निम्नलिखित में से कौन सा व्यंजक एक स्थिर, 2D असंपीड्य प्रवाह के लिए गणितीय रूप से संभव धारा फलन (Ψ) को 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.