why does water dont spill when earth rotates.4get about gravitation?
486598
You can never forget about gravitation. The water is rotating at the same speed the earth is rotating. You can travel fast in a car without spilling your drink, no?
314905
Imagine a molten ball of liquid rock in space. It will take the shape of a sphere due to the gravitational pull - any other shape would be turned into a sphere by gravity over time. \n\nNow, set this sphere rotating. Due to centrifugal forces, the sphere will bulge slighty round its equator. There you have it, the shape of the Earth.
464601
Earth revolves around the sun because the giant nebula out of which the solar system formed was spinning and the angular momentum is conserved, and earth spins because of the initial config. Why it revolves in an ellipse, see this\nexplanation at http://www.mathsnet.net/cabri/feynman.html
989766
hey this is a very good question. \nthe circumference divided by 24 (i.e. hours) = angular velocity travelled in one hour. \nif the rotation changes suddenly or  it stops rotating suddenly then due to the inertia that every moving object carries will suddenly travel in the direction of rotation at exactly the angular speed of the earth. so ocean water will move all over the earth and the plates beneath the earth will shift causing severe earthquakes and the volcano will erupt from the gaps due the internal pressure. so all the movable objects will shoot. these objects will move in the direction perpendicular to the centre of the globe in the direction of the motion respectively. there after stopping , there would be more gravitational force exerting on the objects cause the earth while in motion , objects have centrifugal force that is why the weight is different at the time when earth stops rotating and due to the absence of the centrifugal force weight would be more. there day will be 6 months and the night would also be 6 months longer like the north/south pole.
841133
'Does gravity work on water vapor's '  -- yes, gravity works on everything...\n\nthen\n\n' why they go upward?'  -- recall Newton's second law of mechanics, F=ma, here F is not just a single force. It is rather a net result of all forces acting upon the body. That's what determine finally how that body with mass m is going to move.\n\nSame with water vapor -- there is another force in addition to gravity acting upon it, called buoyancy (recall Archimedes law of buoyancy) that is opposite and greater than (or equal to) gravity resulting in a motion you mention.
862988
Earth and the other planets were formed from a giant cloud of gas and dust revolving around the primitive sun. As in any other moving fluid, local whirlpools kept appearing and disappearing all the time. \nAs the cloud started to cool, local perturbations caused density variations : some whirlpools got lumpier than others, just as in a bowl of porridge when it cools off. They thus grew more stable and accumulated more matter because of their increasing gravity. On further cooling, these separated out as planets, molten globes of matter still spinning furiously.\nEven when the planets solidified at last, they retained a part of their original spin. That's why the Earth and the other planets are still spinning around their axes. That's what, thankfully for us, creates days and nights.
533474
WEll where will water fall. i mean when ever i saw water its on sealevel then where the hell will water fall. yeah water falls but from clouds. There is a word gravity. which plays important role. else after birth u wud have not fallen down. u wud be somewhere in sky.
240419
It should flow counterclockwise because of the Coriolis effect.\n\nHowever:\n\n>> But, the Coriolis force is very small, indeed. \n \nCompared to the rotations that one usually sees (tires on a travelling automobile, a compact disc playing music, or a draining sink), the rotation of the Earth is very small: only one rotation per day. The water in a sink might make a rotation in a few seconds and so have a rotation rate ten thousand times higher than that of the Earth. It should not be surprising, therefore, to learn that the Coriolis force is orders of magnitude smaller than any of the forces involved in these everyday spinning things. The Coriolis force is so small, that it plays no role in determining the direction of rotation of a draining sink anymore than it does the direction of a spinning CD. \n\nThe direction of rotation of a draining sink is determined by the way it was filled, or by vortices introduced while washing. The magnitude of these rotations may be small, but they are nevertheless gargantuan by comparison to the rotation of the Earth. I decided to include a picture of a draining sink, and the first one I tried in my house was found to drain clockwise (the opposite of what the silly assertions would have it do here in the northern hemisphere). This direction was determined entirely by the way the tap filled the sink. The direction of rotation of a draining toilet is determined by the way the water just under the rim is squirted into the bowl when it is flushed.<<\n\nI guess you'll just have to observe - I have made the water in kitchen sinks swirl the "wrong" way just for the heck of it, and it doesn't begin to immediately go the "right" way unless I act on it.
438984
Minimally, 2.  Depending on how simplisticly we are thinking about the problem.\n\n1) the Earth rotates around it's axis\n2) the Earth revolves (orbits) around the sun\nhttp://www.ucolick.org/~bolte/AY4_00/week1/motionsC.html\n\nMaximally: ???\n3) the Earth and Moon really form a system together which revolves around the sun so there is the wobble attributable to that interaction.\nhttp://search.yahoo.com/search?ei=utf-8&fr=slv1-&p=earth%20moon%20system%20motion\n\n4) the Earth precesses about it's axis changing the tilt relative to the orbital plane\nhttp://csep10.phys.utk.edu/astr161/lect/time/precession.html\n\n5-14) Perturbations in Earth's motion due to gravitational pull from other planets (Mercury, Venus, Mars, Jupiter, Saturn, Neptune, Pluto, UB313).\n\n15) Solar system motion through the Milky Way galaxy which brings the Earth along with it\n\n16) Motion of Galaxy through the universe bringing along the solar system and earth.\n\n17) Changes in motion due to sloshing of the oceans and earthquakes.\n\n...
