a. The Bolles and Fair (1982) correlation indicates that \(\mathrm{H}_{\mathrm{G}}\) is more dependent on liquid flux than on gas flux. Explain this on the basis of a simple physical model.

b. Why do \(\mathrm{H}_{\mathrm{G}}\) and \(\mathrm{H}_{\mathrm{L}}\) depend on the packing depth?

c. Does \(\mathrm{H}_{\mathrm{G}}\) increase or decrease as \(\mu_{\mathrm{G}}\) increases? Does \(\mathrm{H}_{\mathrm{G}}\) increase or decrease as \(\mu_{\mathrm{L}}\) increases?