The prediction from special relativity that the length of a moving object will be shortened in the direction of motion is
a. time dilation.
b. length contraction.
c. the equivalence of mass and energy.
d. the principle of relativity.
e. none of the above.
b
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Estimate the heat loss due to natural convection from the house shown in the figure.
In the double-slit experiment with light, suppose that the light source is turned on so briefly that only a single quantum of energy passes through the double slits. When it arrives at the screen, this energy is deposited
A) all over the white interference bands that normally appear in the double-slit experiment. B) at one small point, which could be anywhere on the screen. C) at one small point within the white interference bands. D) all over one of the white interference bands. E) at one small point, lying directly behind the slit through which the energy came.
In ________ models, the Sun is assumed as the center of the solar system.
A. Heliocentric B. Epicyclic C. Anthropomorphic D. Geocentric
Is aging primarily an example of a physical or chemical change?
A) Aging is an example of a physical change since it involves our physical bodies getting older each day. B) Aging is an example of a chemical change involving the chemical reformation of our biomolecules. C) Aging cannot be classified as either a physical or chemical change. D) None of the above is true.