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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 14 - Waves > What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature ? Surface tension of mercury at that temperature (20^o C) is 4.65×10^−1 Nm^−1. The atmospheric pressure is 1.01×10^5 Pa. Also give the excess pressure inside the drop.

What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature ? Surface tension of mercury at that temperature (20^o C) is 4.65×10^−1 Nm^−1. The atmospheric pressure is 1.01×10^5 Pa. Also give the excess pressure inside the drop.

The cylindrical tube of a spray pump has a cross-section of 8.0 cm^2 one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.5 m min^−1 what is the speed of ejection of the liquid through the holes ?