A stream of water flowing horizontally with a speed of $15\mathrm{ }\mathrm{m} {\mathrm{s}}^{-1}$ gushes out of a tube of cross-sectional area ${10}^{-2} {\mathrm{m}}^2$ and hits a vertical wall normally. Assuming that it does not rebound from the wall, the force exerted on the wall by the impact of water is:

What will be the nature of flow of water from a circular tap, when its flow rate increased from $0.18 \mathrm{L} {\left(\min \right)}^{-1}$ to $0.48 \mathrm{L} {\left(\min \right)}^{-1}?$ The radius of the tap and viscosity of water are $0.5 \mathrm{cm}$ and ${10}^{-3} \mathrm{Pa} \mathrm{s}$, respectively. (Density of water : ${10}^3 \mathrm{kg} {\mathrm{m}}^{-3}$)

A cylindrical tank has a hole of $1{ \mathrm{cm}}^2$ in its bottom. If the water is allowed to flow into the tank from a tube above it at the rate of $70{ \mathrm{cm}}^3 {\mathrm{s}}^{-1}$, then the maximum height up to which water can rise in the tank is_________

Figure below shows a liquid being pushed out of the tube by a piston having area of cross section $2.0 {\mathrm{cm}}^2$. The area of cross section at the outlet is $10 {\mathrm{mm}}^2$. If the piston is pushed at a speed of $4 \mathrm{cm} {\mathrm{s}}^{-1}$, the speed of outgoing fluid is _____ $\mathrm{cm} {\mathrm{s}}^{-1}$

Two light balls are suspended as shown in figure. When a stream of air passes through the space between them, the distance between the balls will