why does wind resistance make a leaf fall slower?
448071
Because of it's position. If it's vertical. it would fall faster. If it's horizontal, there is more space for the air to push it up. It would fall slower because air molecules pushes it up as the leaf pushes air down. Have you heard of "Action-Reaction". All objects exert force to one another. Hope that helps.
453275
Most of the atmosphere rotates with the earth, but yes, I'm sure inertial effects produce a tiny, tiny amount of friction.  More important are tidal effects of the moon's gravity, which are gradually slowing down the earth's rotation.  In a few billion years the difference in the length of the day will be noticeable.  And there's another kind of "air" resistance -- the solar wind, a continuous (but varying) stream of particles ejected by the sun.  These are mostly charged particles and are deflected by the earth's magnetic field toward the poles, where they produce the auroras (borealis and australis?), the northern and southern lights.
597267
Lower pressure will result in more "convection," or vertical movement of moisture.  So in general, the lower the pressure the better chance of precipitation.
1153834
since submerged give you more resistance, the turbine run slower at the same power compare to one that's not.
214499
It all has to do with altitude. The higher you are from the earth, the colder it gets. Air is also thinner.
1023655
well, it is a little slower in air, but not enought to effect any calculations, but it behaves this way because lightbehaves as both a wave and a particle.  The particle characteristic gets slowed down slightly by the air molecules, but the wave portion keeps chugging through the molecules, because waves need something to travel through.  Check out http://en.wikipedia.org/wiki/Speed_of_light
1152801
Leaves sense the change in moisture in the environment with the coming storm. The stomata (openings in the bottom of the leaves only to exchange carbon dioxide and oxygen, with some water vapor needed for photosynthesis within the leave) take advantage of the added water source available from the air by rolling over temporarily to take on some water. They go back to normal when the rain starts so that the openings are not exposed to the rain and drown the openings.... Also, some leaves have flat petioles, (leaf stems) that make them roll over in the wind. Have you ever seen a quaking ASPEN tree?  It shakes in the wind due to its flat stem structure of it's leaves....I can go on and on......hope this helps.....   :-)
699006
Because there is no atmosphere on the Moon, so no air resistance.  In the absence of air resistance, all objects fall down at the same rate.  Galileo is said to have shown that by dropping two weights from the top of the Tower of Pisa - they had different weights, but they landed at exactly the same time (so the story goes).  The only reason feathers usually take longer to fall is because of air resistance.
781134
since water likes to travel from an area of higher concentration to lower concentration, the cells of a plant living in mostly salt will have very little water.  the cell of this plant will appear more thin and streamlined as they are not puffed up by the additional water.
337412
The answer you are looking for is in the soil-plant-atmosphere continuum.  I'm too tired to give a full answer now so I will come back to this.\n\nIt basically works on negative pressure.  Air is the driest in the continuum and pulls water through the stomates from the xylem (not the phloem) up the stem from the roots, from the soil.\n\nI'll come back later.
543373
We have air around us. The atmosphere has high preasure and low preasure. When the high preasure area turns into low preasure, the air moves from high preasure area towards the low preasure. This movement of air from one area to another causes the wind. \n\nIt has nothing to do with clouds. The faster the low preasure area is formed, depends on whether you have clouds, or thunderstorms. Low preasure areas causes rain. This is why normally you have winds before the rain.
221734
Just a SHADE slower than light.
417291
Once the rising air depletes whatever inertia it had from rising through air resistance, it basically stops rising.\n\nNote that if it was rising, it was likely because it was less dense than the surrounding atmosphere in the first place.  This is likely because it was warmer than the surrounding atmosphere (warmer air is less dense than cooler air).  \n\nSo what densifies this warmer, less dense air?  Well, it eventually loses its heat energy to the surrounding air, making it roughly the same temperature, which also makes it roughly the same density.
1151411
Objects of different mass do fall at the same speed, but air resistance hinders this fact.  For example, if you drop a bowling ball and a feather at the same time on the Earth, obviously the bowling ball falls faster. \n\nHowever, on the moon, when the astronauts dropped a feather and a bowling ball, they hit the ground at the same time. \n\nIt would seem that the bowling ball should fall faster since gravity is pulling on it with more force. But, with the more mass, comes more inertia, which meas it resists being pulled more than the feather. So, the feather is pulled less, but it resists less as well, so because of that, they will fall at the same time. The relationship between the force of pull and the object's inertial compensates exactly so that all objects fall at the same rate.
654890
The greater the pressure difference, the stronger the pressure gradient, hence the stronger the pressure gradient force.\n\nPressure gradient force is responsible for triggering the initial movement of air, which in turn leads to the development of wind. It is directed from higher to lower pressure at right angles to the equal pressure surfaces, isobars. The closely spaced isobars in a weather chart indicate steep pressure gradients, strong forces, and high winds, while widely spaced isobars indicate gentle pressure gradients, weak forces, and light winds.\n\nBernoulli's Principle............
973867
There are a number of reasons why trees fall in autumn. however, the plainest explanation is that they are preparing for the coming winter. So what is it with winter that trees need to prepare for? During the season, the air is cold, and what comes along it is dry air. Cold air usually doesn't carry much water moisture but the dry air does. this is what the trees are afraid of - to have much of their water absorbed by the dry breeze. As a defense mechanism, all water from a tree is transferred and brought to a place where the dry breeze coudn't reach and affect greatly. The leaves, which are thin and flat, are poor against preserving water and so during the fall, the trees take out the water from the leaves that eventually makes the leaves dry and dead. These dry leaves fall down. and the place where they are formerly attached to is specially waxed with a substance that will prevent the water from drying up or being absorbed.
742485
wind is the result of air pressure, air molecules travel from low to high pressure zones, resulting from air warmed by the sun. The strength of the wind i guess would be dictated by the difference in pressure between two zones, and any obstacles it may have to pass over/through in between...