what is the air pressure pushing it?
209316
Here's how it works:\n\nThe air and water serve two different functions - the air is what is compressed, and pushes the water out of the back end of the rocket.  The water, although basically incompressible, is what makes the rocket go.  Momentum is always conserved, so whatever momentum (mass times speed) the water gets going out the back is also imparted to the rocket in the opposite direction.  You can think of it as positive and negative added momentum, creating a net change of zero.  The rocket is usually a much lower mass than the water, so the speed it achieves in order to match the momentum is higher than that of the water.\n\nAfter the water and air are expelled from the rocket, gravity is the only remaining force; the rocket slows, reverses direction, and lands on the ground.
329380
It's the change in air pressure which causes it.
470331
If nitrogen makes up 78% of the air, it will be responsible for 78% of the pressure, namely 760(0.78) = 592.8 mm Hg.
333990
Hi: Something less than 95 mph as force has been \n exerted in a direction somewhat against the direction of the pitch.  Ken
189309
The answer is "no"\n\n"Can you guess the riddle?"\n\nNo i cannot. Kinder gardeners do not know what pressure is.
501319
force of air is less than it's weight therefore it rises and it drops.\n\na=b
149842
as someone pointed out. it could be because of a very large angular rotation decreasing the air resistance.
227592
DUE TO SURFACE TENSION POSITIVE ANGLE OF CONTACT AND INTERNAL PRESSURE.
553479
http://en.wikipedia.org/wiki/Pressure_gradient_force\nhttp://en.wikipedia.org/wiki/Temperature_gradient\nHope this helps, good luck!
400563
Constant speed means zero net force.  So what's balancing the air friction?
409668
because its turning with a lot of force
483197
The pressure in an aircraft tire is typically in the range of 180 to 250 psi depending on model and the CBR (California Bearing Ratio) of the intended runway.  The atmospheric pressure at sea level is 14.7 psi.\nSo, if those tires were put in space, they would feel pressure of 195 to 265 psi, about 6 to 8% change.  Nothing to worry about, the pressure gets much higher only from the heat of the braking when back on the ground.  And it is cold in space with the wheels inside in the shadow of the landing gear bay, so the pressure gets actually lower in space.
98173
According to your question statement, the pressure inside the soccer ball is less than that of the surrounding atmosphere. This seems suspect...
91977
the speed of the wind that pushes it along...
269939
Distribution of force over area.
478642
the pressure will be higher but the density won't change, it can't possibly change if it's a sealed, rigid container, density is mass/volume and you aren't changing the mass or the volume, therefore the density will be unchanged
421260
For the same reason that water goes down the plug hole in a vortex.  Air goes from high pressure to low pressure, but it goes round areas of low pressure in ever decreasing circles.