An alternate equation for power in an electric circuit is P = IR
a. True
b. False
Indicate whether the statement is true or false
False
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Which of the following is a reason why the Ptolemaic model was the accepted model of the Universe?
A) It was a very good predictor of planet positions. B) The authority of Aristotle was immense. C) It proved that the Sun was at the center of the Universe. D) The multiple revisions to the model made it completely accurate.
If y = 0.02 sin (30x ? 400t) (SI units), the angular frequency of the wave is
a. 30 rad/s. b. 30/2? rad/s. c. 400/2? rad/s. d. 400 rad/s. e. 40/3 rad/s.
Suppose that two stars are identical in every way—for example, same distance, same mass, same temperature, same chemical composition, and same speed relative to Earth—except that one star rotates faster than the other
Spectroscopically, how could you tell the stars apart? A) The faster rotating star has wider spectral lines than the slower rotating star. B) The faster rotating star will have an emission line spectrum while the slower rotating star will have an absorption line spectrum. C) The peak of thermal emission will be at a shorter wavelength for the faster rotating star than for the slower rotating star. D) There is no way to tell the stars apart spectroscopically, because their spectra will be identical.
Find the pressure in atmospheres in the water at the base of Dworshak Dam if the water in the reservoir is 200 meters deep. (1.01 × 10^5 N/m2 = 1 ATM.)
a. 20.4 ATM b. 24.7 ATM c. 29.4 ATM d. 194 ATM e. 75 ATM