Answer :
Final answer:
Increasing head pressure in a capillary tube causes greater refrigerant flow, similar to how applying pressure can affect fluid dynamics and gas dissolution in other physical contexts.
Explanation:
An increase in head pressure causes more refrigerant to flow through a capillary tube. This concept is comparable to the physical principle that applying positive pressure to one side of a tube causes fluid to move towards the area of lower pressure. This is evident in various physical systems, such as when fluid re-enters a capillary because capillary hydrostatic pressure is less than blood colloidal osmotic pressure, or when an increase in pressure results in an increase in the rate of dissolution of a gas in a liquid, as is the case with carbon dioxide in soda.
