If the distance between Body A and Body B is tripled, then the gravitational force between the two bodies is halved
a. True
b. False
Indicate whether the statement is true or false
False
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Molecules in a region of expanding air more often collide with neighboring molecules that are
A) approaching. B) receding. C) nearly out of range.
Venus spins faster than any other terrestrial planet.
Answer the following statement true (T) or false (F)
A wire of diameter 1.0 mm and length 3.5 m stretches 3.5 mm when 8.0 kg is hung from it
(a) What is the Young's modulus for the wire? (b) What is the effective spring constant for the stretching wire?
What evidence supports the idea that a collision between two spiral galaxies might lead to the creation of a single elliptical galaxy?
A) observations of some elliptical galaxies surrounded by shells of stars that probably formed from stars stripped out of smaller galaxies B) the fact that elliptical galaxies dominate the galaxy populations at the cores of dense clusters of galaxies C) observations of some elliptical galaxies with stars and gas clouds in their cores that orbit differently from the other stars in the galaxy D) observations of giant elliptical galaxies at the center of dense clusters that may have grown by consuming other galaxies E) all of the above