One form of this quantity is given by the time-averaged Poynting vector divided by the speed of light.
One form of this quantity is given by the time-averaged Poynting vector divided by the speed of light. It's not viscosity, but the dynamic form of this quantity is given by one-half times density times flow speed squared. The force of particles of light causes the "radiation" form of this quantity. According to Pascal's principle, a change in this quantity anywhere in an incompressible fluid is transmitted throughout. The hydrostatic form of this quantity is equal to density times g times h. The gauge form of this quantity is measured relative to that of the atmosphere in units such as pascals or atms [A T Ms]. For 10 points, name this quantity that is defined as force per unit area.
One form of this quantity is given by the time-averaged Poynting vector divided by the speed of light.
pressure [accept radiation pressure before mentioned; accept acoustic pressure or sound pressure]