If an object absorbs more energy than it emits, its
A) thermal energy decreases.
B) temperature decreases.
C) both of these
D) none of the above
Answer: D
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Mineralogical analysis of a rock can tell us
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Water is sent from a fire hose at 40 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the water?
a. 7.5 m c. 15 m b. 11 m d. 20 m
An astronaut at rest has a heart rate of 65 beats/min. What will her heart rate be as measured by an earth observer when the astronaut's spaceship goes by the earth at a speed of 0.80c?
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