2006-07-01 11:40:37 · 16 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Because the oceans are pulled in by Earth's gravity. Pick up a book just once okay?
2006-07-01 11:43:03 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Gravity exists in the presence of matter. The more matter or the more dense the matter, the greater the pressure of gravity on nearby objects. There is a formula based on Einstein's e = mc^2 here: p(G) = p + p(1) + p(2)+ p(3) - A/(4*pi*G). p(G) represents the total gravitaitonal pressure on a system. p represents e = mc^2 while p(1), p(2), and p(3) represent the gravitational pressure along the three orthogonal axes. A could be replaced by "1" for ordinary use not requiring scientific accuracy, and G is the gravitational constant, Einstein's, not Newton's. And there IS gravity in outer space, it's just a very weak force unless you are very close to the source. Remember, gravity not only "holds" people onto the surface of the earth, it also "holds" the earth around the sun.
2006-07-01 14:27:54 · answer #2 · answered by flyfisher_20750 3 · 0⤊ 0⤋
Gravity is everywhere, first off. Second, the oceans are on the earth and are not only held on the earth by gravity, but contribute their mass to the total gravity that the earth exerts on other bodies in space, e.g., the moon. Atmospheric pressure has nothing to do with either the oceans staying on the earth, nor with people and their stuff staying on it, nor does any centrifugal force resulting from the earth's spin cause anything to stay put on the earth. It is all gravity.
2006-07-01 11:46:18 · answer #3 · answered by sonyack 6 · 0⤊ 0⤋
What? the Earth's gravit hold the oceans and your silly butt here. Space can't doesn't have gravity becaues space is with out mass
the things in space have mass the bigger the objects ie. planets large meteors, comets? etc the more massive the more gravity. If a large enough object passed close enough to us it could suck our atmosphere, oceans and even your pet guinea pig off the planet.
2006-07-01 11:48:14 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The earth has its own gravity field. It pulls not only the oceans, but everything on the planet towards the CENTER of the Earth. This is also why people in China aren't standing on their heads ;)
2006-07-01 13:18:27 · answer #5 · answered by kel m 1 · 0⤊ 0⤋
There is plenty of gravity acting in space. When we see "weightless" astronauts, they are actually falling in toward the earth constantly, and appear weightless compared to their spacecraft. The craft, ideally, is also moving horizontally to the earth fast enough that it just revolves in a circle around the planet, rather than crashing into it.
If the space shuttle stopped moving forward and just tried to "hover" over a point on the earth at the altitude it normally operates at, it would crash because of earth's gravity pulling it.
2006-07-01 11:46:31 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Because the oceans are here on earth, not in outer space.
2006-07-01 11:43:18 · answer #7 · answered by Josie 5 · 0⤊ 0⤋
Earth's gravity... and really, can you even imagine a world where you see water from the oceans just above your head?!?! Jeez...
2006-07-01 11:46:53 · answer #8 · answered by kramellou 2 · 0⤊ 0⤋
hmmm. I think it is because that the earths mass is greater than that of the oceonse so it can use its gravity to hold them in place.
2006-07-01 11:44:07 · answer #9 · answered by Alexander K 1 · 0⤊ 0⤋
because earth has gravity. the oceans are on earth they arent thier own planet although it may seem so
2006-07-01 11:46:57 · answer #10 · answered by rose_red_91 2 · 0⤊ 0⤋