To increase the force of gravity between two masses by a factor of 9, how would the objects have to be moved?
3 times closer together
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One reason the planets near the Sun are composed mainly of rock and iron may be that
A. the Sun is made mostly of iron, so the planets nearest it are formed of iron. B. the Sun's heat made it difficult for ices and gases to condense near it. C. the Sun's gravity sucked in iron and heavy material and the lighter materials floated farther away. D. the Sun's magnetic field attracted all the iron into the region around the Sun.
An object of mass 20.0 kg is lifted vertically through 1.00 m by a 400 N force. How much work is done by the net force in lifting this object? Use g = 10.0 m/s2
A) 20.0 J B) 40.0 J C) 100 J D) 200 J E) 400 J
The ________ is the spherical outer portion of the Galaxy, including the orbits of the globular clusters and most dark matter
Fill in the blank(s) with correct word
Is it possible to remove heat energy from a substance and not change its temperature? Explain, and give an example