How far is the center of mass of the earth-moon system from thecenter of the earth? (appendix c gives the masses of the earth andthe moon and the distance between the two.)

from the center of the earth.

Explanation:

We have a system of Earth & Moon:

Now we assume the origin of the system to be at the center of the earth.

Now for the center of mass of this system:

here:

are the distance of the centers (center of masses) of the Earth and the Moon from the origin of the system.

∵ since we have taken the point as the origin of the system.

now putting the values in the above equation:

from the center of the earth.

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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d eras and periods