Force - A push or pull acting upon a body. In a hydraulic cylinder, it is the product of the pressure on the fluid, multiplied by the effective area of the cylinder piston. It is measured in pounds or tons. Friction - The resistance to fluid flow in a hy- draulic system.
temperature increase The pressure of a contained sample of gas can be increased by increasing its temperature, or by decreasing its volume, or by injecting additional mas â¦ s into it.
1 Explain that the vapor pressure of a liquid increases as its temperature increases. 2  Explain that boiling point increases as external pressure increases. 3  Explain that vapor pressure is unaffected by changes in external pressure.  Define boiling point as the point at which vapor pressure equals external pressure.