According to Newton, when the distance between two interacting objects doubles, the gravitational force is
A) half.
B) one-quarter.
C) the same.
D) twice as much.
E) four times as much.
Answer: B
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A radio galaxy whose lobes are swept back as if forming a tail. This probably indicates that:
A) this is evidence for intergalactic matter. B) the galaxy is about to evolve into a spiral. C) the galaxy is isolated, not part of a cluster. D) the galaxy is moving towards Earth. E) there must be another galaxy nearby.
What would Jupiter have needed to have become a star?
A) more moons B) more mass C) a slower rotation, like the Sun D) a different chemical composition E) a higher density
Hydrocarbons are first divided into aromatic and ______________ hydrocarbons
Fill in the blank(s) with correct word
You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 4 cm wide but 7 mm high. You must move your hand up and down once,
A. the same distance up as before, but take a shorter time. B. the same distance up as before, but take a longer time. C. a smaller distance up, but take a shorter time. D. a greater distance up, but take a longer time. E. a greater distance up, but take the same time.