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प्रश्न
What is the principle of the thermometer?
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उत्तर
The thermometer works on the principle that substances expand on heating and contract on cooling. So we use a thermometric substance which expands and contracts uniformly.
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संबंधित प्रश्न
Name the scientist who designed the first thermometer.
Explain the three modes of transfer of heat.
Explain the following:
In a solid, heat is not transferred by the process of convection.
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 |
A thermostat is a device which maintains _____.
Temperature measures the ______ kinetic energy of molecules.
Figure (a–d) shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature?
For setting curd, a small amount of curd is added to warm milk. The microbes present in the curd help in setting if the temperature of the mixture remains approximately between 35°C to 40°C. At places, where room temperature remains much below the range, setting of curd becomes difficult. Suggest a way to set curd in such a situation.
Give reasons why –
gaps are left between railway tracks
