What are some bad insulators?
Materials that function as poor thermal or electrical insulators—meaning they readily permit the flow of heat or electrical current—are typically classified as excellent conductors. Prime examples of poor insulators and strong conductors include metals such as copper, aluminum, silver, gold, and iron, which have free-moving electrons that transfer thermal energy and electricity efficiently. Additionally, wet wood, impure water containing dissolved salts, and damp human skin act as poor insulators, significantly increasing electrical shock risks.
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