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Thermodynamics (Work (The energy transfer associated with a force acting…
Thermodynamics
Work
The energy transfer associated with a force acting through a distance
Type of Work
nonmechanical forms of work
electrical 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.
W= VI
magnetic work
Central to integrating magnetic fields and magnetizable systems into the First Law of Thermodynamics is a formulation of magnetic work.
δWM=−δt∫ J⋅EdV.
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
shaft work
rotation of shaft
W= Pi NT
eg: crank shaft
spring work
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
group handsome
ikmal
akoi
wan
2018236022
2018284214
2018433578