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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Astronomers think the Milky Way has spiral arms because
A. they can see them unwinding along the celestial equator. B. Pop II stars, hot molecular clouds, and asterisms outline spiral arms. C. globular clusters outline spiral arms. D. radio maps show that gas clouds are distributed in the disk with a spiral pattern. E. All of these choices are correct.
A single-slit diffraction pattern is formed on a distant screen. Assuming the angles involved are small, by what factor will the width of the central bright spot on the screen change if the wavelength is doubled?
A) It will be cut to one-quarter its original size. B) It will be cut in half. C) It will double. D) It will become four times as large. E) It will become eight times as large.
A runner maintains constant acceleration after starting from rest as she runs a distance of 60.0 m. The runner's speed at the end of the 60.0 m is 9.0 m/s. How much time did it take the runner to complete the 60.0 m distance?
A) 6.67 s B) 15.0 s C) 9.80 s D) 10.2 s E) 13.3 s
Which of the following is an indication that one is dealing with a wave property instead of a particle property?
a. energy c. interference b. quanta d. momentum