The bombs used against Japan were
A) two plutonium bombs.
B) two fusion bombs.
C) two uranium bombs.
D) an fission bomb and a fusion bomb.
E) a uranium bomb and a plutonium bomb.
E
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A horizontal force is applied to a 2.0 kg box. The box starts from rest, moves a horizontal distance of 12.0 meters, and obtains a velocity of 8.0 m/s. The change in the kinetic energy is
A. 32 J. B. 48 J. C. 50 J. D. 58 J. E. 64 J.
Alien astronomers are using the radial-velocity method to look for planets around our Sun. Which planet are they most likely to detect first?
A. Jupiter B. Neptune C. Mercury D. Earth
The atmospheric condition at a particular location at a particular moment in time is called
A) weather. B) climate. C) average temperature. D) average precipitation level.
Excited atomic states that last for a relatively long time are called
A. laser states. B. metastable states. C. amplification states. D. radiation states. E. cascading states.