There is a 10-A current through a wire for 2.0 min. (e = 1.60 × 10-19 C)
(a) How much charge has passed through this wire?
(b) How many electrons have passed any point in the wire?
(a) 1200 C (b) 7.5 × 1021
Physics & Space Science
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The Lyman series lines of hydrogen all lie in the infrared
a. True b. False Indicate whether the statement is true or false
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Why is the Moon heavily cratered but Earth is not?
What will be an ideal response?
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The closest star to the Sun is named
a. Polaris. b. Sirius. c. Betelgeuse. d. Proxima Centauri.
Physics & Space Science
Light enters a substance from air at an angle of 32.0°, and continues at an angle of 23.0°. What is the index of refraction of the substance?
A) 0.74 B) 1.11 C) 1.28 D) 1.36 E) 1.52
Physics & Space Science