In the lab, a relativistic proton has a momentum of 1.00 × 10-19 kg ? m/s and a rest energy of 0.150 nJ. What is the speed of the proton in the lab? (c = 3.00 × 108 m/s, mproton = 1.67 × 10-27 kg)
A) 0.170c
B) 0.196c
C) 0.911c
D) 0.930c
E) 0.951c
B
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A series LRC ac circuit has a peak current of 1.0 A with a frequency of 54 kHz. If the resistance of the circuit is 51 k?, the capacitance of the circuit is 19 ?F, and the inductance of the circuit is 25 ?H, determine the average power of the circuit
A) 26 kW B) 77 kW C) 7.7 kW D) 4.1 kW
A stone is held at a height h above the ground. A second stone with four times the mass of the first one is held at the same height. The gravitational potential energy of the second stone compared to that of the first stone is
A) one-fourth as much. B) one-half as much. C) twice as much. D) four times as much. E) the same.
Several surprising discoveries were made as astronomers began detecting exoplanets. Which statement is correct?
A. There are terrestrial planets larger than Earth. B. Gas giants can orbit extremely close to their star. C. Some exoplanets have extremely elliptical orbits. D. All of these choices are correct. E. None of these choices are correct.
Estimate how many textbooks of 1000 pages stacked on top of each other would make a stack of books 10 feet high.
A. 60 B. 50 C. 40 D. 30 E. 20