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March 15, 2026, 10:29:05 am
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Author Topic: Differential Equation Problem  (Read 855 times)  Share 

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tcg93

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Differential Equation Problem
« on: October 30, 2010, 01:21:16 pm »
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Why is the answer to this question B and not D?
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TrueTears

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Re: Differential Equation Problem
« Reply #1 on: October 30, 2010, 01:37:37 pm »
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this a kilbaha Q? It's wrong, definitely D.

I went through this with a student not long ago and checked with several other ppl too.
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tcg93

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Re: Differential Equation Problem
« Reply #2 on: October 30, 2010, 04:41:32 pm »
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Quote from: TrueTears on October 30, 2010, 01:37:37 pm
this a kilbaha Q? It's wrong, definitely D.

I went through this with a student not long ago and checked with several other ppl too.

yep its kilbaha 2007. thx. karma +1
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will74

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Re: Differential Equation Problem
« Reply #3 on: October 30, 2010, 07:03:29 pm »
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hey guys i totally get reasoning for why its a-x/2 not a-2 ....but why is it negative k out the front ?
isn't dx/dt positive, as X is being produced?
there must be something i'm missing?
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TrueTears

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Re: Differential Equation Problem
« Reply #4 on: October 30, 2010, 07:04:38 pm »
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it's coz the 'velocity' of the reaction is slowing down as the unused amounts of A and B are decreasing :)
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will74

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Re: Differential Equation Problem
« Reply #5 on: October 30, 2010, 07:10:06 pm »
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ohhh ok thanks :)
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