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Body A has a mass of 1027 kilogram. The central star has a mass of 1030...

Body A has a mass of 1027 kilogram. The central star has a mass of 1030 kilogram. The average distance between the central star and Body A is 5.2 AU (Astronomical Unit). The Solar Luminosity of the central star is 1026 W. In this hypothetical universe, the Stefan-Boltzman constant is 10-8 W m-2 K-4. (this is all the information I was given)

What is the minimum velocity of an object hitting Body A? A spherical asteroid with a radius of 50 km and a density of 5000 kg m-3 just struck Body A with this minimum velocity. How much energy is delivered to Body A?

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