If 64 coulombs flow along a wire in 4.0 seconds, what is the average current?
A. 64 A
B. 32 A
C. 16 A
D. 4.0 A
E. none of these choices are correct
C. 16 A
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When water is turned on in a shower, the shower curtain moves towards the water spray. This partly involves
A) capillary action. B) surface tension. C) pressure changes in moving fluids. D) none of the above
Before the decoupling
A) the Universe was transparent to radiation. B) the Universe was opaque to radiation. C) protons and electrons combined to form atoms. D) there was more helium than hydrogen. E) deuterium produced electrons and positrons.
A lunar month is about 28 days. If the Moon were closer to Earth than it is now, the lunar month would be
A) more than 28 days. B) unchanged at 28 days. C) less than 28 days.
When the alignment of the Sun, the Moon, and Earth produce a solar eclipse, the body between the other two is the
A) Sun. B) Moon. C) Earth.