In: Physics
A gasoline engine has a power output of 150 kW. If its thermal efficiency is 33%, how much heat must be supplied to keep the engine running for 18 s to reach the end of a street? (in J) (Note: express your answer in scientific notation, for instance: 3.14
We know that
Efficiency = E= Pout / Pin
Pin = Pout/ E
= (150103) /
33%
Pinp = (150)(103)(100)/33
Pinp =454545.45
We know that
W=Q= Pinp(18)
=(454545.45)(18)
=8181818.1J
Q =8.6106
J