A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two-second time. The ball is referred to at the two-second time. The velocity is __________
Fill in the blank(s) with correct word
19.6 m/s
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Deoxyribonucleic acid is better known as
a. vitamin D. b. reproductive enzymes. c. RNA d. DNA e. vitamin B12
Interstellar gas is composed of:
A) only hydrogen. B) 90% hydrogen, 9% helium by weight. C) 10% hydrogen, 90% helium by numbers of atoms. D) some hydrogen, but mainly carbon dioxide. E) ammonia, methane, and water vapor.
A Hertzsprung-Russell diagram shows stars on a plot of
A) luminosity vs. distance. B) magnitude vs. apparent brightness. C) apparent brightness vs. temperature. D) luminosity vs. temperature.
A simple series circuit consists of just a 3.4-µF capacitor and an 80-mH inductor, with no appreciable resistance. At t = 0 the capacitor has charge 5.4 µC and the current in the inductor is zero
(a) How long after t = 0 will the current in the circuit be maximum? (b) What will be this maximum current?