02 November 2011
20:01
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Why do the eggs get sucked into the bottles?!
Explanation
· The burning paper in the bottle heats the air in the bottle
· When the egg gets placed on top, the oxygen supply in the bottle is rapidly depleted and the paper goes out
· The bottle is sealed by the egg and now has a constant volume of gas inside
· The hot gas in the bottle now starts to cool which reduces the pressure inside the bottle
· The pressure outside the bottle remains unchanged and so there is now an unbalanced force on the egg which accelerates the egg into the bottle
5.17
28 October 2011
11:11
· 5.17 describe the qualitative relationship between pressure and Kelvin temperature for a gas in a sealed container
Instructions
· Launch the application on this website: http://phet.colorado.edu/en/simulation/gas-properties
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· Put 5 pumps of gas in
· Set volume as the Constant Parameter
· Heat to 1000K
· Watch what happens to the Pressure
Conclusion
· If you increase the temperature, you increase the pressure
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