Question

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

Answer 1

Explanation:

AB BECAUSE GAS MOLECULES ARE LOOSELY PACKED AS COMPARED TO THE MOLECULES OF SOLID ...

OR IN ANOTHER WAY WE CAN SAY THAT THERE IS MORE MASS PER UNIT VOLUME OR MORE DENSITY OF SOLID MAKE IT DIFFICULT TO MOVE OUR HANDS EASILY ...

Answer 2

Air is a gas, it has more space in between particles. But solid block of wood is rigid, hence it is difficult to move our hands through it.