Stacy (S) and David (D) are having a tug-of-war by pulling on opposite ends of a 5.0 kg rope. Stacy pulls with a 15. N force. What is David's force if the rope accelerates toward Stacy at 2.0 m/s2?
A) 25 N
B) 5 N
C) 50 N
D) 3 N
E) 15 N
B
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Where did most elements heavier than hydrogen and helium come from?
A) They were produced in the Big Bang. B) They evolved from hydrogen and helium shortly after the Big Bang. C) They were produced by stars. D) They were produced inside interstellar gas clouds. E) all of the above
When a solid melts, energy is
A) absorbed by the solid. B) released by the solid. C) both of these D) neither of these
A particle starts from the origin at t = 0 with a velocity of 6.0
m/s and moves in the xy plane with a constant acceleration of 
m/s2. At the instant the particle achieves its maximum positive x coordinate, how far is it from the origin?
A. 36 m B. 20 m C. 45 m D. 27 m E. 37 m
How will the wavelength of light from a distant star change if it is experiencing a large red shift?