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Roasting Hotdogs

Sience experiment
by

Hilbillybob Joe

on 13 May 2011

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Transcript of Roasting Hotdogs

Roasting Hotdogs Problem Problem What type of reflective object can reflect enough heat from the sun to roast a hotdog? Aluminum, Tin, or Glass Hypothesis If I test what type of materials insulate enough heat to roast a hotdog Then I expect glass to be the best insulator Because it is very reflective and tinfoil to reflect more light than aluminum Variables Tin, Aluminum, and Glass The dependent variables are: the reflecting lights heat from the sun Independent I will measure my dependent variable by using: Temperature and farenhiet The control variables are: The same type of hotdog, the same type of day, and the same given time. Source 1: http://www.buildingggreen.com/auth/article.cfm/2008/1/1/solar-reflactanceindexandcoolroofs Source 2: http://library.thinkquest.org/10796/mirror.htm.htm?tql-iframe Source 3 https://sites.google.com/site/uvraysallyouneedtoknow/ways-you-can-protect-yourself Source 3 Materials 3 cardboard boxes . tin foil . glass squares or rectangles . 3 skewers . 3 hotdogs . cardboard (about the size of a piece of paper) . . Do I need sunglasses to protect my eyes? Do I need special tongs to hold the hot dog? Yes, because the light is very bright and it could hurt my eyes Maybe, because the hotdog may or may not be hot. Do I need special tongs to hold the hotdog? Maybe, because heat travels through metal so I might get burnt touching the hotdog Procedures 1.Take the cardboard box and cut it into a parabolic curve 2. Attach variable(s) to cardboard box, then tape them down 3. Attach 2 scraps of cardboard, one for each side,to act like supports 4. Make a hole big enough for the skewer to fit through 5. Put the hotdog on the skewer and put the skewer between the 2 holes 6. Place in a place outside with a moderate amount of sunlight Repeat 3 times with different variables Obsevations Observations Glass See: the hotdog is dark tan but not to dark, some parts are brown, but not close to black Smell: smells like burnt hotdog Taste: not sure if it is edible Hear: Hotdogs dont speak Touch: kind of wet, about room temp. Tin See: a darker brown than used with glass, lots of dark brown spots Taste: not sure if it is edible Smell: smells like burnt hotdog Hear: hotdogs dont speak Touch: kind of wet, about room temp Aluminum See: looks like a normal hotdog Taste: not sure if it is edible Smell: smells like a burnt hotdog Hear: hotdogs don't speak Touch: kind of wet Conclusion In my hypothesis, I said glass would insulate the best and Aluminum would be the worst insulator due to its flimsyness and wrinkles. I have done my experiment over a 5 hor testing limit and in those 5 hours I discovered that tin had the highest temp. at 132 degrees and aluminum with the lowest temp. So I conclude that I was partialy correct In my research I learned that metals are good insulators and insulators are things that trap heat rather than let it pass through like a conductor. I learned that the darker the color of an object the more heat it absorbs, light colors like white reflect light, heat, and hiv rays from the sun, and for a surface to be cool or hiv reflecting it needs to be reflective or to have emensity. I learned that curved mirrors will reflect light diffrently, that curved mirror would be concave, mirrors are silver so they reflect things better than most objects. I learned that ultra violet rayshave dangerous effects on skin, you can protect yourself by staying in shade and wear a hat and sun glasses. In my hypothesis, I said glass would insulate the best and aluminum would be the worst insulator due to its flimsyness and wrinkles. I have done my experiment over a 5 hour testing limit and in those 5 hours I discovered that Tin had the highest temp. at 132 degrees and aluminum with the lowest temp. over that period of time. So I conclude I was partialy correct. In my reasearch I learned that metals are good insulators and insulators are things that trap heat rather than leat it pass through like a conductor does. It probably wasn't a hot enough day to the experement. If I were to do this experement in a different spot and see how much heat absorbs than. If I were to do this experement again I would test aluminum again if it can try and get more heat and a higher temp. rating. I would also test tin to see if I can get tin to roast a hotdog. But if I did this experement again I would NOT use glass but my step dad says mirror cutters are expensive and the one at home depot is 249.99$! But with another like rubber or steel wool. Thanks for watching!!!!!!!!!!!!!! By: Shane Cook safety
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