When drops of mercury are placed on a clean surface of glass, they merge and become single drop explain.
The adhesive force between mercury molecules and glass molecules are weak, while cohesive force between molecule - molecule of mercury are strong. Hence, mercury drop does not stick to the surface of glass and gathered to form a large drop.
Water is flowing through a horizontal tube according to the figure. Its diameter at two points are $0.3\,m$ and $0.1\,m$ respectively. Pressure difference between these two points is equal to $0.8\,m$ of water column. Find rate of flow of water in the tube ..... $ltr/s$
Can Bernoulli’s equation be used to describe the flow of water through a rapid in a river? Explain.
A closed vessel have a small hole in one face of vessel near the bottom as shown. The velocity of water coming out from the given hole at given instant is ....... $m/s$
An $ L-$ shaped tube with a small orifice is held in a water stream as shown in fig. The upper end of the tube is $ 10.6 cm$ above the surface of water. ....... $cm$ will be the height of the jet of water coming from the orifice ? Velocity of water stream is $2.45 m/s$
At what speed, the velocity head of water is equal to pressure head of $40 \,cm$ of mercury is ........ $m / s$