Neptune Has a Mass of 1

question 54

Multiple Choice

Neptune has a mass of 1.0*10²⁶ kg and a radius of 25,000 km.What is the escape velocity of Neptune? [This question requires the use of mathematics.The value of the gravitational constant is 6.67*10^-11 Nt m² kg^-2.]

• A) 17 km/sec
• B) 7.5 km/sec
• C) 23 km/sec
• D) 7.3*10⁵ km/s
• E) 8.9*10¹⁰ km/s

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