SM. Teknik Kuala Lumpur Physics Module Form 4 Chapter 4: Heat 2 6. ( Heat , Temperature ) is a form of energy. It flows from a hot body to a cold body. 7. The SI unit for ( heat , temperature) is Joule, J. 8. ( H eat , Temperature ) is the degree of hotness of a body 9. The SI unit for ( heat , temperature ) is Kelvin, K. 10. Lower fixed point ( l 0 ) / ice point : the temperature of pure melting ice/0 0 C 11. Upper fixed point( l 100 ) /steam point: the temperature of steam from water that is boiling under standard atmospheric pressure /100 0 C Section B: Answer all the questions by showing the calculation 1. The length of the mercury column at the ice point and steam point are 5.0 cm and 40.0cm respectively. When the thermometer is immersed in the liquid P, the length of the mercury column is 23.0 cm. What is the temperature of the liquid P? Temperature, θ = l θ – l 0 x 100 0 C l 100 – l 0 θ = 23 – 5 x 100 0 C 40 - 5 θ = 51.43 0 C l 0 : length of mercury at ice point l 100 : length of mercury at steam point l θ : len th of mercur at θ oint Temperature, θ = l θ - l 0 l 100 - l 0 0