- #1
spaghed87
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Homework Statement
4.60×1023 nitrogen molecules collide with a 20.0cm^2 wall each second. Assume that the molecules all travel with a speed of 450m/s and strike the wall head on.
What is the pressure on the wall in pascals (Pa)?
Homework Equations
p=(1/3)*(N/V)*(m*v_rms^2)
where,
N is the number of molecules: 4.60*10^23
V is the volume: 0.002m^2
m is the mass (diatomic): (14u*2*1.66*10^-27kg/u)
v is the rms speed 450m/s?
The Attempt at a Solution
p=(1/3)*(4.60*10^23/0.002)*(450^2)*(14*2*1.66*10^-27)=722*10^3Pa
Am I wrong on the v_rms? The v_rms is almost always within 10% of the v_avg.