Mechanical Prop...

The meniscus formed by mercury in a test tube is 

Which molecule of a liquid has higher potential energy?

In a container having water filled upto a height h, a hole is made in the bottom. The velocity of the water flowing out of the hole is:

A cylinder of height $$20$$m is completely filled with water. The velocity of efflux of water (in ms$$^{-1}$$) through a small hole on the side wall or the cylinder near its bottom is:

For flow of a fluid to be turbulent:

The area of pistons in a hydraulic machine are $$5  c{m}^{2}$$ and $$625  c{m}^{2}$$. The force on the smaller piston so that a load of $$1250  N$$ on the larger piston can be supported, is X N. Find $$\dfrac{X}{2}$$ N.

Two vessels $$A$$ and $$B$$ of cross-sections as shown in figure contain a liquid up to the same height. As the temperature rises, the liquid pressure at the bottom (neglecting expansion of the vessels) will:

A tank has a small hole at its bottom of area of cross-section a. Liquid is being poured in the tank at the rate $$Vm^3/s$$, the maximum level of liquid in the container will be(Area of tank A):

Two drops of the same radius are falling through air with a steady velocity of $$5\ \text{cm per sec}.$$ If the two drops coalesce, the terminal velocity would be

Figure shows a capillary rise $$h$$. If air is blown through the horizontal tube in the direction as shown then rise in capillary tube will be