Suppose you spend 30.0 minutes on a stair-climbing
Chapter 12, Problem 12.63(choose chapter or problem)
Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 90.0 steps per minute, with each step 8.00 inches high. If you weigh 150 lb and the machine reports that 600 kcal have been burned at the end of the workout, what efciency is the machine using in obtaining this result? If your actual efciency is 0.18, how many kcal did you really burn?
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