It depends on what process is changing the volume.
For example:
the volume of fluid in a displacement experiment, or
change in volume due to thermal expansion, or
change in volume due to gravitational collapse (as in a dying star).
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initial - final / initial x 100
certain fluid at 10 bar is contained in cylinder behind a piston ,the initial volume being 0.05 m3 calculate the work done by the fluid when it expands reversibly i) according to a law P=(A/ V2 ) -(B/ V) ,to a final volume of 0.1 m3 and a pressure of 1bar,where A and B are constants.Answer(19200 j)
Calculate the volume of one sweet. Calculate the volume of the jar and then divide the volume of the jar by the volume of a sweet.
v1 = initial velocity v2 = final velocity
1) Calculate the area 2) Calculate the volume 3) Divide the area by the volume to get the ratio