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ATMOSPHERIC PRESSURE

ATMOSPHERIC PRESSURE. By Nikka Asuncion G. Lustiva And Friends . 1 ATMOSPHERE OF PRESSURE Barometer - is an instrument that is used to measure the atmospheric pressure which changes with your altitude and with the weather. APPLICATIONS OF PRESSURE.

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ATMOSPHERIC PRESSURE

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  1. ATMOSPHERIC PRESSURE By Nikka Asuncion G. Lustiva And Friends 

  2. 1 ATMOSPHERE OF PRESSURE Barometer - is an instrument that is used to measure the atmospheric pressure which changes with your altitude and with the weather

  3. APPLICATIONS OF PRESSURE • Dams – are barriers constructed across a stream or river to impound water and raise its level • dams concentrate natural fall of a river thus generating electricity • Direct water from rivers to canals and irrigation and water supply systems • Control water flow during times of flood and drought • Create artificial lakes for recreational use

  4. HYDRAULICS • - is the application of fluid mechanics to engineering devices involving liquid usu water or oil. It deals with such problems as the flow of fluids through pipes or in open channels and the3 design of storage dams, pumps and water turbines

  5. BLOOD PRESSURE CHECK • A patient’s blood pressure is checked through the use of a sphygmomanometer.

  6. Buoyancy • The Greek philosopher Archimedes discovered the relationship between buoyancy and displaced liquid. Buoyancy- tendency to float

  7. Archimedes’ Principle of Buoyancy • An animated object is buoyed up by a force equal to the weight of the fluid it displaces Buoyant force = weight of displaced fluid Fbuoyant= weight of displaced fluid F= p g v

  8. BUOYANCY: SINK OR FLOAT? If the density of the block is more than the density of the water (or fluid) the buoyant force is less than the weight and the block will sink Sink: dblock> dwater If the density of the block is less than the density of the fluid, the buoyant force can equal the weight and the block will float Float= dblock < dwater

  9. BUOYANCY IN AIR The same buoyancy happens in air. This is how hot air balloons fly. By heating this air and lowering the density of the air in the balloon floats in the unheated (more dense) air.

  10. AIR RESISTANCE If you drop a feather and a cannonball at the same time, from the same height, which will hit the ground first? the cannonball ofcourse, the feather takes longer because its mass has much more surface area bouncing against air molecules than the cannonball. Air resistance slows it down

  11. FLUID FLOW • Fluids in motion often behave in complex and unpredictable ways. Viscosity is the term used to describe internal frictional resistance in a fluid. R= vtA/t=vA The rate of flow is the product of the liquid speed and the cross sectional area

  12. BERNOULLI’S EQUATION • P1 + pgh1 + ½ p vi2 = P2 + pgh2 + ½ p v22

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