In an RC circuit, what fraction of the final energy is stored in an initially uncharged capacitor after it has been charging for 3.0 time constants?
A. 0.84
B. 0.90
C. 0.75
D. 0.60
E. 0.03
Answer: B
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Torque: A force of 17 N is applied to the end of a 0.63-m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque about the pivot point produced by this force?
A. 7.6 N ? m B. 10.7 N ? m C. 12.0 N ? m D. 9.7 N ? m
Escape velocity is the speed required to:
A) orbit an object. B) overcome the gravitational pull of an object. C) overtake an object in orbit and pass it. D) keep from falling out of orbit around an object. E) maintain a constant distance from an object.
The critical temperature the core must reach for a star to shine by fusion is:
A) 5,800 K. B) 11,000 K. C) 127,000 K. D) 10 million K. E) 100 million K.
Which planet's major moons were named after literary characters?
a. Jupiter b. Saturn c. Uranus d. Neptune