You can calculate the pressure of any gas in an enclosed space provided you know the number of moles of gas (or can calculate the number of moles), the volume of the space and the temperature of the gas. The equation is:
PV=nRT
P is the pressure, which is what you are calculating.
V is the volume, which you need to know or to calculate from the dimensions of the piston.
n is the number of moles of the gas, which you need to know
R is the gas law constant; depending upon the units for the other four numbers, you can look this number up on the internet
T is the temperature of the gas, which needs to be in Kelvin for the equation to work
The mass of compressed natural gas is not related to pressure. If you learn about the ideal gas laws you will see that pressure is related to two other variables, which are temperature and volume. The higher the temperature, the greater the pressure, and the smaller the volume into which a given quantity of gas is contained, the greater the pressure. Mass is not relevant, because any mass of a gas, whether from one microgram to a billion tons, can exist at any pressure, depending upon the variables of temperature and volume.
Use the formula: Pressure = Force / Area
You get the force exerted by a hydraulic piston by taking the pressure times the surface area of the piston.
First you need to know what force is required. The pressure the cylinder is going to work at. From this you can wok out the area of the piston and then the diameter of the piston. Force = Pressure x Area
Gas pressure is caused by the gas molecules moving back and forth.You can increase the gas pressure by putting gas into a container with hard walls, i.e. not flexible as in a balloon, and doing one or more of the following:Increasing the amount of gas (pumping gas in)Increasing the temperatureReducing the volume (as in a piston)For more details, read about the "ideal gas law".
To measure a force, depends on how the force is applied. For example if it is a piston rod actuated by a piston, you can measure the pressure inside the cylinder containing the piston, this may be filled with gas or liquid, and calculate the force from the area of the piston/cylinder. If it is a lever system, work out the mechanical advantage of the levers and multiply by the actuating force, probably obtained as above. You can also measure force directly using a strain gauge between the applying force and the object.
Mechanical pressure from the primary piston
see this link for your answer: http://www.springerlink.com/content/w28682230813211l/
Take a tube, put a piston in it, seal off both ends of the tube, and use a liquid, or gas to put pressure in and remove pressure from the tube. As the fluid or gas goes in the tube, the pressure pushes the piston out. As the pressure is released, the piston can recede.
You get the force exerted by a hydraulic piston by taking the pressure times the surface area of the piston.
1.75 atm
gas pressure has to get round the back of the ring to force it against the cylinder wall
The pressure of the gas is used. Newton's third law requires that the pressure exerted by a gas is equal to the pressure exerted on a gas.You might be wondering, then, how it is possible for the internal pressure to be different from the external pressure. In fact, the difference will be made up for by the piston moving between them. Since we must assume (to avoid infinite accelerations) that there is a piston of finite mass intervening between the two gases, the excess work done (due to the difference in pressures) will go into the kinetic energy of the piston.
A piston cylinder process actually includes two processes. The gas inside the piston undergoes both the constant pressure process and the contant volume process.
Decrease, 4
The pressure is higher than it was at first. A measurement cannot be given from these details.
First you need to know what force is required. The pressure the cylinder is going to work at. From this you can wok out the area of the piston and then the diameter of the piston. Force = Pressure x Area
By deviding the multification of line pressure and screw dia with the crosssectional area of hydralic cylinder piston.
0.738