Saturn is noticeably oblate because:
A) it has strong magnetic fields that deform its shape.
B) its powerful gravity acts stronger on the closer poles than the distant equator.
C) it is a fluid body that is spinning rapidly.
D) it is tidally distorted by the pulls for its satellite system.
E) All of the above are correct.
C
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When a loaf of bread is compressed, its
A) molecules decrease in size. B) density decreases. C) density increases. D) none of the above
A refracting telescope has a magnification M. If the focal length of the objective lens is doubled and the eyepiece focal length is halved, what is the new magnification?
A) 4M B) 2M C) M/2 D) M/4 E) M
A one-way mirror works because of
a. interference b. diffraction c. its surfaces being half-silvered d. dispersion e. polarization