Advertisements
Advertisements
प्रश्न
Is it possible to heat a liquid or gas from above? Explain your answer.
उत्तर
No, it is not possible to heat a liquid or gas from above because the transfer of heat through convection takes place vertically upwards in liquids and gases. So if they are heated from above, the liquid or gas at the top will only be heated because most liquids and gases are themselves bad conductors of heat so they cannot conduct heat from the top layer to the bottom layer.
APPEARS IN
संबंधित प्रश्न
Temperature is the measures of the ______ Kinetic energy of the atoms in a substance.
Explain the construction of a calorimeter. Draw the necessary figure.
Two substances A and B have specific heats c and 2 c respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperatures is the same. If the mass of A is m, what is the mass of B?
Why do telephone wires sag during summer?
State one use of each of the following type of thermometer:
Laboratory thermometer
Explain the following:
Why is the cooling in a refrigerator kept near the top?
SI unit of temperature is ______.
Heat energy flows from a body at a low temperature to a body at a higher temperature.
Match the following:
| Column-I | Column-II | |
| 1. | Length | s |
| 2. | Mass | m |
| 3. | Time | k |
| 4. | Temperature | kg |
What will be the final temperature if 1,68,000 J of heat is absorbed by 2 kg of water at 30°C?
