Physics
Ozone layer in the outer atmosphere helps us in

Absorbing UV radiations
Absorbing cosmic ray particles
Reflecting radio waves and makes radio communication possible
Regulating the temperature of atmosphere

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

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