the-BA : A flat dilemma

When a barman pours out a fizzy drink, the carbon dioxide bubbles dissolved in the drink come out of solution and fizz up forming a froth or head. The amount of froth depends on many different factors, but it always decays away after a period of time. For some fizzy drinks (like certain beers), the head can last for quite some time, yet for fizzy soft drinks, the froth can disappear before all the drink is poured out.

Have you ever wondered what affects the froth on top of a fizzy drink?

You might like to …

• investigate how the height of the froth on top of a fizzy drink varies with time once it has been poured; find out if the decay is exponential
• investigate the factors that affect the decay of the froth on top of a fizzy drink
• find out how much carbon dioxide there is in a variety of fizzy drinks
• find out how long it takes fizzy drink to go flat. You could see how this differs depending on its container. For example, if it’s in a screw-top, plastic bottle, a corked glass bottle or an open glass
• develop a procedure to work out the rate at which a fizzy drink goes flat
• investigate how the temperature a drink is stored at affects how quickly it goes flat, for example in a fridge or in a cupboard.

Further links:
http://www.ball-europe.com/382_357_ENG_PHP.html

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