जब किसी द्रव प्रणाली की कैविटेशन संख्या (cavitation number) घटकर शून्य हो जाती है, तो यह किसे दर्शाता है?

Which of the following dimensionless numbers represents the ratio of inertial force to surface tension force?

Determine PA - PB (in Pascal) for an inverted U-tube differential manometer measuring two pressure points. Specific weight of water = 9810 N/m3, specific gravity of Hg = 13.6, and g = 9.81 m/s2.