SIMPLE LIFTING MACHINE SIMPLE MACHINE:  - It is a device, which enable to do some useful work at some point or to overcome resistance, whe...

  TOTAL PRESSURE AND CENTRE OF PRESSURE Total Pressure: - It is the force exerted by fluid in rest on a surface. Centre of Pressure: - I...

PROPERTIES OF GASES IN NON FLOW PROCESS PERFECT/ IDEAL GAS:- Those gases obey all the gas law under all condition of pressure and temperatur...