Advertisements
Advertisements
प्रश्न
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.

Advertisements
उत्तर
In case B, the pin P will fall before the pin Q because the heat will reach pin P first. In case A, the heat travels in both directions and pins P and Q will fall simultaneously.
APPEARS IN
संबंधित प्रश्न
Define the term heat.
Cooking utensils are made from metals due to their property of ______.
What will absorb heat?
Iron griddle (tava)
Find the odd one out and give its explanation.
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
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?
The water in the black can becomes ______ than that in a white can after exposure to the sun.
In which of the following, chemical energy is converted into heat energy?
Match the following:
| Column A | Column B | ||
| 1. | Heat | a. | Heat gained or lost in the change of state without any change in temperature |
| 2. | m × L. | b. | Heat gained or lost when there is no change of state |
| 3. | Temperature | c. | Form of energy |
| 4. | m × s × t | d. | SI unit of specific latent heat |
| 5. | J/Kg | e. | degree of hotness or coldness |
