APPLICATION OF BERNOULLI’S PRINCIPLE

1. Aerofoil

Wings of aeroplane is built in a shape of aerofoil. For a plane to lift off it has to create an upward force. The wings of an aircraft is designed in a shape of aerofoil to enable the lift to be created. When a plane rolls down the runway with increasing speed, the wing flap is pointing downwards. This will create a huge lifting force upwards and the plane will take off. When a wing in the form of an aerofoil moves in air, the flow of air over the top travels faster and creates a region of low pressure. The flow of air below the wing is slower resulting in a region of higher pressure. The difference between the pressures at the top and underside of the wing causes a net upward force, called lift, which helps the plane to take-off. 

2. Insect Spray

When the plunger is pushed in, the air flows at a high velocity through a nozzle. The flow of air at high velocity creates a region of low pressure above the metal tube. The higher pressure of the atmospheric air acts on the surface of the liquid insecticide causing it to rise up the metal tube. The insecticide leaves the top of the metal tube through the nozzle as a fine spray.

3. How Bunsen burner works

The gas fuel is supplied to the Bunsen burner through the gas inlet. The speed of the gas is high. It creates a low-pressure area. This causes the air to rush into the burner through the air hole. This mixture of air and gases rises to the opening of the chimney where it is burned. The mixture of gas and air enables the gas to burn completely to produce a clean, hot, and smokeless flame