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: If m1 is a small asteroid approaching a planet m2 or radius R, what is...

: If m1 is a small asteroid approaching a planet m2 or radius R, what is the total collision cross section for the asteroid with the planet's surface?

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Answer #1

Solution -

Total collision cross section will be a fraction of lateral suraface area of the given planet and given by -

4* pi * R​​​​​​2 ( m​​​​​​1 / m​​​​​​2 )

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