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

 we can move hand in we can move hand in air is leave because its molecule can easily the displays it is so because they have very less force between them. Particles of would have very less space left among them in the force of attraction is Greater there so for moving our hand though a solid block of wood far greater force is needed which is possible only for an expert of karate