The restoring force of a spring is proportional to the displacement of the object at the end.
Indicate whether the statement is true or false.
Ans: True.
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Carnot Engine: An ideal Carnot heat engine operates between reservoirs at 1740 K and 150 K. In each cycle, 260 J of heat energy is rejected to the low temperature reservoir. In each cycle, how much mechanical work W is performed by the engine?
Fill in the blank(s) with the appropriate word(s).
Consider the two inductors shown below (which are in independent circuits). The induced emf in each inductor is such that the inductor behaves like a battery with its positive end to the right. 
Which inductor carries the larger current?
A. Inductor 1 B. Inductor 2 C. The current or change in current is the same in both. D. One needs more information to answer the question.
At time B, is the expansion of the universe accelerating, coasting, or decelerating?
What will be an ideal response?
A tiny particle with charge + 5.0 ?C is initially moving at 55 m/s. It is then accelerated through a potential difference of 500 V. How much kinetic energy does this particle gain during the period of acceleration?
A) 1.0 × 104 J B) 2.5 × 10-3 J C) 100 J D) 2500 J