Nineteenth-century scientists thought the "ether" to be
A) the cause of the gravitational force.
B) the medium for the propagation of light waves.
C) the medium for the propagation of sound waves.
D) All of the above.
E) None of the above.
B
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The densest, coldest clouds are called _____________
a. reflection nebula b. dark nebula c. Bok globules d. molecular clouds
Astronomers have found the center of the Universe to be located in
a. Earth b. the Sun c. Sagittarius A d. the Virgo Cluster of galaxies e. no center is thought to exist.
When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be the same in each side of the rope when
A) the lengths of rope on each side are different. B) the angles at each side of the rope are unequal. C) she is in equilibrium. D) none of the above
If you were a parallel plate capacitor manufacturer, state three ways you might make larger valued capacitors
What will be an ideal response?