Thermodynamics and heat engine

[lalahelp]

Homework Statement

A certain engine can propel a 1600 kg car from rest to a speed of 22 m/s in 9.7 s with an efficiency of 23%.

what is the rate of heat flow into the engine at the high temperature?

what is the rate of heat flow out of the engine at the low temperature?

2. Homework Equations

e= 1- (Qout/ Qin)

3. The Attempt at a Solution

for the heat flow into the engine (high temp):
A)K= 0.5mv^2= (0.5)(1600)(22^2)= 387200 J

then I did 387200 J/ (0.23 x 9.7)= 199587.6289 J/s


b)How would I solve for the second part of the question?

 

[jbsteele]

for the heat flow out of the engine (low temp): Qout= (1-e) x Qin but I'm not sure what to use for Qin. Is it the same as Qin from part a?