Which of the following is not one of the ways sound can be used?
a. to circulate the refrigerant in a refrigerator
b. to relay information to orbiting satellites
c. to form images of internal organs
d. to measure the air temperature aloft
e. to make a bubble in water produce light
B
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A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 ? and L = 10.0 mH. The impedance is
a. 3.77 ?. b. 9.26 ?. c. 10.0 ?. d. 10.7 ?. e. 13.8 ?.
A charged capacitor is connected to an inductor to form an LC circuit with a frequency of oscillation f = 1.6 Hz. At time t = 0 the capacitor is fully charged
At a given instant later the charge on the capacitor is measured to be Q = 3 ?C and the current in the circuit is equal to 75 ?A. What is the maximum charge of the capacitor? A) 6 ?C B) 10 ?C C) 8 ?C D) 2 ?C E) 4 ?C
If an object has twice as much mass as another, then it also has twice as much
1) acceleration. 2) weight. 3) center of gravity. 4) area. This is because 5) of inertia. 6) mass and weight are directly proportional to each other. 7) the gravitational force acting on all objects in the same locality is the same.
If the collision is elastic, how many equations of constraint do we have on those quantities?
A. Zero B. One C. Two D. Three E. Four