My teacher proposed a challenge to my class:Obtain an aluminum canYou will be placing water inside the can, heating it on a hot plate, and use tongs to immediately submerge it in cold waterWhomever has a can that crushes inward the most, gets extra creditHow much water should I put in the soda can when heating it? How far should I actually open the can? Any way I can quot;modifyquot; my can?Please don't feel constrained solely to the above questions, all input is appreciatedThank you very much!
I would make Ham and Scalloped potatoesUse half and half and heavy cream instead of milkAnd make sure liquid is hot when you pour it into the cassarole dishSlice potatoes very thin and layer with onions, peas and a little butter and a sprinkle of flour.
Mashed potatoes or cream of potato soup
~scalloped peel and slice (like potato chips) put in a bake pan and add butter also can add onions cover with foil and back till tender ~potato salad ~ mashed potatoes ~ hash browns ~ i like this one but i don't know the name sautee ground beef with onions or add peas later so the don't smash and put in baking banadd mashed potato on topsmaking little hills but cover completely bake in over till mounds become slightly brown~ cream of potato soup ~ corn chowder soup
homemade fries make mashed then use leftover to make potato pancakes or crockettes potato skins with bacon and chedder chowder soups stews
This is a demonstration of air pressure, which is around 14 poounds per square inchWhen water inside the can boils, it becomes a gas which then pushes all the air out of the canIf the can suddenly cools, the steam condenses back into a liquid, creating nearly a prefect vacuumAir pressure outside the can then crushes itThis works with some fairly large sized containers as wellThe most dramatic was an oil drum which imploded with an enormous bangWhat you want to do is eliminate all the water from the can so that there is only steam presentThe water won't concense and will subtract from the crushing forceNext, you want to seal the can as much as possibleAs the can cools, air will rush in the opening and this will subtract from the crushing force even more than extra water willWhat you can do is pour a known amount of water in the can and boil it for awhilebefore all the water is gone, cool the can and measure the change in volumeThe change in volume divided by the change in time is the rate of boilingKnowing this, you can very accurately predict when the last of the liquid water will boil for a given amount addedBe sure to conduct this expreiment using constant heatNext, to prevent as much air from re-entering the can when it is cooled, aluminum foil can either cover the can or a plug can be made using crumpled foilremember not to seal the can completely or steam pressure will blow the plug out of the canGood luck and have fun! BTW: Your great grandson would like to remind you what a health risk drinking 20th century American soda pop is, not to mention exposing food to metallic aluminumToo bad you don't use biopolymer packaging genetically engineered to your own tissue type.
