AWABS - Pressure and Force Flashcards
Force definition
That which changes the state of rest or motion of an object
SI unit of force
Newton (N)
Force equation
Force = mass x acceleration
Pressure equation
Pressure = Force / Area
SI unit of pressure
Pascal (Pa)
Conversion of units of pressure
1 Atm = 101.3 kPa
1 Bar = 100 kPa
1 kPa = 10.3 cmH2O
1 kPa = 7.5 mmHg
Absolute pressure
Absolute pressure = Gauge pressure + Atmospheric pressure
Devices to measure pressure
Barometer / Manometer - mmHg or cmH2O
Mechanical gauges - Bourdon gauge
Pressure transducer - strain gauge
Manometer
Bourdon gauge
Transducer definition
Transducer converts energy from one form to another
Strain gauge description
Strain gauge in clinical practice
Wheatstone bridge