What is the theory behind such phenomenon? I was just wondering...
2007-01-28 23:56:59 · 9 answers · asked by oltroe 1 in Science & Mathematics ➔ Physics
its the perfection of the god's creation .. try to imagine it something else ,,, it wont work dude .. no way ...
2007-01-29 00:04:05 · answer #1 · answered by salamanda 1 · 0⤊ 3⤋
Well the earth isn't perfectly round but it's tenancy towards being round is derived from universal gravitation. The earth has a noticeable bulge in the middle which is actually related to the Earth's rotation and centripetal force.
As for the Earth's rotation there are a lot of theories, but since nobody was alive when the earth started spinning no one can say for certain which is correct. One leading scientific theory about the Earth's rotation involves the formation of the moon. In this theory a large piece of debris, about the size of mars, slammed into the Earth in a offset collision and imparted a large amount of rotational velocity to the Earth and ejected large amounts of debris into Earth orbit which over time merged and formed the moon. In this theory scientists don't know if the Earth was already spinning at a slower rate when the collision happened, but computer simulations have supported this theory either way.
The Earth's rotation is not constant, due to an imbalance in forces caused by the moon and tides, the moons rotation has slowed over millions of years and now exactly matches the time it takes to orbit the earth which is why we only ever see one side of the moon. This same rotational degradation is happening to the earth at a almost undetectable rate.
2007-01-29 08:24:35 · answer #2 · answered by Brian K² 6 · 0⤊ 0⤋
The answers is the rotation of earth about its own axis and also the statement follows:
Which shape has more volume when it compare with the area of that shape? The answer is sphere. Sphere shape will have more volume for a particular area and therefore most of the bodies in the universe has the spherical shape.
2007-01-29 08:24:17 · answer #3 · answered by thiru 1 · 1⤊ 0⤋
Earth's momentum is trying to sling it out into space. The Sun's gravity pulls it back, resulting in an orbit.
Conservation of momentum keeps it spinning.
It is spherical because gravitational forces cause coalescing objects to be that way. Spin a bowl with water in it. It doesn't lump to one side- it evenly distributes. Gravity does the same thing, causing "lumps" to smooth back out again.
2007-01-29 08:19:04 · answer #4 · answered by rich h 3 · 1⤊ 1⤋
The Earth coalesced from a spinning cloud of dust in the primordial solar system. It remains spinning due to conservation of momentum.
It is round due to the gravitational pull of its mass.
2007-01-29 08:04:59 · answer #5 · answered by gebobs 6 · 1⤊ 0⤋
Gravity
2007-01-29 08:04:43 · answer #6 · answered by Anonymous · 0⤊ 1⤋
The gravitational pull of the Sun.
2007-01-29 08:13:05 · answer #7 · answered by Qyn 5 · 0⤊ 1⤋
Due to universal gravitational force of attraction
2007-01-29 08:00:48 · answer #8 · answered by Avatar 2 · 0⤊ 1⤋
gravity playa
2007-01-29 08:13:43 · answer #9 · answered by mcsestud 2 · 0⤊ 1⤋