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Unformatted text preview: t ) × V ( t ) . We are only interested in the average power since this is what the energy company uses to decide how much to charge you. Find the average power used by your oven. (Note that P ( t ) is periodic and you only need to compute an average over its one period.) It is useful to note the trigonometric identity, cos 2 ( x ) = 1 2 ( 1 + cos(2 x ) ) . f) Recall that the total energy used can be computed as (the average power) times (the total time) and that the energy is often measured in kilowatt-hours. If your oven takes 4 hours to cook a turkey and the energy company charges 20 cents/kilowatt-hour, how much does it cost to cook the meal? If you want to learn more about problems of this kind, consider taking the following engi-neering courses: ECE 2100 Introduction to Circuits for Electrical and Computer Engineers (also ENGRD 2100)....
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This note was uploaded on 02/25/2009 for the course MATH 1910 taught by Professor Berman during the Fall '07 term at Cornell.
- Fall '07