Power: How much energy does a 100-W light bulb use in 8.0 hours?
A. 0.0080 kWh
B. 0.80 kWh
C. 13 kWh
D. 800 kWh
Answer: B
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What do we mean by gravitational time dilation?
A) It is the idea that time runs slower in places where gravity is stronger. B) It is the idea that clocks run slow for people moving at high speed past you. C) It is the idea that everyone measures time differently, depending on his or her reference frame. D) It is the idea that clocks run faster in stronger gravitational fields.
48 grams of oxygen at room temperature consists of how many moles?
A. 3.0 B. 1.5 C. 0.75 D. more than 3.0 E. less than 0.75
The difference between a DC and an AC generator is that
a. the DC generator has one unbroken slip ring. b. the AC generator has one unbroken slip ring. c. the DC generator has one slip ring split in two halves. d. the AC generator has one slip ring split in two halves. e. the DC generator has two unbroken slip rings.
What is the coefficient of performance of a Carnot heat pump used to remove heat from ice at 0.0°C and add heat to a room at 20.0°C?
A) 14.7 B) 1.00 C) 0.00 D) 20.0 E) 293