When comparing product nuclei to reactant nuclei in an exothermal nuclear fusion process, which has the greater binding energy per nucleon?
a. greater in product nuclei
b. greater in reactant nuclei
c. equal in both product and reactant nuclei
d. None of the above choices are valid.
a
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When did the heavy bombardment end?
A) about 4.5 billion years ago B) between about 4.3 and 4.5 billion years ago C) between about 3.8 and 4.0 billion years ago D) exactly 3.95 billion years ago
This figure is a diagram of a multiflash image of an air puck moving to the right on a horizontal surface. The images sketched are separated by equal time intervals, and the first and last images show the puck at rest. In figure b, which color graph best shows the puck’s position as a function of time?
A person weighting 700 N stands in the middle of an otherwise empty 4 m x 5 m x 3 m room. How does the weight of the person compare with the weight of the air (the density of air is 1.29 kg/m3 ) in the room?
A) The weight of the air is much more than the weight of the person. B) The weight of the air is about the same as the weight of the person. C) The weight of the air is much less than the weight of the person. D) It makes no sense to speak of weight for a gas like air.
The__________of a lens or mirror is the distance from that lens or mirror to the point where it focuses parallel rays of light
A) image distance B) focal length C) radius of curvature D) object distance