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Because it keeps the food and other store know the frezzer cold

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Q: Why do the walls and doors of fridges and freezers have polystyrene foam?
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Related questions

Why do the walls and doors of refrigerators and freezers contain thick slabs of polystyrene foam?

because it helps keep the things inside cool


How do you get doors on mall tycoon?

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Why are cool boxes lined with expanded polystyrene with air bubbles in it?

Air is a poor conductor of heat. Likewise, the thin walls of the bubbles of polystyrene are poor conductors. Bubbles of air, rigidly fixed in a polystyrene matrix, cannot transfer heat by convection. That leaves reducing radiation as the only unaddressed mechanism for controlling heat loss. Its low cost and ability to be molded makes expanded polystyrene an economical choice for an effective insulator.


What are the uses of polystyrene?

Food and dairy containers, produce baskets, fast food containers, closures and vending cups and lids comprise the biggest commercial market of polystyrene. Polystyrene is also used in the durable goods industry in the manufacturing of domestic appliances, toys, household goods, electronic goods and furniture. Because polystyrene is not susceptible to rough treatment it is favoured for use as packing materials. Polystyrene is used to protect goods that are shipped by stabilising the items inside the containers. Used for mail order due to its lightweight aspects, polystyrene doesn't add much to postage costs. The food industry uses polystyrene for climate control to keep produce fresh during transportation. Polystyrene is a common insulation product for walls, cavities, lofts and floors. Hope I helped :-)


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One can prevent damp walls by applying a sealant to the interior walls and floors of rooms in the space. One can also prevent damp walls by insulating windows and doors against humidity.


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