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masha68 [24]
3 years ago
12

A CD-ROM is a compact disk that

Physics
1 answer:
lisov135 [29]3 years ago
8 0
The answer is C, A CD-ROM is a compact disk that contains stored information that can be read on a computer. which can be used and store for a long time. A CD-ROM store data in digital format. data is written from a laser light on the disk. Minimum capacity this drive is around 700 MB.
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"My distance to the center of the earth is about 4000 miles when I am on the surface. If I go to a height of 8000 miles above th
lord [1]

Given,

Distance from the surface to the center of the earth, d=4000 miles

Distance from the center to you at a height of 8000 miles, a= 8000+4000=12000 miles

The gravitational force acting on a person at the surface is equal to his weight.

From Newton's Universal Law of Gravitation, the gravitational force is

F=\frac{G\times M\times m}{r^2}

Where G is the gravitational constant, M is the mass of the earth, m is the mass of the object/person, r is the distance between the center of the earth and the object/person

At the surface, this force is equal to the weight of the person, W=mg

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F_s=\frac{G\times M\times m}{d^2}=W

On substituting the of d,

W=\frac{\text{GMm}}{4000^2}

At a height of 8000 miles from the surface, the gravitational force is equal to,

F_a=\frac{GMm}{12000^2}

On dividing the above two equations,

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Therefore,

F_a=\frac{1}{9}W

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