What is diffusion pressure deficit?

Explain diffusion pressure deficit (D.P.D).

What is osmotic pressure?

What is atmospheric pressure ?

What is absolute pressure at a depth h below the surface of the liquid?

1mm^3 of a gas is compressed at 1 atmospheric pressure and temperature 27^@C to 627^@C . What is the final pressure under adiabatic condition (gamma for the gas =1.5 )

Define diffusion.

What is gauge pressure?

What is atmospheric pressure of air?

What is vapour pressure of a liquid?

What atmospheric pressure ?