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Friday, 20 May 2022

Energy Sources and Transfer of Energy - Physics For Class IX (Science Group) - Self Assessment Questions and Test book Exercise

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Physics For Class IX (Science Group)
UNIT 9: THERMAL PROPERTIES OF MATTER
Self Assessment Questions and Test book Exercise

Self Assessment Questions:

Q.1: Differentiate between heat and temperature.
Ans: Difference Between Heat and Temperature:
S.NO. Heat Temperature
1. It is the form of energy.  It is a degree of hotness of a body.
2. Heat transfers from hot body to cold body as a result of difference of temperature between them. It determines the direction of flow of heat from one body to the other body.
3. Heat of a body is the sum of all kinetic and potential energy of all the molecules constituting the body Temperature of a body is the average kinetic nergy of its molecules.
4. Heat can be measures by a calorimeter. Temperature of a body is measured by a thermometer.
5. Its SI unit is joule. Its other unit is calorie. SI unit of temperature is Kelvin. Its other units are Celsius (C) and Fahrenheit (F).

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