A combination of wood and iron, just floats in the water at room temperature. Explain what you will observe when the water is heated.
The combination will still float with same position.
The combination will float on the surface of the liquid.
The combination will sink.
None of the above.
What is the density of water?
1000 g cm-3
1 g cm-3
1 kg m-3
none of these
A piece of pure gold ( = 19.3 gcm-3 ) is suspected to be hollow from inside. It weighs 77.2 g in air and 71.2 g in water.The volume of the hollow portion in gold will be
3 cm3
1 cm3
2 cm3
4 cm3
A wooden cylinder floats in water, with 35% of its volume above water. What is the density of wooden cylinder in SI system?
65 kg m-3
650 kg m-3
0.65 kg m-3
6.5 kg m-3
In case of hydrometer for lighter liquids
its gravity bulb is heavier
the densities of lighter liquids are marked below the density of water.
the density of water is marked at the top of stem.
Its buoyancy bulb is larger
A rubber balloon filled with hydrogen gas is left free in air.Then, the balloon
Escapes into space.
ascends upto a certain height in air and floats
ascends upto a certain height and explodes
ascends upto a certain height and then descends back to ground
A body weighs 40 gf in air, 36.4 gf in liquid and 36 gf in water. Calculate relative density of the body.
10
100
1000
1
A body of weight W, experiences an upthrust R in water. What will be the apparent weight of the body and apparent density of the body when W<R?
Apparent weight = R - W; Apparent density = (1 - ) g cm-3
Apparent weight = W - R; Apparent density = (1000 - ) kg m-3
Apparent weight = W - R; Apparent density = (-1) g cm-3
Apparent weight = Zero; Apparent density = Zero
How is the density of a metallic piece affected, if at all, with increase in temperature?
It becomes negligible.
It increases.
It remains unchanged.
It decreases.
Why does ice float on water?
Density of ice and water is same but ice is a solid
Ice does not float on water
Density of ice is higher than that of water
Density of ice is less than that of water
