seventy years ago, almost all electrical appliances were completly made out of metal. now , most appliances are plastic on the outside. why do you think this is?
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Expert's answer
2018-02-10T06:11:07-0500
Plastic material comparatively to metal is: • Inexpensive; • Light; • Corrosion resistant; • Durable; • Chemically inert; • Of low thermal expansion; • Has good thermal and electrical insulating property; • Recyclable; • Versatile; • Odourless; • Does not decompose; • Not signal blocking (as a metal).
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
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