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When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?
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An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o
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The average fuel economy for a gasoline powered car is about 45 miles per gallon. The average car in...
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