Advertisements
Advertisements
प्रश्न
How does the density of a body and that of a liquid determine whether the body will float or sink into that liquid?
Advertisements
उत्तर
The density of an object determines whether it will float or sink in another substance. An object will float If the density of a body is LESS than the density of LIQUID. An object will sink If the density of a body is MORE than the density of liquid it is placed in.
APPEARS IN
संबंधित प्रश्न
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
Why does it happen?
A ship dips to a larger depth in fresh water as compared to marine water.
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
The pressure inside a liquid of density p at a depth h is :
A block of iron of mass 7.5 kg and of dimensions 12 cm × 8 cm × 10 cm is kept on a table top on its base of side 12 cm × 8 cm.
Calculate:
- Thrust and
- Pressure exerted on the table top
Take 1 kgf = 10 N.
(i) The diameter of neck and bottom of a bottle are 2 cm and 10 cm, respectively. The bottle is completely filled with oil. If the cork in the neck is pressed in with a force of 1.2 kgf, what force is exerted on the bottom of the bottle?
(ii) Name the law/principle you have used to find the force in part (a).
Complete the following sentence :
Two balls, one of iron and the other of aluminium experience the same upthrust when dipped completely in water if _____________ .
A balloon filled with helium gas floats in a big closed jar which is connected to an evacuating pump. What will be your observation, if air from the jar is pumped out? Explain your answer.
Select the correct option.
The unit Nm2 is the unit of
Write about buoyant force.
