Posted by **Michelle** on Tuesday, December 16, 2008 at 6:54pm.

The moon is receding from the Earth by approximately 3.8 cm per year. Earth's mass is 5.98 x 10^24 kg, and its radius is 6.38 x 10^6 m. The Moon's mass is 7.3 x 10^22 kg, its radius is 1.79 x 10^6 m, and its orbital period around Earth is 27.3 days. The current average distance between the 2 surfaces is 3.85 x 10^8 m. Assume that neither body gains or loses mass and that the recession continues at a rate of 3.8 cm per year.

a.) Approximately how much will the gravitational attraction between the Moon and Earth change between now and 499 million years from now?

b.) Approximately how long, in present Earth-days, will it take the Moon to orbit Earth 499 million years from now?

## Answer This Question

## Related Questions

- physics - can you walk me through this problem At what distance from the Earth ...
- Science..physics - The moon is the Earth's nearest neighbour in space. The ...
- science - The moon is the earth's nearest neighbor in space the radius of the ...
- physics - 'the mass of the Earth is approximately 80 times the mass of the moon ...
- Physics - The radius of the moon is approximately one quarter of the earth's ...
- Physics - The average distance separating Earth and the Moon (center to center) ...
- physics - The Moon's mass is 7.34 x 10^22 kg, and it is 3.8 x 10^8 away from ...
- Physics - The Moon causes tides because the gravitational force it exerts ...
- Physics - A spaceship is on a straight-line path between the Earth and the Moon...
- Physics Classical Mechanics - The mean distance from the center of the earth to ...

More Related Questions