Problem D19:
An ideal gas starts out in the state A as shown
in the figure below. State A has a volume of V_{0}
and a pressure of P_{0}. The RMS speed of the molecules in
the state A is v_{rms} = v_{0}. The gas now
undergoes a quasi-static process to the state B, which is
first an isobaric and then an isometric process. The
volume of state B is V = n_{1}V_{0}, and the
pressure of state B is P = n_{2}P_{0}.
If the RMS speed of the molecules in state B is
v_{rms} = n_{3} v_{0},
what is n_{3}? Note that n_{1}, n_{2}
and n_{3} are unitless.

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