Fichas
pressure in fluids
Fichas del conjunto (14)
- 1Thrust
- 2Pressure
- 3lateral pressurePressure exerted by the fluid on the sides on the containing vessel.
- 4formula for pressure at a pointp=hdg
h is depth from the free surface
d is density of the liquid
g is acceleration due to gravity - 5Laws of liquid pressure1. pressure at a point inside the liquid increases with depth from the free surface of the liquid
2. pressure at a point inside the liquid at a given depth increases with the increase in the density of the liquid
3. pressure is same in all directions about a given point within the liquid.
4. fresher is same at all points in a horizontal plane at a given depth in a stationary liquid.
5. a liquid seeks its own level. - 6Q. why are the walls of a dam made thicker at the bottom?at the bottom of the damn liquid pressure is maximum so maximum pressure is applied at the bottom of the Dam . A strong and thick wall is required to protect the dam from maximum liquid pressure .
- 7Q. why do divers use special protective suit for diving in sea?As the sea divers go in depth of the sea the liquid pressure also increases the total liquid pressure is much more than the blood pressure of the body which exerts on the body of diver to compensate this the diverse you have to wear protective suit.
- 8Pascal's lawWhenever any pressure is applied to any part of the boundary of a confined fluid it is transmitted equally in all directions irrespective of the area on which attacks and always acts at right angles to the surface of the containing vessel.
- 9what is atmospheric pressurethe force exerted by air on a unit surface area is called atmospheric pressure
- 10what is the magnitude of average atmospheric pressure on the surface of the earth?10,000 kgf m-²
10000 Pa - 11what is a barometer?The instrument used for measurement of pressure is called barometer. It was constructed by torricelli in 1643.
- 12what does a simple barometer look like?
- 13a little bit more about a simple barometer
- 14what are the factors that do not affect the barometric height?vertical height is independent of the shape or the size of the tube.
it does not change if the tube is tilted