Question

Give reason for the following :
(a) Cooking utensils are made of metals.
(b) Pressure cooker is provided with bakelite handle.
(c) Air conditioned buildings have double-walled windows.
(d) False ceiling keeps the room warm during winters.
(e) Asbestos sheets are preferred over iron sheets for roofing​

Answer 1

Answer:

(a) to conduct heat more easily and uniformly

(b) to insulate heat from the metal

(c) to insulate the room from surroundings

(d) same reason as (c)

(e) because iron rusts easily

Explanation:

(a) specific heat capacity is less therefore conduction is more

(b) specific heat capacity is more therefore conduction is less

(c) air is a good insulator therefore it does not allow the heat to flow

(d) same as (c)

(e) to have a longer product life