Advertisements
Advertisements
प्रश्न
To keep her soup warm Paheli wrapped the container in which it was kept with a woollen cloth. Can she apply the same method to keep a glass of cold drink cool? Give reason for your answer.
Advertisements
उत्तर
Yes, she can apply the same method to keep a glass of cold drink cool because wool is a poor conductor of heat.
APPEARS IN
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 |
Select the correct alternative
A thermometer uses
What will absorb heat?
Soil
Give scientific reason.
Dew drops form on the grass in winter.
Write scientific reason.
In the cold regions, snow falls in winter.
If you apply some heat energy to a substance, which of the following can take place in it?
A circular metal loop is heated at point O as shown in the following figure.
- In which direction would heat flow in the loop?
- In which order are the pins at points P, Q and R fixed with the help of wax fall if points O, P, Q and R are equidistant from each other?
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.
Arrange the following in order of decreasing the expansion of heating: Steel, milk, air.
In which of the following, chemical energy is converted into heat energy?
