Jawabanmu

2014-06-11T18:30:16+07:00
Efisiensi = W/Q1
1 - T2/T1 = W/Q1
1 - 450/800 = W/1000
1- 0,5625 = W/1000
0,4375 = W/1000
W = 437,5 J
2 1 2