The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates must
A) increase.
B) decrease.
C) remain constant.
D) There is no way to tell from the information given.
B
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What causes the outward gas pressure that balances the inward pull of gravity in a main-sequence star?
a. the rapid outward flow of gas b. the rapid inward flow of the gas c. the high temperature of the gas d. the high density of the gas e. the high temperature and the high density of the gas
Graphical Analysis: The motion of a particle is described in the velocity vs. time graph shown in the figure. 
Over the nine-second interval shown, we can say that the speed of the particle
A. only increases. B. only decreases. C. increases and then decreases. D. decreases and then increases. E. remains constant.
The second law of thermodynamics states that
A) energy cannot be created or destroyed B) matter cannot be crated or destroyed C) the energy in a system undergoes changes that lead to increasing disorder D) the energy in a system undergoes changes that lead to increasing complexity
0.00325 × 10-8 cm can also be expressed in mm as
A) 3.25 × 10-12 mm. B) 3.25 × 10-11 mm. C) 3.25 × 10-10 mm. D) 3.25 × 10-9 mm. E) 3.25 × 10-8 mm.