Problem: If an athlete expends 1950 kJ/h, how long does it take her to work off 1.0 lb of body fat? (1.0 lb needs 4.1x103 Cal of work) 

FREE Expert Solution
  • We need to setup a dimensional analysis that will convert the 1.0 lb of fat to kJ 
  • Cal (with capital C) is related to cal where 1 Cal = 1 kcal
  • Recall also that 4.184 cal = 1 J
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Problem Details

If an athlete expends 1950 kJ/h, how long does it take her to work off 1.0 lb of body fat? (1.0 lb needs 4.1x103 Cal of work) 

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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.