What is the principal difference between a hydrogen bomb and a uranium bomb?
A) A uranium bomb is an atomic bomb, and a hydrogen bomb is a nuclear bomb.
B) A uranium bomb utilizes a fission reaction whereas a hydrogen bomb utilizes a fusion reaction.
C) Both work on the same principle, but the hydrogen bomb has a higher yield.
D) A hydrogen bomb converts mass into energy, whereas a uranium bomb does not.
E) One results in radioactive fallout, and the other does not.
B
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Consider a uniform solid sphere of radius R and mass M rolling without slipping. Which form of its kinetic energy is larger, translational or rotational?
A) Its translational kinetic energy is larger than its rotational kinetic energy. B) Its rotational kinetic energy is larger than its translational kinetic energy. C) Both forms of energy are equal. D) You need to know the speed of the sphere to tell.
A ball is thrown at an original speed of 8.0 m/s at an angle of 35° above the horizontal. If there is no air, what is the speed of the ball when it returns to the same horizontal level?
A) 4.0 m/s B) 8.0 m/s C) 16 m/s D) 9.8 m/s
Electron diffraction shows
a. that electrons behave like waves b. the photoelectric effect c. characteristic x ray spectra d. that electrons in atoms have only certain allowed energies
In the searches so far, only about 1 in 10 stars show evidence for planets around them
Indicate whether the statement is true or false