4.5.5.2 Atmospheric pressure

Spec reference: 4.5.5.2 (physics only).

Triple-only content in this dot

• Atmospheric pressure caused by air molecule collisions.
• Pressure decreases with height because less air is above the surface.

Exam quick-check

• Can I identify this as a triple-only point from wording in the question?
• Can I apply the correct equation/idea with units and a clear conclusion?