Pressure is the amount of force applied to a given area. It is measured using units of force divided by area, such as pounds per square inch (psi) or pascals (Pa).
2)Pressure can cause objects to change shape or volume, depending on their material properties. For example, high pressure can compress gases, while low pressure can expand them.
3)Absolute pressure is the total pressure exerted by a fluid, including atmospheric pressure. Gauge pressure is the difference between the absolute pressure and atmospheric pressure, and is typically used in pressure measurements.
4)No, pressure and force are related but not the same. While force is a direct result of energy applied to an object, pressure takes into account the area over which the force is spread.
5)Pressure can be changed in a closed system by altering the volume or temperature of the system. For example, decreasing the volume of a gas in a closed container will increase its pressure, while increasing the temperature will also increase the pressure.