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प्रश्न
Distinguish between heat and temperature.
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उत्तर
Heat is a form of energy obtained due to the random motion of molecules in a substance but temperature is a quantity which decided the direction of flow of heat when two bodies at different temperature are placed in contact. Two quantities having the same amount of heat may differ in temperature.
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संबंधित प्रश्न
Name the S.I. unit of heat and how is it related to the unit calorie?
Name two substances which contract on heating.
Why does a piece of ice when touched with hands appear cold?
Define coefficient of linear expansion. Write its SI unit.
Explain the following:
Water is heated generally from below.
State the advantages and disadvantages of mercury and alcohol as thermometric liquids.
State one use of each of the following type of thermometer:
Six's maximum and minimum thermometer.
Match the following
| 1. | Heat | 0o C |
| 2. | Temperature | 100o C |
| 3. | Thermal Equilibrium | kelvin |
| 4. | Ice cube | No heat flow |
| 5. | Boiling water | joule |
Figure (a–d) shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature?
Temperature is a measure of the average kinetic energy of molecules.
