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Topic: Calculating percent change  (Read 6947 times)

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Offline nozo

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Calculating percent change
« on: February 17, 2007, 02:31:36 AM »
Hi! I'm trying to solve for the percent change in the velocity of air given a change in temperature of 10 degrees. The accepted value of V(air) is 331 at 0oC.   Since V(air) is proportional to sqrt of temp, I calculated the new velocity to be 343. So the percent change is 3.6%. Is this correct?
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Offline enahs

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Re: Calculating percent change
« Reply #1 on: February 17, 2007, 12:53:44 PM »
If the numbers you have us are correct, then that is correct.
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Offline xiankai

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Re: Calculating percent change
« Reply #2 on: February 24, 2007, 05:55:32 AM »
Quote
Since V(air) is proportional to sqrt of temp

V = k T^0.5

where k is the constant of proportionality, and T is in kelvin.

331 = k (273)^0.5

k = 20.033

V(10oC) = 20.033 (283)^0.5

V(10oC) = 337

how did u get your result?
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