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Thus, conservation of energy (total, including material or rest energy), and conservation of mass (total, not just rest), each still holds as an (equivalent) law. In the 18th century these had appeared as two seeminglydistinct laws. Conservation of energy in beta decay
Oct 01, 2014· UNICEF is committed to doing all it can to achieve the Sustainable Development Goals (SDGs), in partnership with governments, civil society, business, academia and the United Nations family – and especially children and young people.
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