In what ways might a country's nuclear power industry assist that country in obtaining nuclear weapons?
A) by enriching uranium.
B) by providing the knowledge that is essential to building nuclear weapons
C) by producing plutonium in nuclear reactors
D) All of the above.
E) Actually, there is little connection between nuclear power and nuclear weapons.
D
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A sprinter named Ben has challenged a beam of light to a race in the 100-m dash. The race is held in a stadium full of spectators. At the start signal, a laser beam is turned on at the start line, pointed down the track. At the same instant, Ben bursts out of the starting blocks at 99% of the speed of light (0.99c). According to Ben, what happens?
A) The light beam moves out ahead of him at the full speed of light, winning the race easily. B) The light beam gradually pulls ahead of him and wins the race because it is going 1% of the speed of light faster than him. C) The light beam instantly finishes the race, before Ben even has a chance to start. D) Ben wins the race and becomes a hero.
Bulbs A, B, C, and D are identical and connected to a battery as shown. The bulb with the least current passing through it is
A. bulb C. B. bulb A. C. both bulbs A and B. D. both bulbs C and D.
What do we mean by the interstellar medium?
A) the gas and dust that lies in between the stars in the Milky Way galaxy B) the dust that fills the halo of the Milky Way galaxy C) the middle section of the Milky Way galaxy D) the name of an oracle who can channel messages from beings that live near the star called Vega
During the first 5 seconds after a ball is dropped from rest, how far will it fall?
A. 122.5 m B. 61.3 m C. 245 m D. 490 m E. 25 m