Draw a labelled diagram to show the transfer of heat by convection, when water taken in a flask is heated.
Important Questions on Heat and Its Effects
How is radiation different from conduction and convection for transfer of heat?
Nikita's neighbour Mrs Sharma is an old lady and lives alone. She doesn't keep well. Nikita takes some hot home-made vegetable soup made by her mother, in a thermos flask for her.
Why does Nikita's mother use a thermos flask?
Nikita's neighbour Mrs Sharma is an old lady and lives alone. She doesn't keep well. Nikita takes some hot home-made vegetable soup made by her mother, in a thermos flask for her.
What value can we learn from Nikita?
Describe the construction of a clinical thermometer. How should we use a clinical thermometer?
Give reasons for the following:
Cooking utensils are made up of metals.
Give reasons for the following:
Pressure cooker is provided with bakelite handle.
Give reasons for the following:
Air conditioned buildings have double-walled windows.
Draw a labelled diagram of a thermos flask.
