The rain drops are in spherical shape due to

Horizontal tube of non-uniform cross-section has radius of  $0.2\,m$ and  $0.1\,m$  respectively at $P$  and  $Q$ . For streamline flow of liquid, the rate of liquid flow

A homogeneous solid cylinder of length $L (L < H/2)$ , cross-sectional area $A$ is immersed such that it floats with its axis vertical at the liquid-liquid interface with length $L/4$ in the denser liquid as shown in the figure. The lower density liquid is open to atmosphere having pressure $P_0$ . Then, density $D$ of solid is given by

A boat carrying a number of large stones is floating in a water tank. What would happen to the water level if a few stones are unloaded into water

A wooden block, with a coin placed on its top, floats in water as shown in fig. the distance $l$ and $h$ are shown there. After some time the coin falls into the water. Then

Work of $3.0\times10^{-4}$ joule is required to be done in increasing the size of a soap film from $10\, cm\times6\, cm$ to $10\, cm\times11\, cm$. The surface tension of the film is