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State one important difference between a physical change and a chemical change?
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In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)
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Ahot sun warms the surface of a lake on a calm day. what will happen to the cold water at the bottom...
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