What is Carnot cycle?

What is Kreb's cycle? Explain briefly.

What is Oxygen cycle?

Why should a Carnot cycle have two isothermal two adiabatic processes?

What is nitrogen cycle?

Carbon cylce: Why is carbon cycle called bio-geo chemical cycle?

Efficiency of a Carnot cycle is 75% .If temperature of the hot reservoir is 727^@C , calculate the temperature of the cold reservoir.

The efficiency of a Carnot cycle is 1/6 . If on reducing the temperature of the sink by 65^@C , the efficiency becomes 1/3 , find the initial and final temperatures between which the cycle is working.

Consider a Carnot 's cycle operating between T_1 = 500 K and T_2 = 300 K producing 1 kJ of mechanical work per cycle. Find the heat transferred to the enginer by the reservoirs.

What is cell cycle?