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| Calculate the acceleration due to gravity on the Moon. The Moon's radius is about 1.74 x 10^6 m and its mass is 7.35 x 10^22 kg. | ??? |
| A hypothetical planet has a radius 2.5 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? | ??? |
| A hypothetical planet has a mass 2.5 times that of Earth, but has the same radius. What is g near its surface? | ??? |
| Calculate the effective value of g at 3200 m and 3200 km above Earth's surface. | ??? |
| Calculate the velocity and period of a satellite moving in a stable circular orbit about the Earth at a height of 3600 km. | ??? |
| How far above the Earth's surface will the acceleration of gravity be half what it is on the surface? | ??? |
| An exotic finish to massive stars is that of a neutron star, which might have as much as five times the mass of our Sun (1.99 x 10^30 kg) packed into a sphere about 10 km in radius! Estimate the surface gravity on this monster. | ??? |
| A typical white dwarf star, which once was an average star like our Sun but is now in the last stage of its evolution, is the size of the Moon but has the mass of our Sun. What is the surface gravity on this star? | ??? |
| During an "Apollo" lunar landing mission, the command module continued to orbit the Moon at an altitude of about 100 km. How long did it take to go around the Moon once? | ??? |
