A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 ? and C = 300 ?F. The power factor, cos ?, is
a. ?1.00.
b. ?0.749.
c. +0.749.
d. +0.834.
e. +1.00.
c
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The ____________________ is a measure of the finest detail that can be seen in an image
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You will see that the Universe is almost 14 billion years old. That means that we see the most distant galaxies as they were when the Universe was:
A.) A few thousand years old. B.) 1-2 million years old. C.) 1-2 billion years old. D.) 4-6 billion years old. E.) 13 billion years old.
A mass vibrates back and forth from the free end of an ideal spring (k = 20. N/m) with an amplitude of 0.25 m. What is the maximum kinetic energy of this vibrating mass?
A) 2.5 J B) 1.3 J C) 0.63 J D) 5.0 J E) It is impossible to give an answer since kinetic energy cannot be determined without knowing the object's mass.
The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is ______________
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