Assume for a moment that the earth is a perfectly uniform
sphere of radius 6400 km. Suppose a thread equal to the
length of the circumference of the earth was placed along
the equator, and drawn to a tight fit.
Now suppose that the length of the thread is increased by 12
cm, and that it is pulled away uniformly in all directions.
By how many cm. will the thread be separated from the
earth's surface?
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Answer Posted / roop anand
radius=6400000cm
circumference=2*pi*r
=2*3.14*6400000
=40192000cm
length is elongated by 12cm..
so circumference is increased br 12cm..
2*pi*r=40192000+12
=40192012cm
the new radius = 2*pi*r/2*pi
=40192000/2*(3.14)
=6400001.911
therefore the length of the distance its seperated from the
surface is = 6400001.911-640000
=1.911cm
| Is This Answer Correct ? | 3 Yes | 1 No |
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