The number of cycles of a periodic process that occur per unit time is called
a. amplitude
b. frequency
c. period
d. wavelength
e. speed
B
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The amount of current in an incandescent bulb rated 75W 120V is about
A) 0.4 A. B) 0.6 A. C) 1.2 A. D) more than 1.2 A.
A pendulum clock uses a simple pendulum as its timing device. The clock is correct at noon. The next day, when the clock reads noon, the actual time is 11:50 a.m
What is the fractional change in pendulum length that must be made so the clock runs at the correct rate? A) 1.40% longer B) 16.7% longer C) 0.699% longer D) 0.699% shorter E) 2.84% longer
A 1938 nickel has a diameter of 21.21 mm, a thickness of 1.95 mm, and weighs 0.04905 N. What is its density?
A) 1.37 × 10-4 kg/m3 B) 1.82 × 103 kg/m3 C) 19.3 × 103 kg/m3 D) 3.63 × 103 kg/m3 E) 7.26 × 103 kg/m3
Given the following energy profiles, which of the following reactions is endothermic?
A) a B) b C) c D) d E) none of the above