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The initial velocity v(i) required to pr...

The initial velocity `v_(i)` required to project a body vertically upward from the surface of the earth to reach a height of 10R, where R is the radius of the earth, may be described in terms of escape velocity `v_(e )` such that `v_(i)= sqrt((x)/(y)) xx v_(e )`. The value of x will be __________ .

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