State two factors which affect the atmospheric pressure as we go up.

Short/Brief Note

Factors which affect the atmospheric pressure as we go up are:
(i) Weight of gaseous column.
(ii) Density of gaseous column.

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Chapter 4: Fluids - Exercise 3 [Page 177]

Chapter 4 Fluids
Exercise 3 | Q 27 | Page 177

Name the physical quantity which is expressed in the unit 'atm'. State its value in pascal.

Explain the following :

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How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?

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