662166
A longish answer I picked up from the source link in reply to question 26 on the page. I'm quoting it verbatim herebelow\n\nQuote"\nBecause whatever it arose from--probably a cloud of gas and dust--was rotating to begin with.\n\nThe thing to keep in mind that even a very slow rotation of a cloud of objects gets greatly speeded up as it condenses at the center. The reason is a basic law (a consequence of Newton's laws of motion) by which a quantity known as ANGULAR MOMENTUM (or rotational momentum) is conserved. The angular momentum can be defined as the average radial distance, TIMES the average velocity of motion, TIMES the mass.\n\nThe mass does not change when matter collects near the axis of rotation, so we neglect the last part. Then, if the material collectes in the middle, where its average radius of rotation is 10, 100 or 1000 times smaller, the average velocity of its particles increases by the same factor.\n\nYou see this happen every day. When water drains from a filled bathroom sink, even if the water in the sink is rotating so slowly that you do not notice, by the time it reaches the drain it is spinning rapidly enough to form a funnel. (It does not spin in the opposite direction in Australia: the effect on which this claim is based is far too weak to have much effect. See "Stargazers," section 24). You also see this in hurricanes and tornadoes.\n\nAnd you see it happen when a large object in space collapses. In 1054 a star "went supernova" in the constellation of the Crab, a process in which the top layers blow off and the core collapses to a tiny "neutron star," perhaps 15 km across and as massive as the Sun. The collapsed core of the Crab Nebula apparently rotates 30 times a second, because that is the frequency at which it blinks in x-rays and radio (and I believe in its light, too).\n\nIn the solar system all planets orbit in the same direction and nearly in the same plane, and they and the Sun rotate in the same direction too (= counterclockwise, viewed from north). This suggests that they all condensed from the same cloud."   Unquote
945495
The idea that water drains counter clockwise in the northern hemisphere, and clockwise in the southern hemisphere is wrong. It is a popular misconception, and is based on something called the "coriolis force", which is kind of complicated to explain, but has to do with the spinning of the earth. It is true that the coriolis force would influence a liquid in the direction it drains, but the force is TINY compared to the other forces present in the liquid. The way water drains - whether clockwise or counter clockwise - is based mainly on the intial direction of the water in the container, not whether it is in the northern or southern hemisphere. So in short, at the equator, it will drain in either direction, depending on the initial direction! Hope this helps!
46530
it's the same reason that if you mix oil and water in a glass, the oil will float to the top and the water will sink to the bottom.  oil has a lower density, which makes it lighter.  the heavier water gets pulled down by gravity and it displaces the oil.  since it is a liquid, the molecules of oil and water can move relative to each other.\n\nthe inside of the earth is a liquid, too - it is very hot and all but the outer surface of the earth is molten rock.  this has over time allowed the lighter minerals like quartz and feldspar to rise to the surface, while the heavier minerals like nickel and iron make up the earth's core.
465766
TIDES 101:\n\nThe earth's water is fluid. It moves easily.\n\nThe earth spins once on it's axis in ~24hr period.\n\nAs the earth turns, it literally spins through the water. This causes it to bulge up along the coastlines. This is called the tidal bulge.\n\nDepending on earth's proximity to the moon & to some degree, the sun, we will either be in or out of the bulge.\n\nIf the the moon & the sun are lined up on the same side the tidal bulge will be greater than normal.\n\nIf the moon is at a right angle in relation to the sun & earth, then the physical forces cancel each other out & the tidal bulge isn't as great.\n\nBelow is a diagram to go along w/ the info above.\n\n:)
1010692
ok first of all just because one thing the bible says is true,that wouldnt make the entire thing true and second of all,originally the Earth was a ball of molten rock that cooled down.water didnt come around till later(im not sure how though)
433088
The coriolis effect is the effect on the flow of fluids due to the earth's rotation. Because fluids (liquids and gasses) experience very little frictional force with any surface that it is in contact with, as the earths spins, the fluids tend to lag behind and appear to spin.\n\nThis is mosy noticable in Hurricanes. Note that all the hurricanes abov the equator spin in the same direction.
199557
water is always flowing. there are currents within a stand-alone puddle. waves constantly crash onto a beach, proving there is no specific point in which they stop. They can go further under the right circumstances. The only reason they don't is due to angular force of gravity. gravity pulls all matter toward the core, including water. should land reach higher above the water's level, the water shall not overtake the land, unless as specified above. since land is solid, or several solid objects, and water is a fluid, land shall not dissolve quickly to a flat line as water does.
157120
This goes along with the question of why don't we fall off the earth if it is round. The answer is because gravity is holding us (and the water) down.