The output voltage of an AC generator is of the form V = V0 sin(2?ft). A typical frequency in household circuits is 60 Hz. Using radians for angular measure in this equation, what is the factor 2?f in radians per second for this frequency?
a. 2? b. 120
c. 377 d. 60
c
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An electron which moves from the negative to the positive terminal of a 2.0 volt battery loses how much potential energy?
A) 2.0 J B) 4.2 × 10-19 J C) 2.0 × 10-19 J D) 2.0 eV E) 3.2 J
Why does light come in different colors?
a) differences in the wavelength b) it travels at different speeds c) warping of space it travels through d) differences in intensity of radiation e) bending of light in space
An object is accelerating if it moves
1) with constant velocity 2) in a circular path 3) in a straight-line path because it is undergoing a change in its 4) speed. 5) direction. 6) net force.
Detonation of a fission-type uranium bomb begins by
A) splitting uranium. B) pressing together pieces of uranium. C) igniting a small conventional bomb. D) all of the above E) none of the above