Physics
Mica is used in electrical appliances such as electric iron because mica is

a bad conductor of heat as well as electricity
a good conductor of heat as well as electricity
a good conductor of heat but a bad conductor of electricity
a bad conductor of heat but a good conductor of electricity

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Physics
The mass defect is the result of what action occurring?

Energy being converted into moles of atoms when neutrons break apart protons
Mass being converted to energy when protons and neutrons break apart in a nucleus
Protons and electrons being attracted to each other
Mass being converted to energy when protons and neutrons bind together in a nucleus

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