In a spectroscopic binary system, the star showing the larger blue shift is
A) cooler and receding the fastest.
B) less massive of the pair and receding slower.
C) more massive and approaching us.
D) less massive and approaching us at this moment.
E) hotter and receding faster.
D
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A piece of iron rests on top of a piece of wood floating in a bathtub. If the iron is removed from the wood, and kept out of the water, what happens to the water level in the tub?
A) It goes up. B) It goes down. C) It does not change. D) It is impossible to determine from the information given.
A 160 lb person has a mass of 160/32 = 5 slugs. A 160 lb person steps into an elevator and stands on a bathroom scale. Determine the scale reading for the given scenarios. The elevator cable breaks
a. 150 lb c. 170 lb b. 160 lb d. none of the above
A test rocket is fired straight up from rest with a net acceleration of 20.0 m/s2. After 4.00 seconds the motor turns off, but the rocket continues to coast upward with no appreciable air resistance
What maximum elevation does the rocket reach? A) 327 m B) 487 m C) 160 m D) 408 m E) 320 m
Given that the planet orbiting the nearby star 51 Pegasi is about 20X larger than the Earth, but 400X more massive, on that world you would weigh:
A) the same as you do here. B) twice as much as you do here. C) half as much as you do here. D) 20X more that you do here. E) 400X more than you do here.