The gravitational force between two objects can be described using the equation Fg = G M1 M2 / d2. According to this equation, if the distance between two objects increases, what happens to the gravitational force between them?
A) The force increases.
B) The force decreases.
C) The force drops instantly to zero.
D) The gravitational force is not affected by distance.
B) The force decreases.
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Eta Carinae is an example of a
A) black hole. B) supermassive star. C) red dwarf. D) nebula. E) stellar nursery.
Thermal radiation is defined as
A) radiation produced by a hot object. B) radiation in the infrared part of the spectrum. C) radiation that depends only on the emitting object's temperature. D) radiation in the form of emission lines from an object. E) radiation that is felt as heat.
Only high-energy gamma rays can escape the event horizon of a black hole
Indicate whether the statement is true or false
As a body falls through air starting from rest, its acceleration
a. is zero b. stays constant c. continuously decreases d. continuously increases e. gets smaller and smaller, eventually approaching zero