 18 t speed of particle at time t
V = 3 * 4^2 - 18 * 4 = 48 - 72 = - 24 ft/sec
wave
vacuum
medium
PLZ help me!
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Answer: wave
Explanation:
These are the basic definitions and characteristic of the terms given, which show tha the only rigth answer is the second option: wave.
1) Force is an interaction. There are four natural forces: electrostatic, gravity, strong nuclear force and weak nuclear force.
2) Wave: is a sequence of pulses or vibrations that cause the continuous transportation of energy (propagation). There is not transport of mass, only energy.
Some examples of waves are sound waves, electromagnetic waves (light, radio waves, micro waves, infrarred waves, ultraviolet waves).
3) Vacuum: is the absence of matter; empty space. Only electromagnetic waves can travel through vacuum; other waves need a medium to travel.
4) Medium: any matter is a medium: a solid, the air, a liquid, all of them are media through which waves can transport its energy, depending of the wavelength.
An example of this is conduction of thermal energy, for instance when you heat up a saucepan the metal areas of the pan not touching the heat source still heat up due to waves of thermal energy (conduction)
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Where m = mass of body, a = acceleration.
F = ma = m(v - u)/t
So for an acceleration to occur, a force is required.
Also a change of velocity is required for acceleration to occur.
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Answer:
Option (2): Sixteen times the first cube
Explanation:
When the linear dimensions of a solid are multiplied by ' R ', the surface area of all or any part of it increases by R² , and the volume of all or any part of it increases by R³ .
If the sides of the second cube are 4 times the sides of the first one, then the second cube has (4²) = sixteen times the surface area of the first one (2), and it has (4³) = 64 times the volume of the first one.