The mean diameters of X and Y, two planets in the same solar system, are 6.6 103
ID: 1459670 • Letter: T
Question
The mean diameters of X and Y, two planets in the same solar system, are 6.6 103 km and 1.0 104 km, respectively. The mass of X is 0.15 times the mass of Y. The value of g on Y is 8.1 m/s2.
(a) What is the ratio of the mean density of X to that of Y?
X/Y = 5.21746
Incorrect: Your answer is incorrect.
(b) What is the value of g on X? 2.79 m/s^2
Correct: Your answer is correct.
(c) The mass of Y is 3.036 1024 kg. What is the escape speed on X? 18414 m/s
Incorrect: Your answer is incorrect.
Can anyone help me with part (a) and (c)?
Explanation / Answer
(c)v escape=sqrt 2GM/r
MX=0.15MY
v=4290.594m/sec
(a)density ratio=5.2169*10-7
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