Question

Pascal's Law involves the use of the word - "enclosed fluid".......so how can we apply Pascal's Law in the case of atmospheric pressure?

Answer 1

Well atmosphere is also enclosed by the range of gravitational force,so that air molecules until receiving escape velocity can't go out of the effects of gravity.

So,you can imagine a shell outside the earth's surface which is representing the limit of gravitational field,within which atmosphere is enclosed.

So,atmosphere is also becoming enclosed fluid.