Three devices that use electromagnetic induction in their operation are __________, __________, and __________
Fill in the blank(s) with correct word
generators, transformers, dynamic microphones, regenerative brakes
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When a spinning object changes its size, its rotation rate
A. remains the same. B. always decreases. C. always increases. D. increases or decreases, depending on whether it shrinks or expands.
Ground-based observations can be made easily in the ________ part(s) of the spectrum.
A. ultraviolet and visible B. infrared C. radio and ultraviolet D. radio and visible
Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
a. 20° b. 60° c. 32° d. 64° e. 15°
If bulb C were unscrewed: _________
a. bulb A and bulb B would be equally bright. b. bulb A would be brighter than bulb B. c. bulb A would be dimmer than bulb B. d. bulb A would go out. e. bulb B would go out.