at school, we have this project and we have to use a water bottle and use three materials around it, such as fiberglass, wool, and suchso i have to pick out the three best insulatorsi know fiberglass, wool, bubble gum wrap, and foam are some good onescan YOU choose the top three best heat insulators and name them? and pls explain why as wellif possible, pls list your sources and give a websitethanks10 points for best answer, i swear!!! :D thx again
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metal like aluminum is a poor insulatorHowever, a layer of aluminum foil can prevent heat from escaping via radiation (more on this below)Best insulators are materials like ceramic (as in dishes, also as in the ceramic tiles use on the space shuttle) and materials that have lots of air bubbles inside them, like styrofoam, as is used in coffee cupsBubble wrap is fairly good but only for large objects where you can use lots of itSpun fiberglas is fairly good, as is wool, both because they trap air in themA vacuum, as in a vacuum thermos, is very good, as there is no conduction or convection There are several ways heat can be lost Conduction, the objects have to be touchingMetal conducts heat very wellAvoid this by using only materials with low thermal conductivity, like most plastics, styrofoamConvection, via air circulationAvoid this by keeping the air still and contained, eg, bubble wrapRadiation, a hot object will radiate to a cold object, even through a vacuumA shiny surface like Al foil will reflect much of the backEvaporation (liquids only), water will lose heat as it evaporates into the surrounding airHot water loses a LOT of heatUsing a closed container will negate this.
