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Question:

How to make an insulated box that is designed to retain heat?

I have a science project where I have to make some sort of box that can keep the heat inside of itThere is also going to be some container that has to be put in the box, that will be filled with some warm or hot water and my box/insulated device, has to keep the water as warm as it can beI can only make this out of wood, paper, cardboard, natural fibers,organic granular material, aluminum foil, and fastening materials, such as tape, glue, screws, bolts, nuts, nails, string, etcSome prohibited materials include any type of foam (plastic, medal, expandable glue, etc.), plastic (except for as part of fastening materials listed above), bubble wrap, glass, commercial insulation, etcI really want to get a good grade on this so please help meThank you :-)

Answer:

We always used two nested styrofoam cups in a lab experiment Making a calorimeter from them was a popular high school project Without something like styrofoam, the ideal would be to trap a vacuum, the next ideal would be to trap dry air The aluminum foil could be used to reflect radiant heat, natural fibers could be used to trap air and wood could be used to make the containers, basically a foil lined box inside a larger box with material to trap air between them I'd be tempted to crumple paper to trap the air.

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