Question

Can someone check my work. An engine absorbs 3000 J of heat, and exhaust 1200J of heat, how much mechanical work is done by the engine? What is its efficiency?

Answer 1

Here is my work. 3000j-1200j= 1800j

Answer 2

after that I got stuck

Answer 3

the efficiency is the work done / absorb energy

Answer 4

so in ur case its going to be

Answer 5

1800/3000

Answer 6

give ur answer for efficiency in %