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Mathematics 18 Online
OpenStudy (anonymous):

i will give a medal What defining feature makes a material an insulator?

OpenStudy (calculusxy):

"A material or an object that does not easily allow heat, electricity, light, or sound to pass through it. Air, cloth and rubber are good electrical insulators; feathers and wool make good thermal insulators." -- dictionary.com

OpenStudy (anonymous):

thx

OpenStudy (calculusxy):

You're welcome :)

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