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Pressure-Science
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- 1pressure formulaForce/Area
- 2what happens to pressure in water with depths?the pressure in a fluid increases with depth.
- 3Demonstration:Pressure in liquidsThe water coming out of the bottom hole travels the farthest, because it is under the greatest pressure.
- 4air has.....Air has mass
- 5Demonstrations:Air has massWeigh an empty plastic bottle (with the top on) and note the mass.
Pump air into it and weigh it again. Note the new mass.
Result: there was an increase in mass as a result of pumping air in, therefore air has mass.g - 6Air occupies what???Air occupies space
- 7Demonstrations:Air occupies spaceGlue some cotton wool to the bottom of a glass (inside).
Turn the glass upside down, submerge it completely into a large bowl of water and then remove it again.
Notice that the cotton wool is still dry.
Conclusion: the water could not enter the glass because there was air already in there. - 8what does the atmosphere exerts.........The atmosphere exerts pressure
- 9The atmosphere exerts pressure: DEMONSTRATIOMUse a large metal drum and pump the air out using a vacuum pump.
The drum will collapse (implode) because there is now a greater pressure outside acting inwards than there is inside acting outwards. - 10Atmospheric pressure VARIES WITHAtmospheric pressure varies with height
- 11A barometermeasures atmospheric pressure
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- Fichas sobre Pressure-Science, creado por Izzy Fox el 30/05/2016.
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- Izzy Fox
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