Boyle's Law

Using a hand-operated vacuum pump, we can demonstrate the relationship between pressure and volume of a gas. According to Boyle's law, the pressure of a gas of constant mass and temperature will be inversely proportional to its volume. In our demonstration, we will reduce the ambient pressure within the sealed container, hence allowing the higher

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Polarization Using Sunglasses and a Computer Screen

Using a pair of polarizing sunglasses, you can demonstrate the effects of polarization together with a computer screen which is also polarizing. When the axes of polarization of the two polarizing screens are rotated, the brightness alternates between bright and dark. Light coming from a computer screen is usually polarized. In the video below, when

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Egg out of Flask

In a previous demonstration, we put a boiled egg into a flask with a mouth narrower than the egg. The challenge is now to remove the egg from the flask without breaking it. Materials Flask Egg Water Bunsen burner or candle Procedure Pour some water into the conical flask. Invert the flask quickly over a

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Egg into Flask

This classic physics demonstration is used to show the effects of pressure difference between the atmosphere and a cooling volume of air. With a set of clean apparatus, you can even have the egg for a snack after that. Materials Hard-boiled Egg Flask or glass bottle with mouth smaller than the egg Paper measuring about

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Magnetic Shielding

Materials Bar magnet Paper clip (stainless steel) Plastic clipboard Steel bookend Procedure Before the demonstration, make sure that the paper clip is not already magnetised by touching it with the steel bookend. If it gets attracted to the bookend, get a new paper clip. For the demonstration, first show that the paper clip can be

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