For an ideal heat engine, the temperature of the source is $127 ^ { \circ } \mathrm { C }$. In order to have $60 \%$ efficiency the temperature of the sink should be $\_\_\_\_$ ${}^{\circ}$C. (Round off to the nearest integer)
For an ideal heat engine, the temperature of the source is $127 ^ { \circ } \mathrm { C }$. In order to have $60 \%$ efficiency the temperature of the sink should be $\_\_\_\_$ ${}^{\circ}$C. (Round off to the nearest integer)