Question

Consider the following statements about vertical profile of atmosphere. Choose the correct statements.
A. Mean free path increases with increase in the height above sea.
B. Mean free path is independent of the height above sea.
C. Pressure decreases with increase in the height above sea.
D. Density decreases with increase in the height above sea.
E. Density increases with increase in the height above sea.
 

• A. A, C only
• B. B, C, E only
• C. B, C, D only
• D. A, C, D only

Hint:

Remember: Both pressure and density decrease with altitude (governed by the hydrostatic equation). Mean free path increases with altitude because fewer molecules per unit volume means each molecule travels farther before colliding.

Answer 1

The Correct Option is D