explain two or three examples where reducing of pressure is necessary and increasing of pressure is necessary std 9
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Physical nature of matter
Matter is made up of particles
How small are these particles of matter?
Particles of matter are continuously moving
Characteristics of particles of matter
Particles of matter have space between them
Particles of matter attract each other
States of matter
The liquid state
The solid state
The gaseous state
Can matter change its state?
Effect of change of temperature
Effect of change of pressure
Evaporation
Factors affecting evaporation
How does evaporation cause cooling
nirliptabaisakhi:
ye pressure ke baare me hai
hi
answer galat hai ji
hlo
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