Take a garden sprinkler, one which forces water through a tube bent into an "S" shape, so that the water is sprayed out in opposite directions at the ends of the "S", causing the sprinkler to rotate.\n\nThen, imagine submerging it in water and running the hose the other way, so that water is sucked in; which way would the sprinkler rotate? The same direction, or the opposite?
210893
Actually, the sprinkler rotates in the same direction as before.\n\nThe motion of the water as it gets into the sprinkler exerts a force on the inner walls of the tubing that has a similar direction as in the first case. Considering the previous posted answer, the thing to consider here is the friction. In a frictionless system, it may not move at all, but since our world is not frictionless, the contact of water with the walls implies some momentum exchange.\n\nIt's hard to explain without images, but try the following. Having the sprinkler out of the water, try blowing some air inside one of the openings with your mouth or a syringe. Obviously the whole tubing will start spinning away from the direction of the blowing air. Well, the same happens with the sucked water, but instead of it being "pushed" inside, it's "pulled" inside. The process may be different in cause, but the effect is the same.
20462
Liquid would hit the ground first due to the movement of the liquid inside the can. It produces more speed because the shift of gravity and would "beat" the other can to the base of the incline.\n\n---------------------------------------------\n\nIf anyone has other questions that they want sent specifically to me, please send them to yourqandaperson@yahoo.com -- Please keep them appropriate and ask only realistic questions or your question will be deleted and reported! Thank you for using this service!
262911
Trees do NOT get water to their leaves using cappilary action alone. Cappilary action could lift water to maybe 10 metres maximum. The tallest trees are over 8 times that height. Cappilary action plays only a small, albeit vital, role in lifting water in trees.\n\nThe simple answer is that the tree uses the equivalent of a siphon effect to lift the water. A siphon works because water is cohesive, IOW water sticks to water. That cohesiveness of water in a siphon tube means that as water at one end falls it is able to suck more water up from the other end. Provided that the fall is greater than the rise you are trying to overcome you can use a siphon to lift water to significant heights.\n\nA tree trunk is basically composed of masses of siphon tubes filled with water, but it doesn't have any physical 'fall' component. Instead what the tree uses is the force generated by evaporation. As water enters a leaf it is exposed to the air and allowed to evaporate. Because water is cohesive that loss of water creates a negative pressure that pulls more water into the leaf within the leaf, and that in turn creates a negative pressure that pulls water into the vessel elements of the branch and the trunk. That pressure is sufficiently high to lift water to the tops of the tallest trees.\n\nWhich is why trees use such massive quantities of water. Even a small tree will use over 100 litres of water a day and less than 1% of that will be used physiologically. The rest is simply evaporated off to draw more water up the stem. It's an incredibly wasteful process.\n\nThis is also the reason why trees in dry environments are invariably shorter than plants in wetter environments. Because the system functions like a siphon the water column in the trunk can never be allowed to break or the pressure inside will immediately drop to zero. It's like getting vapour lock in a fuel line and plants can't re-prime the line. There has to always be sufficient water in the ground to feed the negative pressure required in the column. The taller the tree the greater pressure required and hence the more water required. As a result the maximum height of tree is determined in large part by the amount of water available.
306669
It looked like the hover boards worked with some sort of magnet on the bottom that probably conteracted with the earth's magnetic force. Since, water isn't magnetic, the hoverboard wouldn't work on water. Thats what I thought at least.
128068
Get an empty 2 liter soda bottle and fill it half-way with water. Hold the top and spin it in a circular motion. This will cause the water to look like a tornado.  Technicaly, a tornado is caused by a cold air mass "wedging" a warm air mass up. Another mass of air then clashes into them and causes the air to spin.
607853
No, you've got it backwards, it flushes counter-clockwiswe above the equator, and clockwise below. Right on the equator should flush counter-clockwise as well.
559330
This is a very common myth.\n\nWater spinning clockwise & counterclockwise has to do more w/ types of plumbing fixtures than it does the Coriolis Force. You can actually find instances in both hemispheres where it does not follow this mythical rule.\n\nThe Coriolis Force, quite simply put, is the deflection of moving objects to the right or left due to the rotation of the earth. Right in the N. Hemisphere & left in the Southern.\n\nLarge objects, such as missiles, are affected by the Coriolis Force so much so that the military must make adjustments when launching them at a target.\n\nSmaller objects, such as a baseball being thrown, is only slightly affected. The effects are so small that we do not notice them at all.\n\nSo to answer your question. No it is not affected at the equator. Not anymore so than it is affected in either of the hemispheres.
26736
It's due to the rotation of the Earth - specifically the Coriolis Effect. See http://answers.yahoo.com/search/search_result?p=Coriolis+Effect\n\nMy answer assumes you have a circular toilet which drains right down the middle and recieves no directional impulse from the water flowing in ;-). ie. Under strict controlled conditions, you can make water spin in opposite directions as it drains through a hole.
545615
That's an urban legend.  Windmills are generally set up to rotate in a way that makes the most out of the prevailing local wind.  If you look at windmills you will find that they do not all rotate the same way.
86038
Finally a way for me to pick up that 7-10 split!  :)\n\nI agree with the basic premise of oscillating assuming a vacuum (since we are assuming no molten core, why not a vacuum as well?).\n\nBut, depending on the direction of the hole in relationship to the rotational axis of the earth, wouldn't the ball start bouncing against the sides of the hole due to the mechanics similar to that of a Foucault Pendulum?
448831
Answer d is true.\n\nCheck out the website below for information on circular motion.
372775
Episodes of the Simpsons and urban legend have it that the spin of flushed water is determined by the hemisphere one is in, presumably because cyclones, hurriances, and other large-scale forces of nature spin in opposite directions in opposite hemispheres.\n\nUnfortunately the force that makes hurricanes and cyclones spin in opposite directions (the Coriolis force) operates on a very large scale, over thousands of miles in fact. The forces that determine whether the toilet flushes clockwise or counter-clockwise are a function of the toilet, no more, no less. The Coriolis force does not operate on such small scales as the whole manifestation of its effect is seen due to the difference in rotation between two points on Earth that are far apart.\n\nSo the answer to your question is "Depends on the toilet", nothing else.
242450
Why do you think rotation isn't a natural motion? Angular momentum is conserved, so when a gravitational collapse happens, the natural tendency *is* to rotate. The only exception would be a situation when everything was initially at rest (which wasn't the case). Also, why do you think all the stars rotate *in sync*? Each one is going in its own orbit with its own velocity. These velocities are not all the same by any means.
652645
It's just patterns created by the irrigation equipment.\n\nCrop circles, people? Sure hope yer kidding...
96013
Short answer, they are called "tornado;" as you will see below, tornadoes usually rotate in a counter-clockwise direction in the northern hemisphere, clockwise in the southern.  In the rare event of it spinning in the opposite direction, which I believe was the nature of your question, it is called an "anticyclonic tornado."\n\nTornadoes normally rotate in a cyclonic (counterclockwise) direction in the northern hemisphere, as the warm air in which thunderstorms usually form sweeps north and jet streams come from the west, creating a situation in which the storms rotate. In the northern hemisphere, this rotation is counterclockwise, and in the southern hemisphere, clockwise. The tornadoes usually rotate the same way. Sometimes opposite direction swirls develop under a thunderstorm. About 1 in 100 tornadoes in the northern hemisphere rotate in an anticyclonic direction.\n\nI hope this helps.
270509
Isnt it the other way round??
405175
Suppose there is load and two men are pulling it in one direction each one giving a force of 5N.\n\nIn the language of vector, two vectors of magnitude 5 are acting in the same direction,\n\nThe resultant is a vector of magnitude 10N in the same direction. \n\nIf they are pulling it in opposite direction the load will not move.\n\nIn this case the two vectors of equal magnitude are acting in opposite direction.\n\nThe resultant of these two vectors is zero.