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Chemistry, 23.06.2019 12:00, snikergrace
Which of the following statements is true? a. most heat energy is easily recovered and used for useful actions. b. friction causes molecules to vibrate more slowly. burning air and gasoline in an c. engine changes chemical energy into mechanical energy. it is impossible to d. change mechanical energy into mechanical energy.
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Chemistry, 23.06.2019 12:50, ttangelique
What is the relative mass of an electron? a) 1/1840 the mass of a neutron + proton b) 1/1840 the mass of an alpha particle c) 1/1840 the mass of a c-12 atom d) 1/1840 the mass of a hydrogen atom
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Chemistry, 23.06.2019 16:40, xarianna2007
Moseley made revisions to the periodic table that resolved some of the problems with mendeleev's version. which of thesewas a result of his revisions to the periodic table? the revised periodic table could account for the discovery of new elements. the revised periodic table could account for variations resulting from isotopesscientists could begin to write new information onto each element. scientists could begin to place the table on a single sheet of paper.
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Mathematics, 28.04.2021 20:30
Mathematics, 28.04.2021 20:30
Mathematics, 28.04.2021 20:30