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For each homework question and lab report we will make a post, this will probably contain a few tips on what the problems are about and how to solve them. If you are stuck on something then instead of emailing us directly you should post a comment in reply to the relevant post. We will try to guide you through tough points and help you understand the problems and the concepts behind them.
Saturday, September 18, 2010
Chap 17, problems 9 - 11
Problems from SV8 Section 17.6. The language of #10 (Problem 17.36) is a bit ambiguous. Part b should say, "What percentage of the power generated by the power station does this loss represent."
4 comments:
Anonymous
said...
For # 11, part b: I am using this equation: T = T₀ + (R/R₀ - 1)/α. Web assign is telling me that the temperature is within the 10% but I don't know how to get it . Are we supposed to round it off to the nearest 100th?
The equation you wrote is correct, and WebAssign will accept your answer if it is within 1% of the correct value. Your mistake is probably somewhere in your algebra or arithmetic, but if you don't show me what you've done, I can't find the error.
I had the same problem, and I solved it by removing two zeros.
e.g. 0.0000005 => 0.00005
If that solves your problem, great, but it won't help you on a test. I advise you to visit the help room or office hours to figure out what you did wrong. That's what I plan on doing.
4 comments:
For # 11, part b: I am using this equation: T = T₀ + (R/R₀ - 1)/α. Web assign is telling me that the temperature is within the 10% but I don't know how to get it . Are we supposed to round it off to the nearest 100th?
The equation you wrote is correct, and WebAssign will accept your answer if it is within 1% of the correct value. Your mistake is probably somewhere in your algebra or arithmetic, but if you don't show me what you've done, I can't find the error.
@Anonymous from September 20, 2010 6:32 PM
I had the same problem, and I solved it by removing two zeros.
e.g. 0.0000005 => 0.00005
If that solves your problem, great, but it won't help you on a test. I advise you to visit the help room or office hours to figure out what you did wrong. That's what I plan on doing.
Thank you. I was subtracting instead of adding and I definitely plan on visiting the help room.
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