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Physics, 21.12.2019 05:31 Gyalissunout3526
The concept of critical density is just like the idea of escape velocity for a projectile launched from the earth. an object launched with a velocity less than the escape velocity will fall back to the earth, and an object launched with one greater than the escape velocity can escape the earth's gravitational field. find an expression for vesc, the escape velocity of a projectile launched from the earth's surface. express your answer in terms of the universal gravitational constant g, the mass of the earth me, and the radius of the earth re.
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