Difference between pressure and force?
Pressure is scalar but force is a vector.
Pressure is defined as the force per unit area.
As we multiply area vector by the pressure which is scalar, we get the force vector. This is similar to get momentum vector by multiplying velocity vector by the mass which is scalar.
Unit of force is newton but unit for pressure is N m-2
Yes, there are many ways to measure pressure. * pascal (Pa) * bar * technical atmosphere (at) * atmosphere (atm) * torr (Torr) * pound-force per square inch (psi) * psia (pounds-force per square inch absolute) --- gauge pressure plus local atmospheric pressure. * psid (psi difference) --- difference between two pressures. * psig (pounds-force per square inch gauge). * psivg (psi vented gauge) --- difference between the measuring point and the local pressure. *…
a vacuum is simply an empty or almost empty space. The forces that are apparent with vacuums are due to a pressure imbalance between the inside of the vacuum (low pressure) and the outside of the vacuum (high pressure) causing particles to want to migrate to areas of lower pressure. The effect of this pressure difference is often refered to as a vacuum force
Two numbers are used to represent blood pressure. Systolic pressure (the first and larger number of the equation) is the force that the blood flows from the heart into the arteries. Diastolic pressure (the second and smaller number of the equation) is the force as the heart relaxes, allowing the blood to flow back into the heart.