During an isothermal process, 5.0 J of heat is removed from an ideal gas. What is the change in internal energy?
A. zero
B. 2.5 J
C. 5.0 J
D. 10 J
A. zero
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The force that acts between a pair of electrically-charged particles depends on
A) magnitude of charge. B) separation distance. C) both of these D) neither of these
Refer to the graph. For the entire motion, the average velocity is
A. positive. B. negative. C. zero (it is not moving). D. It is not possible to tell from the graph
Which of the following is an assumption rather than a prediction of Einstein's special theory of relativity?
A) the constancy of the speed of light B) No material object can reach or exceed the speed of light. C) time dilation D) the equivalence of mass and energy E) length contraction
In which stage of a star's evolutionary cycle does it spend the most time?
A. the post-main sequence B. the pre-main sequence C. the main sequence D. It depends on the mass of the star.