2006-10-31 16:11:16 · 11 answers · asked by Gayatri 2 in Science & Mathematics ➔ Physics
The gas molecules are in random motion, thus move in all direction. Therefore, the molecules will bombard into the walls in all direction. They will exert forces in random direction. Therefore, gases exert pressure in all direction.
2006-10-31 16:22:00 · answer #1 · answered by Anonymous · 0⤊ 0⤋
All substances are either solid, liquid or gas (also known as vapor) Due to the force of gravity a solid will exert pressure downward. A liquid is the same in that gravity causes the pressure to be exerted downward, if it is in a container it will also exert forces on the sides. Imagine if the container were not there, the pressure would cause it to spread out.
A gas is a little different. If a gas is in a container and is at the same pressure as the surrounding air it will exert little or no force. If the container is pressurized for example a propane gas tank or a balloon that has been blown up, it will exert forces evenly against all surfaces inside the container. If you understand the concept that all actions cause an equal opposite reaction, it makes sense that the pressure would be distributed equally. If you could somehow create an area inside the tank or balloon with a higher pressure, the equal and opposite reactions would cause a chain reaction that would equalized the pressure almost immediately
2006-10-31 16:32:46 · answer #2 · answered by b0jangle 2 · 0⤊ 0⤋
The particles of a gas have what is known as random motion imparted to them by heat energy. Consider just a single particle (atom, molecule or mixture of molecules). It's motion is sometimes compared to a drunk staggering around a lamp post. He moves in all directions randomly - sometimes toward the post sometimes away from it. It can be proved mathematically though that with time he will end up further from the lamp post. Back to the gas particle. With time we can predict that it will be a distance from where it started but we can't predict in what direction. A single gas particle then exerts force in only one direction. Now consider a large number of particles (drunks if you wish) all moving about randomly. Here is an important point. They have an equal probability of moving in any direction. If you have a large number of particles there will by laws of chance be as many moving east as west as north or south. Equally in all directions in other words. In summary, a single particle of a gas exerts force in only one direction at any given time As we increase the number of particles the chances become virtually 100% that force will be exerted equally in all directions. That's why a balloon filled with billions of air particles is spherical. To any extent that it is not - think of the balloon animals carnival artists make - the lack of spherical shape is due to uneven composition of the balloon material acting as a counter force on the air particles.
2006-10-31 18:22:00 · answer #3 · answered by JimWV 3 · 0⤊ 0⤋
A gas is simply a collection of particles (atoms, molecules) all of which are in constant motion. When you blow up a balloon, you've filled it with gas. The molecules that make up the gas in the balloon are all travelling in various directions and colliding with each other as well as the inner surface of the balloon. Those collisions with the balloon exert force on it or pressure.
2006-10-31 16:19:47 · answer #4 · answered by Rob VH 3 · 0⤊ 0⤋
The nature of gas is that it's molecules are free ranging and as a result of bouncing off of each other and every other molecule, seek to expand to the greatest volume they can.
This is opposed to liquid which has surface tension and only exerts pressure within it's set volume, even though it's molecules are free ranging as well.
2006-10-31 16:14:56 · answer #5 · answered by roamin70 4 · 0⤊ 0⤋
You can think of the pressure of the gas as coming from the force of its molecules banging against the walls of the container. If you increase the gas temperature, that increases the speed at which the molecules bang around, and the pressure goes up. Increase the density, and there are more molecules hitting the walls, and again, the pressure goes up.
2006-10-31 16:19:51 · answer #6 · answered by injanier 7 · 0⤊ 0⤋
mamu wo aisa hai ke gas is made up of molecules which are away from each other this cause the air to move in all direction and bcoz of the density it exertrs pressure in all direction samjha kya bap. :-)
2006-10-31 16:35:07 · answer #7 · answered by anand dhavle 2 · 0⤊ 0⤋
All gas molecules repel eachother in all directions.
2006-10-31 16:15:33 · answer #8 · answered by Sunny D 1 · 0⤊ 0⤋
With a man on second and no outs?
2006-10-31 17:08:23 · answer #9 · answered by Strix 5 · 0⤊ 0⤋
Hi. All of them.
2006-10-31 16:13:00 · answer #10 · answered by Cirric 7 · 0⤊ 0⤋