jellybooooo7446
28.07.2019 •
Chemistry
Plz hurry the star betelgeuse is 20 times more massive than the sun. what would be the likely impact on the motion of earth if the sun were replaced by betelgeuse? a)orbital radius would increase because the gravitational pull would decrease. b)orbital radius would decrease because the gravitational pull would increase. c)orbital velocity would decrease because the gravitational pull would increase. d)orbital velocity would increase because the gravitational pull would decrease.
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Ответ:
B: Orbital radius would decrease because the gravitational pull would increase.
The gravitational force depends on the mass of the two bodies and the square of the distance between them. If the sun is replaced by Betelgeuse which is twenty times heavier, it would exert 20 times greater force on the Earth. Hence, it would pull the Earth closer. This would change its present orbit. The orbit would decrease.
Therefore, the right option is B: Orbital radius would decrease because the gravitational pull would increase.
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