Question
what is the answer for the bottom 2 questions ? 12 and 13
The escape velocity of a bullet from the surface of planet Y is 1887 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.45 times that of Y, and its 1 radius is 0.799 tines the radius of Y. 12. [ 1 pt] The small spherical planet called Glob has a mass of 7.40 x10^18 kg and a radius of 6.20 x 10^4m, An astronaut on the surface of Glob throws a rock straight up.. The rock reaches a maximum height 2.30 x 10^3m above the surf to of the planet before it falls back down. What was the initial speed of the rock as it left the astronaut's hand? (Glob has no atmosphere, so no energy is lost to air Friction.) 6.67E- 11Nm2/kg2. 13. [ 1 pt] A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is T = 1.66 hours, What is density (mass/volume) of the planet? Assume that the planet has a uniform density.
Explanation / Answer
satellite question
T = 1.66 hrs
we KNOW T2 = 4(3.14)2/GM * R3
Density = M/Volume = 1260kg/m3
