and the radius of earth too. in kilometer
2007-04-20 03:30:07 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Actually, there is no single radius for the Earth because it is not perfectly spherical. Because the Earth spins about an axis, it is slightly fatter around the equator than any other circumferential measurement. However, if you measure it around the equator, the radius is 6378 km. The circumference (for the record, in the case of Earth, people usually call it circumference and not perimeter) is 40075 km.
As an interesting aside, this value is so close to 40,000 km for a very good reason. The meter used to be defined as 1/10,000,000th of the distance from the North Pole to the Equator. Nowadays, the meter is defined by the distance light travels in a vacuum in a very (very!) short period of time.
2007-04-20 03:41:37 · answer #1 · answered by listrophy 2 · 0⤊ 0⤋
40,000 kilometers.... Did you know that you could find this by searching the Internet for "Earth's perimeter" or "Earth's circumference". You get better answers and you don't waste thousands of people's time.
2007-04-20 03:46:04 · answer #2 · answered by Surveyor 5 · 0⤊ 0⤋
The radius is 3963 miles. The earth has no perimeter; it has no edges.
2007-04-20 03:34:30 · answer #3 · answered by Gene 7 · 0⤊ 0⤋
see here:http://en.wikipedia.org/wiki/Earth
2007-04-20 03:33:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋
i think 60% less than that of jupiter
opse how would i know?
2007-04-20 03:33:49 · answer #5 · answered by Spicy Ketchup 4 · 0⤊ 2⤋