Question

A thermos bottle contains coffee. The thermos bottle is vigorously shaken. Consider coffee as the system, it's temperature :

• A. rises
• B. falls
• C. remains the same
• D. fall below $0$

Answer 1

The correct option is A rises

The correct answer is option(A).

Since the thermos bottle is vigorously shaken, the kinetic energy of molecules in the coffee will be increased. As the temperature is directly proportional to the average kinetic energy of the molecule, therefore temperature of the coffee will be increased.