While watering a distant plant, a gardener partially closes the exit hole of the pipe by putting his finger on it. Explain why this results in the water stream going to a larger distance.

A water barrel stands on a table of height h . If a small holes is punched in the side of the barrel at its base, it is found that the resultant stream of water strikes the ground at a horizontal distance R from the table. What is the depth of water in the barrel?

Two swimmers start at the same time from point A one bank of a river to reach point B on the other bank, lying directly oppostie to point A. one of them crosses the river along the straight line AB, while the other swims at right angles to the stream and then walks the distance, which he has been carried awayby the stream to get to point B. Both swimmers reach point B at the same time. what was the velocity (assumed uniform) of his walking if velocity of both the swimmers in still water is 2.5 km h^(-1) and the stream velocity is 2 km h^(-1) ?

When a pipe, through which water is flowing out, is partially closed with a finger, the water stream coming out falls to a greater distance from the pipe. Why?

A water barrel stands on a table of height h.If a small hole is punched in the side of the side of the barrel at its base. It is found that the resultant stream of water striks the ground at a horizontal distance R from the barrel. What is the depth of water in the berrel?

Large quantities of sewage is generated everyday in cities and towns, which is treated in Sewage Treatment Plants (STPs) to make it less polluted. Given below is the flow diagram of one of the stages of STP. Observe the given flow diagram and answer the questions accordingly (a) Why primary effluent is passed into large aeration tanks? (b) Write the technical term used for the sediment formed? Mention its significance (c) Explain the final step that results in the formation of biogas in the large tank before the treated effluent is released into water bodies.

Two swimmers leave point A on one bank of the river to reach point B lying right across on the other bank. One of them crosses the river along the straight line AB while the other swims at right angles to the stream and them walks the distance that he has been carried by the stream to get to point B . what was the velocity v_(0) of his walking if both swimmers reach the destination simultaneously? The stream velocity is u and v is the velocity of swimmer in still water.

(i) In the arrangement shown in the figure, the tank has a large cross section and the pipes have much smaller cross section. The opening at A is unplugged and the water jet hits the ground surface at a horizontal distance x. (a) Find the level of water (h) in the tube B as water flows out of A. (b) Find x. (i) A flat horizontal surface has a small hole at its centre . A circular glass plate of radius R is placed symmetrically above the hole with a small gap h remainng between the plate and the surface A liquid enters the gap symmetrically from all sides and after travelling radially through the gap finally exits from the hole. The volume flow rate of the liquid coming out from the hole is Q (in m^(3)s^(-1) ). (a) If the flow speed just inside the circumference of the circular plate is V_(0) and the speed (V_(x)) of flow inside the gap at distance x(see figure) from the centre of the hole. (b) Write V_(x) in terms of Q, h and x.