Abay : high school physics tutorial

Grade12 chapter 1
# The second law of thermodynamic is also known as the law of impossible .
# it is impossible to make a perfect heat engine with 100% efficiency and a perfect refrigerator with coefficient of performance (cop) infinity .
# it is impossible to flow heat from cold body to hot body spontaneously .
# it is impossible to make a perfect reversible process.

Grade12 chapter 1
# the third law of thermodynamic state that" it is impossible to reach a substance at absolute zero temperature .
zero temperature (0K) is the temperature at which all the energy of the substance become zero and there is no molecular motion at all.

Grade-12. Ch1
# the first law of thermodynamic is the restatement of the law of conservation of energy as:
Q=U+W