Select a few examples that illustrate Bernoulli's principle.
Select a few examples that illustrate Bernoulli's principle.
The correct options are
A Sailing
B Airflight
Blowing off the roofs by wind storms - Storms cause high speed wind and thus creates a low pressure on the top of the roof according to the Bernoulli's principle. But pressure below the roof(inside the room) is atmospheric pressure. This pressure difference causes the roof to lift up.
Aeroplane - The architecture of wings of an aeroplane is based on Bernoulli's principle ie. as the velocity of the air molecules increases, pressure decreases. For an aeroplane, the top of the wing is curved. This causes the speed of the air to increase at the top region and thus creates a low-pressure region. Whereas the bottom wing is totally flat and causes the speed of the air to decrease and thus creates a high-pressure region. So, the air molecules are pushed from the high-pressure(bottom) region to the low-pressure region(upper) and allow the aeroplane to takeoff.
Syringe and straw work like a siphon. In a syringe or straw, the pressure inside it decreases when it is pressed and released. Thus causes the flow of the liquid from a high-pressure region to this low-pressure region. Therefore, syringe or straw do not work on the Bernoulli's principle.
A
Sailing
B
Airflight
Blowing off the roofs by wind storms - Storms cause high speed wind and thus creates a low pressure on the top of the roof according to the Bernoulli's principle. But pressure below the roof(inside the room) is atmospheric pressure. This pressure difference causes the roof to lift up.
Aeroplane - The architecture of wings of an aeroplane is based on Bernoulli's principle ie. as the velocity of the air molecules increases, pressure decreases. For an aeroplane, the top of the wing is curved. This causes the speed of the air to increase at the top region and thus creates a low-pressure region. Whereas the bottom wing is totally flat and causes the speed of the air to decrease and thus creates a high-pressure region. So, the air molecules are pushed from the high-pressure(bottom) region to the low-pressure region(upper) and allow the aeroplane to takeoff.
Syringe and straw work like a siphon. In a syringe or straw, the pressure inside it decreases when it is pressed and released. Thus causes the flow of the liquid from a high-pressure region to this low-pressure region. Therefore, syringe or straw do not work on the Bernoulli's principle.
