Advertisements
Advertisements
प्रश्न
A dam has broader walls at the bottom than at the top. Explain.
Advertisements
उत्तर १
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.
उत्तर २
संबंधित प्रश्न
If a fresh egg is put into a beaker filled with water, it sinks. On dissolving a lot of salt in the water, the egg begins to rise and then floats. Why ?
What is the law of floatation?
Why does a piece of ice float on water?
State three factors on which the pressure at a point in a liquid depends.
The area of base of a cylindrical vessel is 300 cm2. Water (density= 1000 kg m-3) is poured into it up to a depth of 6 cm. Calculate : (a) the pressure and (b) the thrust of water on the base. (g = 10m s-2.
What is the cause of upthrust? At which point can it be considered to act?
Define atmospheric pressure diving suits. Does a diving suit create buoyancy?
Write about buoyant force.
The center of gravity of the floating body and the center of buoyance are in the same ______ line.
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : _____.
