A 100-W resistance heater is connected to a 110-V dc source. What is the current through the heater?

A) 1.1 A
B) 2.2 A
C) 3.3 A
D) 4.4 A
E) 0.91 A


E

Physics & Space Science

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In the context of giant stars, helium fusion produces _____ that accumulate in an inert core

A) nitrogen and carbon B) hydrogen and neon C) oxygen and neon D) carbon and oxygen

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Which of the following kinds of stars is most dense?

a. a supergiant star b. a main sequence star c. a giant star d. a white dwarf e. the sun

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In a double slit experiment, the intensity of light at the center of the central bright fringe is measured to be 6.2 µW/m2

What is the intensity halfway between the center of this fringe and the first dark band, assuming that the small-angle approximation is valid? A) 6.2 µW/m2 B) 3.1 µW/m2 C) 4.7 µW/m2 D) 1.6 µW/m2 E) 0.12 µW/m2

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The impact of meteorites on the Moon has caused

a. craters only. b. rays only. c. rills only. d. both rays and craters.

Physics & Space Science