A heat engine operates at 250 cycles per minute. In each cycle, 50.0 joules of heat enter the engine from the hot reservoir. The actual efficiency of the engine is 30.0%. Calculate the power output of the engine in watts.

3. dark matter

empty space could also be a simple vacuum

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j