31. Power consumption and supply requirements of the solenoid vary with application, being primarily determined by fluid pressure and line diameter. 32. Fluid pressure causes the pad to tilt slightly, creating a narrow constriction between the shoe and the other bearing surface.33. It is a leading cause of blindness in dogs, and is where there is increased fluid pressure within the eye. 34. A constant, sustained leak could cause low fluid pressure , which can lead to chronic headaches; it would probably require surgical correction. 35. Healy and his colleagues found that variations in seismicity correlated with the amount of fluid pressure in the seismically active zone. 36. The volume of the sponge will also increase if its exterior openings are sealed and the pore fluid pressure is increased. 37. It has been used on patients for 30 years to monitor the heart for everything from fluid pressure to oxygen content. 38. The term " single acting " is used when the fluid pressure is applied to just one side of the piston. 39. The straight bands were produced by puddles of quartz-rich solutions that crystallized inside the gas pocket under very low fluid pressure . 40. The principle of this process is only useful for low-viscosity fluids and this principle is not applicable with higher fluid pressures .