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physics

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While you sleep, your body is using energy at a rate of 77 W. How many food calories are used during an eight hour period? One food calorie is equal to 4186 joules.

  • physics - ,

    No. of Joules used = 77 J/s * 8 hr * 3600 sec/hr
    = 2.2*10^6 J = 529 food Calories

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