Question

we can easily move our hands in air but to do the same to the solid block of wood we need a Karate expert give reason​

Answer 1

because the intermolecular force between the particle of air is very less compared to to the intermolecular space between the particles of solid block of wood so when we move hand in air does we do not need to apply any special force to do so but in solid we have to apply much more force like a Karate expert to do so

Answer 2

$\huge\mathfrak{\underline{\underline{Because:-}}}$

There is a lots of empty space between the particles of gas but it not so in case of solids.