Question

(d) We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.​

Answer 1

Answer:

As we know that solids have very less space between their particles and gasses have much more spaces between them . So it is easy for us to move our hand in the air but to do the same through a solid block of wood we need a karate expert .

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Explanation:

Answer 2

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d) Molecules in gases are loosely packed as compared to solid molecules which are densely packed.

Hence we are easily able to break the force of attraction when we move our hand through air but find it difficult to break through a solid (because of greater forces of attraction between molecules) which a karate expert is able to smash with the application of a lot of force.

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