Advertisements
Advertisements
प्रश्न
Explain the meaning of the statement
‘Relative density of aluminium is 2.7’.
उत्तर
The statement ‘Relative density of aluminium is 2.7’ means a piece of aluminium of any volume has mass 2.7 times that of an equal volume of water. i.e. Aluminium is 2.7 times heavier than water.
APPEARS IN
संबंधित प्रश्न
Why does a block of wood held under water rise to the surface when released ?
What is the cause of buoyant force ?
How does the pressure exerted by thrust depend on the area of surface on which it acts? Explain with a suitable example.
A tall vertical cylinder filled with water is kept on a horizontal table top. Two small holes A and B are made on the wall of the cylinder, A near the middle and B just Below the free surface of water. State and explain your observation.
How does the liquid pressure on a diver change if :
The diver moves horizontally?
What is meant by the term buoyancy?
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 metal solid cylinder tied to a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into the water contained in a jar. What changes do you expect in the readings of the spring balance? Explain your answer.
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.
Salt water provides less buoyant force than freshwater.
