How do we measure atmospheric pressure? is atmospheric pressure the same everywhere on the surface of earth?

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.