1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Calorie work power

  1. Oct 19, 2007 #1
    1. The problem statement, all variables and given/known data

    (a) If you follow a diet of 2000 food calories per day (2000 kilocalories), what is your average power consumption in watts? (A food or "large" calorie is a unit of energy equal to 4.2 103 J; a regular or "small" calorie is equal to 4.2 J.) Note for comparison that the power consumption in a table lamp is typically about 100 watts.
    _______ watts
    (b) How many days of a diet of 2000 large calories are equivalent to the gravitational energy change from sea level to the top of Mount Everest, 8848 m above sea level? Assume your weight is 68 kg. (The body is not anywhere near 100% efficient in converting chemical energy into change in altitude. Also note that this is in addition to your basal metabolism.)

    2. Relevant equations

    Power = Work / delta T

    3. The attempt at a solution

    i tried to find the power based on the calories being large and for when they are small. then i averaged the two powers. it didnt seem to work out though. =(
  2. jcsd
  3. Oct 19, 2007 #2


    User Avatar
    Homework Helper

    can you show your steps?
  4. Oct 20, 2007 #3
    i ended up figurin out the solution.
    thanks for the help anyways.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook