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An asteroid is located 5.0×10^7 km from Earth and has a speed of 4.0 km/s, headed...

An asteroid is located 5.0×10^7 km from Earth and has a speed of 4.0 km/s, headed directly for us. What will the speed of the asteroid be just as it hits our atmosphere? Use two sig figs, and give your answer in units of km/s.

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