Recent content by Jamesey162

  1. J

    Calculating the root mean square speed from pressure and density.

    Okay, I've got it now, thanks for the explanation.
  2. J

    Calculating the root mean square speed from pressure and density.

    It defines it as: <c^2> = \frac{{c_1}^2 + {c_2}^2 + {c_3}^2 + ...{c_N}^2}{N} = \frac{{c_i}^2}{N} I'm not exactly sure what the right-hand most part means with the subscript i.
  3. J

    Calculating the root mean square speed from pressure and density.

    I'm sure, atleast that's how they have quoted it in my textbook:
  4. J

    Calculating the root mean square speed from pressure and density.

    Sorry yes <c^2> should be in m^2s^-2 shouldn't it?
  5. J

    Calculating the root mean square speed from pressure and density.

    Homework Statement A tyre contains gas at a pressure of 150 kPa. If the gas has a density of 2.0 kg m-3, find the root mean square speed of the molecules. Homework Equations These are the equations I believe to be relevant: c_{rms} = \frac{\sqrt{<c^2>}}{N} pV = \frac{1}{3}Nm<c^2> p =...