What is the planets radius

Reference no: EM13321332

You have been visiting a distant planet. Your measurements have determined that the planet's mass is two times that of earth but the free-fall acceleration at the surface is only one-fourth as large.

a) What is the planet's radius?

b) To get back to earth, you need to escape the planet. What minimum speed does your rocket need?

Reference no: EM13321332

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