What quantities appear in the first law of thermodynamics?
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What are chlorofluorocarbons and what impact do they have on the atmosphere?

What does the law of conservation of mass state?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up