Question

EXAMPLE OF PRESSURE WHERE IT IS NEEDED TO INCREASE AND WHERE IT IS NEEDED OT DECREASE?WHY?(3 EXAMPLE EACH)

Answer 1

Pressure increases as you go deeper into water in a river. At the surface it is the standard atmospheric pressure.  At a depth h its pressure = 1 atm + ρ g h where ρ is density of water, and g is acceleration due to gravity.

Fluid Pressure in pipe of varying size.   A fluid is flowing through a pipe, of different cross-sections at different locations.  Pressure is more at a narrower cross section and lower at the wider cross-section.

Air pressure is more at the surface of earth. The atmospheric pressure decreases as we go up in altitude on mountains etc.

Answer 2

pressure is .less in high altitudes, if we consider a dam having water,pr. is more  in the lower part of the dam ,less in the upper surface.ifwater is passed through a penstock pipe,we can experience more pr.at the ends of the pipe,because of its small surface area of the pipe