Water is slowly coming out from a vertical pipe.As the water descends after coming out,its area of cross-section redudes.Why?

Why water does not come out of a dropper unless its rubber head is pressed hard?

Water comes out of a cell when it is placed in:

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : The resistance of a wire varies inversely as its area of cross-section. Reason : The resistance of a wire varies inversely as its radius.

A hollow sphere is filled with water through a small hole in it. It is hung by long thread and as water slowly flows out from the hole at the bottom, one finds that the periods of oscillation first increases and then decreases. Explain. Why.

A stream of water flowing horizontally with a speed of 15m s^-1 gushes out of a tube of cross-sectional area 10^-2 m^2 , and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water, assuming it does not rebound ?

Water flows out through a circular pipe whose internal diameter is 2 cm, at the rate of 6 metres per second into a cylindrical tank. The water is collected in a cylindrical vessel, radius of whose base is 60 cm. find the rise in the level of water in 30 minutes?

Coffee is coming out from a conical filter, with height and diameter both are 15 cm into a cylindrical coffee pot with a diameter 15 cm. The rate at which coffee comes out from the filter into the pot is 100 cu cm/min. The rate (in cm/min) at which the level in the pot is rising at the instance when the coffe in the pot is 10 cm, is

What is first milk which comes out from mother's mammary gland called? State its importance.

Water flows out through a circular pipe, whose internal diameter is 2 cm, at the rate of 0.7 m per second into a cylindrical tank, the radius of whose base is 40 cm. By how much will the level of water rise in half an hour ?