7. Define absolute zero temperature.
8. Mention the significance of zeroth law of thermodynamics.
9. How does an average kinetic energy of a gas molecule depend on the absolute temperature?
10. What are beats?
Answers
1-------The cool object grows warmer. Now the zero in absolute zero makes sense: Absolute zero is the temperature at which the particles in a substance are essentially motionless. There's no way to slow them down further, so there can be no lower temperature.
2------The zeroth law is incredibly important as it allows us to define the concept of a temperature scale. If two systems are each in thermal equilibrium with a third, they are also in thermal equilibrium with each other.The thermometer is therefore also in thermal equilibrium with the second cup of water.
3------Gas particles are in a constant state of random motion and move in straight lines until they collide with another body.The average kinetic energy of gas molecules is directly proportional to absolute temperature only; this implies that all molecular motion ceases if the temperature is reduced to absolute zero.
4------ A beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies.