You are a passenger on a spaceship. As the speed of the spaceship increases, you would observe
A) your watch slowing down.
B) your watch speeding up.
C) your watch losing time.
D) your watch gaining time.
E) nothing unusual about your watch.
E
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How many calories of heat are required to raise the temperature of 4 kg of water from 50°F to the boiling point?
a. 6.5 × 10^5 b. 3.6 × 10^5 c. 15 × 10^5 d. 360 e. 4 × 10^4
A heat engine
a. converts heat to work. b. converts heat to internal energy. c. transfers heat from a low-temperature reservoir. d. converts work to heat.
Suppose the pressure of 20 g of an ideal monatomic gas is tripled while its volume is halved. What happens to the internal energy of the gas?
a. It stays the same, as the described changes do not involve internal energy. b. It increases. c. It decreases. d. This depends on the molecular weight of the gas involved, thus this is indeterminate.
A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view
A) The dog is following the areas of increased density of the Earth. B) The dog is smelling atoms from the cat. C) The dog is smelling molecules from the cat. D) The cat is leading the dog into a trap.