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Application of physics science fair projects to real life problems...
There are a lot of reasons why you would want to learn how to make a can cool fastest. You could be hosting a party and need to chill your beverages quickly before your guests arrive, you could be dieing for a cold drink or you could need a project for your science class. No matter what the reason, learning to cool things quickly is an interesting science project.  
The first step in learning how to make a can cool fastest is to identify various traditional ways to cool a can. The oldest way to cool items is to tether the item to a stationary object and then place the item in a stream. Another traditional way to cool things down is to surround them with ice. The next step is to identify modern ways of cooling objects down. Obvious placing the object in the refrigerator or freezer are the most common modern methods of cooling an object, but there are other ways. In science labs liquid nitrogen is used to bring the temperature of an object to well below freezing in a matter of seconds. Now that you have a variety of ways of cooling a can, you are ready to set up your physics science fair projects. First of all you will need to come up with a hypothesis to test. A good one is simply "how to make a can cool fastest?" The science experiment that you develop will need to answer this questions. To test your hypothesis you will first need to identify the cooling methodologies that you plan to use for your experiment. In this case you can use ice, dry ice, a refrigerator, a freezer and liquid nitrogen. Next you will identify your test subject, a can of pop. Before you cool your cans you will need to bring them up to room temperature. This can be accomplished by leaving the cans out on a counter over night. Before you start cooling down your cans you will pop the top of your control can, the can that won't be cooled, and take its temperature. This will be the starting temperature for all of the cans. Next start the cooling process by placing the can in a container of ice, placing a can in the fridge, etc. Wait about 15 minutes and remove the cans from the cooling source and measure their internal temperatures immediately. You may want to stagger the testing to make this step more manageable. Note the differences in temperatures and determine a winner. Your final step is to create your science report for your project.
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