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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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
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.
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.