Thermal Condutivity
The objective of experiment #6 is to examine the thermal conductivity of lexan and glass. Ice was used to check for the insulation capacity. Thermal conduction is a term used to represent a form of heat transport due to interactions between ions, atoms, and molecules in a substance but at the same time the ions, atoms, and molecules are not being transferred. Metals are a good example of thermal conductivity because they have free electrons floating around. Heat is the change of kinetic energy which is transferred from one point to another because of the difference in temperature of these points. The unit for heat is joule (J). The formula to calculate the amount of heat conducted through material is: where Q is the heat conducted; A is the area where conduction takes place; T2- T1 is the difference of temperature between the top and bottom parts of the material; t is the total time that takes the conduction to take place; k is the thickness of the material; k is the coefficient of thermal conductivity of the specific material. The unit of k is Watt per meter-Kelvin (W/mK). The thermal conductivity of a material is important to civil engineers especially because when they build
Also three cups are used during this experiment. The "Condensed Steam" cup is used to collected water due to condensation of steam coming out of the drain spout of the steam chamber. The "Measuring" cup is used to collect melting ice. The unlabeled container is used to collect melted ice at the times when the experiment has not yet started or the Measuring cup is being weighted. The objective of this part was to find the amount of ice melted due to thermal conduction through the walls of the ice mold. The ice melted for two reasons. One was the thermal conduction through the walls of the mold, which was measured in this part. The second was the thermal conduction through the material sample at the bottom of the ice. The latter reason can be eliminated by insulating the bottom of the ice and not heat the sample with steam. In order to insulate the bottom of the ice, a piece of Masonite was used, because this material has a very small thermal conductivity (0.047 W/mK.) After 10 minutes, when the slab of lexan was cooled off, it was removed from the steam chamber and replaced with a slab of glass. Then the same entire process was repeated. After measuring the amount of ice melted due to thermal conduction through the walls of the ice mold in Part A, then the thermal conduction of Lexan and Glass were to be measured. Then the tank of the steam generator was filled approximately ¾ full with water. The Condensed Steam cup was placed under the drain spout of the steam chamber to collect the water (the condensed steam). The steam generator was turned ON and the power dial was set to 8. After a few minutes the water started to boil. The temperature in the chamber was dete
Some common words found in the essay are:
Condensed Steam, T2- T1, Measuring Cup, , Lexan Glass, Cup Start, measuring cup, steam generator, steam chamber, thermal conduction, unlabeled cup, thermal conductivity, melted ice, cup replaced, bottom ice, ice mold, thermal conduction walls, collect melted ice, condensed steam cup, amount ice melted, ice melted due,
Approximate Word count = 1148
Approximate Pages = 5 (250 words per page double spaced)
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