What is the principle by which a cooling system(Radiator) in a motor car works:

A system which can exchange both energy and matter with the surroundings is called:

In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?

In which of the following types of heat engines carburetor is used?

Which of the following statement is correct?

Which of the following is not a method of heat transfer?