When a 12-V battery powers a single 6-ohm lamp,
A) 2 joules flow in the lamp each second.
B) 6 joules flow in the lamp each second.
C) 12 joules flow in the lamp each second.
D) none of the above
Answer: C
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What change slowly occurs during the main-sequence lifetime of a star?
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a. 72 b. 25 c. 33 d. 100 e. ?33
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a. provides the accelerating force that makes the car move forward. b. does positive work on the car while it is accelerating. c. does negative work on the car while it is decelerating. d. does everything listed in (a), (b) and (c). e. only does positive or negative work as in (b) or (c).