Sunday, January 22, 2017

thermodynamics - Adiabatic equation of an ideal gas


Why in the adiabatic equation of an ideal gas do we take dU=C(v)dT , where C(v) is the specific heat capacity at constant volume ? I mean that in an adiabatic expansion or compression the Volume doesn't stay constant so why do we take C(v) ?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...