Depends on temperature, cos if heat is gained (outside
temperature hotter), the internal energy (U) increases (take it as
closed system), therefore Energy of the system is = mass x U since
the boundary can be taken as fixed and unchanged, therefore we do
not take into account boundary work Wb.. since energy is needed to
maintain erection, the more energy u have, the longer u can
sustain.
come, jit ba hoon hor wa
