Physics
A photo-electric cell converts

Heat energy to mechanical energy
Mechanical energy to electric energy
Light energy to chemical energy
Light energy to electrical energy

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

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

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