Thermodynamics (Work (The energy transfer associated with a force acting…
The energy transfer associated with a force acting through a distance
Type of Work
nonmechanical forms of work
the rate of electrical work done by electrons crossing a system is called electrical power and is given by the product of the voltage drop in volts and the current in amps.
Central to integrating magnetic fields and magnetizable systems into the First Law of Thermodynamics is a formulation of magnetic work.
electrical polarization work :
Electric polarization, slight relative shift of positive and negative electric charge in opposite directions within an insulator, or dielectric
mechanical forms of work
rotation of shaft
W= Pi NT
eg: crank shaft
when a force is applied on a spring, the length of the spring is changes
work done on elastic solid bars
when the force is lifted, they return to their original lengths, like a spring.
W= Intergration of F = Intergration of Normal Stress x Area
Work associated with the Stretching of a Liquid Film
known as surface tension
W= Intergration of Normal Stress x dA
Work done to raise or to accelerate a body
when a body is raise in a gravitational field,its potential energy increases