Advertisements
Advertisements
Question
A dam has broader walls at the bottom than at the top. Explain.
Advertisements
Solution 1
The pressure exerted by a liquid increases with its depth. Thus as depth increases, more and more pressure is exerted by water on wall of the dam. A thicker wall is required to withstand greater pressure, therefore, the thickness of the wall of dam increases towards the bottom.
Solution 2
RELATED QUESTIONS
A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
A cork piece floats on water surface while an iron nail sinks in it. Explain the reason.
Explain the following statement:
Sleepers are laid below the rails.
Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
The pressure P1 at the top of a dam and P2 at a depth h form the top inside water (density p) are related as :
A simple U tube contains mercury to the same level in both of its arms. If water is poured to a height of 13.6 cm in one arm, how much will be the rise in mercury level in the other arm?
Given : density of mercury = 13.6 x 103 kg m-3 and density of water = 103 kg m-3.
Complete the following sentence :
Two balls, one of iron and the other of aluminium experience the same upthrust when dipped completely in water if _____________ .
Select the correct option:
When a body is wholly or partially immersed in a liquid, it experiences a buoyant force which is equal to:
In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.
What do you understand by the term “Buoyancy”.
