Suppose you slowly lift a book from the floor and put it on a table. Which of the following energy transformations best describes the overall process?
A) kinetic to gravitational
B) kinetic to chemical
C) gravitational to chemical
D) chemical to gravitational
E) thermal to gravitational
D
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If Taurus is now rising at sunset, which constellation will rise at sunset next month?
A) Aries B) Scorpius C) Aquarius D) Gemini E) Pisces
According to the second law of thermodynamics, for any process that may occur within an isolated system, which answer applies?
A. entropy remains constant. B. entropy increases. C. entropy decreases. D. depends on the rate of change of the process.
A parallel-plate capacitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off
As the plates are being separated, the energy stored in this capacitor A) increases. B) decreases. C) does not change. D) become zero.
An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with a charge of +15 µC carefully placed at the center of the sphere through a hole in the latter's surface. What charge resides inner surface of the sphere?
a. –2 000 µC b. –15 µC c. +15 µC d. zero e. +2 000