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At what height above the earth is the free-fall acceleration 40 % of its value at...

At what height above the earth is the free-fall acceleration 40 % of its value at the surface? Assume Rearth = 6.37 × 106 m.

Express your answer to two significant figures and include the appropriate units.

What is the speed of a satellite orbiting at that height? Assume Mearth = 5.98 × 1024 kg.

Express your answer to two significant figures and include the appropriate units.

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