1. Pascal's principle states that the transmission of pressure exerted on a fluid (liqiod or gas) in an enclosed system is uniform throughout the fluid and in all directions.

2. Operating principle of hydraulic system

• the transmission of pressure on all directions 
• the hydralic system is made up of 2 cylindrical pistons of different surface areas
• the fluid is water or oil
• pressure exerted by the small piston is the same as the pressure produced at the large piston 

• Application of Pascal's Principle in daily life
  • Hydralic jack system
  • Hydralic breake system
  • Dental chair

3. Bernoulli's principle: when the fluid flows through the narrow part, its velocity increases and the pressure in that region decreases

• application of Bernoulli's principle in daily life
  • aerofoil-shaped wings of an aeroplane
  • bunsen burner
  • helicopter
  • drone
  • safety lines nearby tracks at railway station