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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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?
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.