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Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.
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Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?
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How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.
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Compare the densities among the three states of matter (which is highest, lowest? )...
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