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a. The distance from Earth to the Moon is about 240 000 miles. The Concorde has a relative speed of about 2400 km / h. If the Concorde could fly to the moon. How many hours take it, no count the gravity?

b. Ethanol fills a cylindrical glass tube 15.0inches long. We find that the mass of ethanol needed to fill the tube is 9.4g. Calculate the internal pipe diameter in inches. (The density of ethanol is 0.789 g / ml)

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