please help me woth this question The mean diameters of X and Y, two planets in
ID: 1448960 • Letter: P
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please help me woth this question
The mean diameters of X and Y, two planets in the same solar system, are 6.8 times 10^3 km and 1.8 times 10^4 km. respectively. The mass of X is 0.15 times the mass of Y. The value of g on Y is 8.1 m/s^2. What is the ratio of the mean density of X to that of Y (rho_x/rho_y)? What is the value of g on X? m/s^2 The mass of Y is 9.837 times 10^34 kg. What is the escape speed on X? m/s Density is the ratio of mass to volume. Do you recall how to calculate the volume of a sphere? The gravitational acceleration is the ratio of the gravitational force on a particle to the particle's mass. The escape speed is the speed when the escape kinetic energy equals the magnitude of the initial gravitational potential energy.Explanation / Answer
escape speed Ve = sqrt(2*GM/r)
M = mass of planet X = 0.15*9.83*10^24
r = radius of planetx = 3.4*10^6 m
G = 6.67*10^-11
Ve = sqrt((2*6.67*10^-11*0.15*9.83*10^24)/(3.4*10^6))
Ve = 76066.1 m/s <<<<-------answer
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