RMS and Peak Quantities: The potential applied to a 20-? resistor is (60 V) cos(33t). What is the average power consumed in the resistor?
Fill in the blank(s) with the appropriate word(s).
90 W
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A soap bubble film that is 106 nm thick and has an index of refraction of 1.42 results in constructive interference in the reflected light if this film is illuminated by a beam of light with a wavelength of 601 nm
What are the next three thicknesses of this film that will also result in constructive interference? A) 53.0 nm, 35.3 nm, 26.5 nm B) 67.0 nm, 42.4 nm, 22.3 nm C) 212 nm, 424 nm, 636 nm D) 212 nm, 318 nm, 424 nm E) 318 nm, 530 nm, 742 nm
Explain why the lines of force never cross one another. (Hint: Consider the direction of a magnetic line of force.)
In the shape-memory effect in metals, the martensitic transformation must be _____________.
Fill in the blank(s) with the appropriate word(s).
In pre-Copernican astronomy, it was almost universally believed that
a. the planets traveled in elliptical orbits about Earth. b. the center of the universe was the Sun with the Milky Way representing other distant planets. c. the Sun was at the center of the universe. d. Earth was at the center of the universe. e. None of the above was believed.