Give reasons:

We can easily move our hands in the air but to do the same through a solid block of wood we need a karate expert.

 

Answer

Moving hand.png

The particles of air (gas) have very less force of attraction between them,  thus causing large intermolecular spaces

whereas the particles of solids are very tightly packed due to very high force of attraction between its particles.

 

Due to the difference in the amount of space between the particles , we can easily move our hand in air but to do the same through a solid block of wood we need a karate expert (who uses technique and large force).

breaking wood by karate expert.gif

  1. Class 9
  2. Chapter 1 Class 9 - Matter In Our Surroundings (Deleted)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo