When the midpoint of the face of the Sun appears to be on the horizon, where is the actual midpoint from the point of view of the observer?
a. above the horizon at sunrise and below the horizon at sunset
b. on the horizon
c. below the horizon
d. above the horizon
c
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A rocket is launched from the origin with an acceleration of 20.0 
at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80 
downward. What is the maximum height?
A. 22.3 m B. 27.5 m C. 30.5 m D. 36.7 m E. 20.0 m
A gas expands from an initial volume of 30.0 L to a final volume of 65.0 L at a constant pressure of 110 kPa. How much work is done by the gas during this expansion?
A) 3.85 MJ B) 3.85 kJ C) 10.4 kJ D) 3850 kJ E) 10.4 MJ
Kepler’s second law implies that as a planet’s distance from the sun increases in an elliptical orbit, its orbital speed
A. Increases. B. Decreases. C. Remains the same. D. Changes in a way we cannot determine.
Which of the following quantities has the same dimensions as kinetic energy, 
?
Note: [[a]] = [[g]] = LT?2; [[h]] = L and [[v]] = LT?1.
A. ma B. mvx C. mvt D. mgh E. mgt