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Lecture 1

# Lecture 1 - Lecture1 17:51 Chem1007 DimensionalAnalysis...

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Lecture 1 17:51 Chem 1007 Dimensional Analysis changing units using the factor label method multiply given value by a factor that equals one [information given] x [conversion factor(s)] = [information sought] In major league baseball, home plate is 60.0 feet and 6.0 inches from the pitcher. If a  professional pitcher throws the baseball 90.0 mph, how long (in seconds) does it take  for the baseball to travel from the pitcher to home plate? (given: 1 mile = 5280 feet) 60 feet 6 inches   =   60.5 feet 1 hour = 90.0 miles 1 mile = 5280 feet 1 hour = 60 min 1 min = 60 sec 60.5 ft (   1 mile   )  (     1 hr      )  (  60 min  )  (  60 sec  )   =   .8458 sec                5280 ft        90.0 mile         1 hr            1 min

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