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March 4, 2015

March 4, 2015

Posted by **D** on Thursday, February 3, 2011 at 11:08pm.

A 203 lb man eats an order of French Fries consuming 250 Cal of food energy. Afterwards he feels guilty and decides to work off the excess calories by walking up seven flights of stairs 3.0 times. (The total height of seven flights of steps is 110 ft) Calculate the energy the man has burned off by doing the exercise. Assume that work is done only when walking up the steps. Note: 1 Cal = 4.184 kJ

- Chem (but i think its physics) -
**D**, Thursday, February 3, 2011 at 11:19pm203lbs= 902.94N

110ft= 33.528m

902.94*33.528*3=90 822J

90822J* 1Calorie/(4184J) = 21.7

- Chem (but i think its physics) -
**MathMate**, Friday, February 4, 2011 at 12:24amI did not check the numbers, but the steps are correct.

- Chem -
**Dr. Hopkins**, Friday, February 4, 2011 at 11:04amSTOP CHEATING ON YOUR HOMEWORK

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