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A patient recovering from surgery is being given fluid intravenously. The fluid has a density of 1050 kg/m3, and 9.99 10-4 m3 of it flows into the patient every four hours. Find the mass flow rate in kg/s.
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In chemical changes, new substances are formed. Do the atoms involved actually change? If not, what has changed? How would you help your students visualize this?
How are chemical and physical changes different. What are some demonstrations that you might do to help your students differentiate between a chemical and physical change?
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