It is because of the continuous bombardment of liquid molecules on the wall.
To expand
'This is because the air particles are bumpinginto each other and the walls. When this happens it causes pressure on the walls because of the speed the air particles are moving
A gas exerts pressure on the container because it is bouncing off the walls of the container at a certain force. The greater the force is the greater the pressure.
The gaseous molecules are in continuous random motion and during their motion continuously strike the walls of container and exert the force on walls,the force per unit area is the pressure of the gas.
The gas molecules are moving at speeds of hundreds of metres per second. When they strike the vessel, they are accelerated in the opposite direction. The pressure on the vessel is the force exerted to cause that acceleration.
As the volume is decreased, the same number of molecules of air have a smaller space to move freely in. The number of collisions of molecules of air with the walls of the container per unit time increases. Since pressure is the force exerted over an area, the pressure increases.
Yes
Kinetic theory explains the pressure that a gas exerts on the walls of its container. This describes elastic collisions between the atoms or molecules in the gas with the container's walls, which collectively exert a measureable pressure.
Contact between the particles of a gas and walls of the container cause pressure in a closed container of gas.
Contact between the particles of a gas and walls of the container cause pressure in a closed container of gas.
gas pressure
A gas consists of particles, which are either atoms or molecules, which all move randomly, and independently of each other. Every time a particle bounces off the wall of a container, it exerts some degree of pressure. The total of all the particles bouncing off the walls creates the pressure that we observe.