Boyle's Law
Richard Towneley and Henry Power two new scientist first noted the relation between volume and pressure. Robert Boyle confirmed their discovery though experiments then published the results. At the time air was seen as one of the elements of life, but this differed from Boyle as he disagreed. In Boyles experiment he used a closed j-shaped tube and poured mercury into one side. By doing this he caused the air on the other side to contract under the pressure. After trying different amounts of mercury he concluded that the pressure of gas is inversely proportional to the volume. In 1676 Edme Mariotte, a French physicist discovered the same law, but Boyle had already published it in 1662. Boyles law was the first physical law to express in a equation describing two variable quantities.
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P1V1=P2V2
Boyles law relates pressure and volume though an inverse relation. This law only applies if there the if the temperature and amount of gas remain unchanged in a closed system.
EXAMPLES
Syringe: When some one pulls back the plunger of a syringe it causes the volume to increase therefore creating a vacuum in the syringe, which pulls back the liquid that is on the other side, often blood.
Firefighters Air Tank: When the valve is opened for a small amount to the tank that holds compress air it will release a small amount of over a long period of time due to that the that is pressurize an can hold a large amount of air.
Firefighters Air Tank: When the valve is opened for a small amount to the tank that holds compress air it will release a small amount of over a long period of time due to that the that is pressurize an can hold a large amount of air.
QUESTION And Demonstration
To demonstrate this law one could setup a closed syringe that has been extended all the way in a brace. Then start putting weight on it, after each increment of weight the volume of the gas would be measured. After the data is taken, it can be placed on a graph to view the relationship between volume and pressure.
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