2020年9月29日 · Earth’s Moon has a diameter of around 3.474 km / 2.158 mi and a radius of 1.737 km / 1.079 mi. In comparison to Earth, the Moon has only 1.2% of Earth’s mass, or in another way of looking at it, the Earth is 81 times heavier than the Moon. The Moon is about one quarter the size of Earth, and it would take around 50 moons to fill the Earth.

How to Find the Radius of the Earth? During the 3 century, B.C. Eratosthenes was able to mathematically calculate the diameter of the earth by comparing the difference in the angle of the sun’s rays at different geographic points. He was the first person that was able to calculate the radius of the earth.

If the radius of the earth decreases by 1% without changing its mass, will the acceleration due to gravity at the surface of the earth increase or decrease? If so, by what per cent?

2020年3月17日 · If you measured the radius from Earth’s center to the equator, you would obtain a radius of 3.963.2 mi / 6.378.1 km. However, if you would measure it from the center to one of Earth’s polar regions, you would obtain a radius of 3.949.9 mi / 6.356.8 km. It isn’t such a big difference, but it is present.

2020年9月29日 · Moons vary in size, shape, and composition, and our Moon is in the top 10 list of the biggest satellites in our Solar System. How big is the Moon? Our Moon has a mean radius of 1,737 kilometers / 1,079 miles, while its polar radius is 1,736 km / 1,078 mi, and its equatorial radius is 1,738 km / 1,079 mi.

If the earth were to suddenly contract to 1 n th of its present radius without any change in its mass, the duration of the new day will be nearly:

If the radius of earth is 6000km, what will be the weight of 120kg body if taken to a height of 2000km above sea level (i.e surface of the earth).

If the radius of the earth shrinks by 2.0%, mass remaining constant, then how would the value of acceleration due to gravity change. ?

A body weighs 63 N on the surface of the earth. What is the gravitational force (in N) on it due to the earth at a height equal to half the radius of the earth ?

The radius of the earth is 6370 km and of mars is 3400 km. If an object of 200 N weighs on earth what will be the weight on mars? The mass of mars is 0.11 that of earth.