efficiency=work output/work input×100
since it exhausts(use up)3000j of heat that's the work input and the 1500j is the work input
efficiency=1500/3000×100
=50%
This is mr day and infact am seeing this… come into my office after class.
The earth spins around the sun. <span>The side facing away is cooler and darker, and experiences </span>night<span>.</span>