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# Ch6 HW2 - Ch6 HW2...

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Ch6 HW2 (Homework) BRANDON JARROTT FELDKAMP PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 16 out of 16 Due: Monday, October 20, 2008 09:00 AM EDT Description Thermal energy; power; open and closed systems. Instructions Reading: Sections 6.4-6.7 and previous sections Because Problem 6 is complex, in this assignment you may submit each question part (answer box) separately. You are allowed 3 submissions for a numerical question part or a multiple select question part, but only 2 for a multiple choice question part. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2 06.X.07.01] 1/1 points A certain motor is capable of doing 3000 joules of work in 12 seconds. What is the power output of this motor? Power = 3000/12 250 watts Solution or Explanation Power = = watts 2. [MI2 06.P.48] 2/2 points (a) If you follow a diet of 1810 food calories per day ( 1810 kilocalories), what is your average power consumption in watts? (A food or "large" calorie is a unit of energy equal to 4.2 10 3 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.

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