Planet X-39 Has a Mass Equal to 1/3 That of Earth

question 24

Multiple Choice

Planet X-39 has a mass equal to 1/3 that of Earth and a radius equal to 1/3 that of Earth.If V is the escape speed for Earth,what is the escape speed for X-39?

• A)V
• B)3V
• C)6V
• D)V/9
• E)9V

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