Advertisements
Advertisements
प्रश्न
The density of aluminium is 2.7 g cm-3 and that of brass 8.4 g cm’3. The correct statement is
पर्याय
Equal masses of aluminium and brass have equal volumes
The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
The volume of a certain mass of brass is more than the volume of equal mass of aluminium.
Equal volumes of aluminium and brass have equal masses.
उत्तर
The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
APPEARS IN
संबंधित प्रश्न
Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
A dam has broader walls at the bottom than at the top. Explain.
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
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.
- Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm-3.
- Will the height of the water column in part (a) change if the cross-section of the water column is made wider?
Two cylindrical vessels fitted with pistons A and B of area of cross-section 8 cm2 and 320 cm2 respectively are joined at their bottom by a tube and they are completely filled with water. When a mass of 4 kg is placed on piston A, Find:
- the pressure on piston A,
- the pressure on piston B, and
- the thrust on piston B.
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.
Is thrust a scalar or vector quantity?
Write about buoyant force.
