The human brain consumes about 22 W of power under normal conditions, though more power may be consumed during exams. (a) For what amount of time can one Snickers bar ([Note: The nutritional. calorie, 1 Cal, is equivalent to 1000 calories (1000 cal) as defined. in physics. In addition, the conversion factor between calories and joules is as follows: 1 Cal = 1000 cal = 1 kcal = 4184 J.]) power the normally functioning brain? (b) At what rate must you lift a 3.6 kg. container of milk ( one gallon) if the power output of your arm is to be 22 W? (c) How much time does it take to lift the milk container through a distance of 1.0 m at this rate?

The human brain consumes about 22 W of power under normal conditions, though more power may be consumed during exams. (a) For what amount of time can one Snickers bar ([Note: The nutritional. calorie, 1 Cal, is equivalent to 1000 calories (1000 cal) as defined. in physics. In addition, the conversion factor between calories and joules is as follows: 1 Cal = 1000 cal = 1 kcal = 4184 J.]) power the normally functioning brain? (b) At what rate must you lift a 3.6 kg. container of milk ( one gallon) if the power output of your arm is to be 22 W? (c) How much time does it take to lift the milk container through a distance of 1.0 m at this rate?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter11: Energy And Its Conservation

Section: Chapter Questions

Problem 82A

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