A photon absorbed by an electron will give up more energy to the electron if the photon:
a. is not spread out over many electrons.
b. is moving faster.
c. is moving slower.
d. has a higher frequency.
d
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LR Circuits: A simple series circuit contains a 6.0-? resistor, an ideal 15-V DC power supply, and an 18-H inductor. What the time constant of this circuit?
A. 110 s B. 3.0 s C. 0.33 s D. None of the given answers are correct.
Which of these gets so bright as to be seen in daylight at times?
A) Venus B) Jupiter C) Mars D) Saturn E) Mercury
Enrico Fermi was
A) the head of the program to develop the world's first fission bomb. B) the head of the program to develop the world's first fusion bomb. C) the inventor of radiation therapy. D) the discoverer of nuclear fission. E) the head of the program to develop the world's first nuclear reactor.
A 4.0-kg block is pushed up a 36° incline by a force of magnitude P applied parallel to the incline. When P is 31 N, it is observed that the block moves up the incline with a constant speed. What value of P would be required to lower the block down the incline at a constant speed?
a. 27 N b. 15 N c. 13 N d. 17 N e. 19 N