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प्रश्न
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उत्तर
Water is a bad conductor of heat
An ice cube is wrapped into a wire mesh and is put at the bottom of the glass test tube. The test tube is then heated near the top of the water. It will be noticed that though the water at the top starts boiling, the ice at the bottom does not melt. This clearly shows that water is a poor conductor of heat.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| 1. mercury | 1. insulator |
| 2. wood | 2. water from 0°C to 4°C |
| 3. Aluminum | 3.absorbs |
| 4. contracts | 4.conductor |
| 5.black surface | 5. Thermometer |
What is heat ? State its S.I. unit.
Cooking utensils are made from metals due to their property of ______.
The unit of heat and temperature are the same.
Which of the following substances will absorb more heat energy?
We feel the heat on our body when the ______ shines.
In the arrangements A and B shown in the following figure, pins P and Q are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times? Explain.
What is heat energy?
Heat gained by a body depends upon which factors?
Explain the following effects of heat.
Chemical changes
