In a heat pump,
a. heat is used to do work.
b. heat flows spontaneously.
c. the same process is used as in a heat engine.
d. work is used to transfer heat.
d
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The formula for the Schwarzschild radius of a black hole of mass M is:
Rs = 3 × km What is the Schwarzschild radius of a 100 million-solar-mass black hole? A) 3 km B) 30 km C) 3000 km D) 300 million km E) 3 million km
As a system loses the ability to do work, its entropy decreases
Indicate whether the statement is true or false
A race car traveling at a constant speed of 50 m/s drives around a circular track that is 500 m in diameter. What is the magnitude of the acceleration of the car?
A) 0 m/s2 B) 1.0 m/s2 C) 10 m/s2 D) 0.63 m/s2 E) 2.2 m/s2
Saturation and condensation are more likely to occur on a
A) cold day. B) warm day. C) windy day. D) balmy day.