Advertisements
Advertisements
प्रश्न
What do you mean by buoyancy?
Advertisements
उत्तर
- The upward force exerted by a liquid on an object immersed in it is known as buoyancy.
- When you try to immerse an object in water, then you can feel an upward force exerted on the object, which increases as you push the object deeper into the water.
APPEARS IN
संबंधित प्रश्न
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
Describe an experiment to determine the density of the material of a coin.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
Complete the following sentence :
Pressure at all points at the same depth is ....................
The pressure of water on the ground floor is 40,000 Pa and on the first floor is 10,000 Pa. Find the height of the first floor. (Take : density of water = 1000 kg m-3, g = 10 m s-2)
What is the cause of upthrust? At which point can it be considered to act?
A piece of wood if left under water comes to the surface. Explain the reason.
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
Calculate the hydrostatic pressure exerted by water at the bottom of a beaker. Take the depth of water as 40 cm, the density of water 1000 kgm−3 and g = 9.8 ms−2.
What do you mean by buoyancy?
