A circuit consists of three identical lamps connected to a battery as in Figure OQ28.14. The battery has some internal resistance. The switch S, originally open, is closed. What happens to the current in the battery?

1

Physics & Space Science

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Helium-neon laser light (l = 632.8 nm) is sent through a single slit of width 0.41 mm. What is the width of the central maximum on a screen 1.0 m in back of the slit? (1 nm = 10-9 m)

a. 5.3 mm c. 3.1 mm b. 4.2 mm d. 2.0 mm

Physics & Space Science

The fundamental difference between a protostar and a star is that the latter has nuclear fusion as its energy source and the former does not

Indicate whether the statement is true or false

Physics & Space Science

The metric prefix that means one tenth (1/10) is

a. deka b. deci c. centi d. milli e. none of these

Physics & Space Science

If two stars have the same parallax, but the brighter is magnitude +2.3, and the fainter is magnitude +3.3, then the fainter star is ________ less luminous

Fill in the blank(s) with correct word

Physics & Space Science