Which material would you choose to wrap a box of ice cream to prevent it from melting in summers?
Blanket
A blanket is made of a thick, loosely woven fabric that traps a large amount of air within its fibres.
Air is a poor conductor of heat, so the trapped air acts as an insulating layer that slows down the transfer of heat from the warm surroundings into the box.
Aluminium foil, being a metal, is a good conductor of heat and would allow heat to pass into the box quickly, while nylon cloth and plastic foil are thin materials that do not trap enough air to insulate effectively.
Hence, wrapping the ice cream box in a blanket is the best way to prevent it from melting in summer.
Similar Questions
Woolen clothes keep us warm in winter. Which one of the following is reason for this?
(A) Wool is a good conductor of heat.
(B) Air is trapped in between wool fibres which keeps us warm.
(C) Trapped air in woolen clothes prevents the heat transfer from our body to cold surrounding.
(D) Trapped air in woolen clothes does not allow cold air to get inside us.
Important Questions from Heat and Transfer
In summer season, the top and outer surface of the house are painted white because:
On a hot summer afternoon, the tent made up of fabric will be preferred as white colour is:
The coil of wire used in electric heaters is called a/an________.
Transfer of heat by convection can take place in
A body in motion essentially acquires
A. Kinetic energy
B. Potential energy
C. Mechanical energy
D. Heat energy
