A speaker, rated at 2V, draws a current of 3A. It is left switched on for 4 seconds. How much electrical work is done on a speaker?
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Remember the equation for electrical work done
E = P xt= xVxt

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

If steel is more dense that lake water, why can a boat float

The two required components for a generator are