Kim is in a spaceship moving past you at half the speed of light. Which of the following correctly describes how you will perceive each other's time?
A) You will say that Kim's time is running slow, and she will say that your time is running slow.
B) You will say that Kim's time is running slow, and she will say that your time is running fast.
C) You will say that Kim's time is running fast, and she will say that your time is running slow.
D) You will both agree that time runs at the same rate for both of you.
A) You will say that Kim's time is running slow, and she will say that your time is running slow.
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The reason that small planets tend to lose interior heat faster than larger planets is essentially the same as the reason that
A) a large baked potato takes longer to cool than a small baked potato. B) gas bubbles form and rise upward in boiling water. C) Earth contains more metal than the Moon. D) thunderstorms tend to form on hot summer days.
Find the momentum and speed of a proton whose kinetic energy equals its rest energy. (The mass of a proton is 938.3 MeV/c2)
The "R-value" of material is not related to its ________
a. composition b. area c. thickness d. resistance to heat flow
The only force acting on a 1.8-kg body as it moves along the x axis is given by Fx = -(3.0x) N, where x is in m. If the velocity of the body at x = 0 is vx = +8.0 m/s, at what value of x will the body have a velocity of +4.0 m/s?
a. 5.7 m b. 5.4 m c. 4.8 m d. 4.1 m e. 6.6 m