Question

which of the following can be compressed

a.) iron
b.) water
c.) air
d.) wooden pieces

Answer 1

air can be compressed

Answer 2

Among the following only air can be compressed. (Option c)

• Water can also be compressed, but it requires a great amount of pressure, therefore it is considered to be incompressible.
• Molecules in the air are far away from each other.
• There is plenty of free space among the molecules.
• The volume occupied by these molecules is negligible when compared to the volume of the air.
• During compression, the molecules have enough space to move about without any restriction.
• This is the reason why air is compressible.