The earth- moon distance is about 60 earth radius. Moon is seen to be of `(1//2)^@` diameter from the earth. What must be the relative size compared to the earth?

The earth- moon distance is about 60 earth radius. Moon is seen to be of (1//2)^@ diameter from the earth. From parallax measurement, the sun is found to be at a distance of about 400 times the earth-moon distance. Estimate the ratio of sun earth diameters.

What is g on the moon as compared to that on earth?

The earth-moon distance is about 60 earth radius. What will be the diameter of the earth (approximately in degrees) as seen from the moon?

A person goes up in space to a height equal to 1/4 times the radius of earth . What will be his weight there as compared to that on the earth?

The diameter of moon is approx, one fourth of the diameter of the earth. What fraction of volume of the earth is the volume of the moon ?

The diameter of the moon is approximately one-fourth the diameter of the earth. What fraction is the volume of the moon of the volume of the earth ?

Suppose there existed a planet that went around the sun twice as fast as the earth. What would be its orbital size as compared to that of the earth ?

Mars has approximately half of the earth's diameter. When it is closest to the earth it is at abot 1/2 A.U. from the earth. Calculate what size it will appear when seen through the same telescope.