a) Plot of size versus velocity gradient comparing a sample of low-mass cores (Goodman et al. 1993) with the Cygnus-X MDC sample using single-dish data. Red symbols represent the Cygnus-X MDCs, while black stars show the sample of Goodman et al. (1993). Black line shows the best-fit relation of Goodman et al. (1993) with G = 10 ^{− 0.3    ±    0.2}R ^{− 0.4    ±    0.2}. b) Plot of β versus size relation shown for the same sample. c) Plot of the specific angular momentum versus size. Black line shows the best-fit line from Goodman et al. (1993) with J/M = 10.