Someone in Earth's rest frame says that a spaceship's trip between two planets took 10.0 y, while an astronaut on the space ship says that the trip took Find the speed of the spaceship in terms of the speed of light
A) 0.779c
B) 0.687c
C) 0.975c
D) 0.384c
Answer: A
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A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.19, at what rate does the box accelerate down the slope?
A) 4.7 m/s2 B) 5.2 m/s2 C) 5.5 m/s2 D) 6.2 m/s2
The meson having which of the following quark contents is electrically neutral?
A. 
B. 
C. 
D. 
E. 
Rays with the shortest wavelengths have the
A) highest frequencies and energies. B) lowest frequencies and energies. C) lowest frequencies but highest energies.
What is the giant impact hypothesis for the origin of the Moon?
A) The Moon originally was about the same size as Earth, but a giant impact blasted most of it away so that it ended up much smaller than Earth. B) The Moon formed just like the Earth, from accretion in the solar nebula. C) The Moon formed when two gigantic asteroids collided with one another. D) The Moon formed from material blasted out of the Earth's mantle and crust by the impact of a Mars-size object.