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never [62]
3 years ago
13

Which f the following are true for gravity

Physics
1 answer:
alisha [4.7K]3 years ago
6 0

Answer:

Explanation:

number A

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If the only force exerted on a star far from the center of the Galaxy (r = 7.40 ✕ 1020 m) is the gravitational force exerted by
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Answer:

The value is  v = 1.309*10^{5}\ m/s

Explanation:

The radius is r = 7.40 *10^{20} \  m

The mass of the ordinary matter is M_{rod} =  1.90 *10^{41}\  kg

Generally the speed of the star is mathematically represented as

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So

      v = \sqrt{\frac{6.67384 * 10^{-11} * 1.90 *10^{41}}{7.40 *10^{20}} }

=>    v = 1.309*10^{5}\ m/s

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2 years ago
Imagine you have been asked to create an experimental design to test the hypothesis that talking on a cell phone impairs driving
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Why do areas with low altitude have warmer air than areas with high altitude
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Air at higher altitude is under less pressure than air at lower altitude because there is less weight of air above it, so it expands (and cools), while air at lower altitude is under more pressure so it contracts (and heats up).

Explanation:

Hope that helped

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What happened to the kinetic energy when the velocy of a moving body is doubled?​
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