Estimate the maximum efficiency of a thermodynamic engine that is powered by this temperature difference in moderate climate conditions (the living organism is the hot reservoir and the environment is the cold reservoir). take the temperature of the human body about 37∘c and assume a temperature of 8 ∘c for the environment.

The maximum efficiency of this thermodynamic engine is η=0.78

Explanation:

The maximum efficiency of a thermodynamic engine is consequence of the Maximum Work Theorem, and corresponds to a Carnot Cycle.

The expression is given by

where is the temperature of the cold reservoir, and is the temperature of the hot reservoir, therefore

is the maximum efficiency of this thermodynamic engine.

* It should be noted that a Carnot Cycle is not possible in real engines, it is a theoric tool that allows the development of the thermodynamic engines.

a women have faced negative attitudes in some areas , but other

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​