Q:  Can you compute the Jeans length for gas with these properties?


         Start with the formula


                       [       15 k T          ]
            R  =  sqrt [  ------------------   ]
                       [  4 pi G rho mu mH     ]


         and plug in the measured value


                T  =  20 K
              rho  =  10^(-15) kg/m^3
               mu  =  2


         The result is a critical size


                R   =  1.2 x 10^(15) m  

                    =  0.4  pc



  Q:  Look in the table for the actual measured sizes of these clumps.
            What is their fate?



          The measured radii for these clumps are typically 
              a bit smaller than the Jeans' length: the clumps
              have radii around 0.15 - 0.20 pc.  

          The fact that the clumps are forming within a long, thin
              filament of gas, rather than a spherical cloud,
              may affect their size.  Or, this may simply be 
              a minor disagreement due to our over-simplifications.