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September 20, 2014

Homework Help: Physics

Posted by Connie on Tuesday, November 6, 2007 at 4:14pm.

The human brain consumes about 21.3 W of power under normal conditions. (More power may be required during exams...) How long can a candy bar (299 Calories) power the normally functioning brain? Note: The nutritional Calorie is equivalent to 1000 calories, or 1 kcal, as defined in physics; 1 kcal = 4186 J.

How fast must you lift a 3.60 kg container of milk if the power output of your arm is to be 21.3 W?

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