- #1
Faiq
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Homework Statement
Why is the formula ##p = \frac{1}{3}\rho<c^2>## used to calculate the mean square speed at 273K?
Why 273K?
The confusion I had was why is that formula only applicable for the 273K. That's to say why I can't just put that value down for 546K? Later I realized, the pressure inserted in those equations are the indicator of what temperature should the RMS value be for.You are given pressure and density at 273 K and asked to calculate rms at exactly this temperature, I don't see where is the problem?
Missing:Homework Statement
Any word or sentence missing from this full problem statement ? If no, then a list of all variables is good to have at hand. For you too.The density of a gas at a temperature of ##273~K## and a pressure of ##1.02*10^5~ Pa## is ##0.9kgm^{-3}##. It may be asssumed to be an ideal gas.
Calculate rms speed at 273K and 546K.
What given equation ?For 273, we were supposed to use the given equation and for second we were supposed to used the ratio of mean square speed and temperature.
come from ? From the textbook or from the problem statement ? (or perhaps from the solution manualformula ##p = \frac{1}{3}\rho<c^2>##