A U tube with both ends open to the atmosphere,is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is
(a)
(b)
(c)
(d)
Equal masses of water and a liquid of relative density 2 are mixed together, then the mixture has a density of
(1) 2/3
(2) 4/3
(3) 3/2
(4) 3
If two liquids of same masses but densities and respectively are mixed, then density of mixture is given by
(1)
(2)
(3)
(4)
The density of water of bulk modulus B at a depth y in the ocean is related to the density at surface by the relation
(1)
(2)
(3)
(4)
With rise in temperature, density of a given body changes according to one of the following relations
(a) (b)
(c) (d)
In making an alloy, a substance of specific gravity and mass is mixed with another substance of specific gravity and mass ; then the specific gravity of the alloy is
1.
2.
3.
4.
A silver ingot weighing 2.1 kg is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of silver is 10.5. The tension in the string in kg-wt is
(1) 1.6
(2) 1.94
(3) 3.1
(4) 5.25
In a capillary tube, the water rises by 1.2 mm. The height of water that will rise in another capillary tube having half the radius of the first, is
(1) 1.2 mm
(2) 2.4 mm
(3) 0.6 mm
(4) 0.4 mm
Kerosene oil rises up the wick in a lantern
(1) Due to surface tension of the oil
(2) The wick attracts the kerosene oil
(3) Of the diffusion of the oil through the wick
(4) None of the above
Water rises against gravity in a capillary tube when its one end is dipped into water because
(1) Pressure below the meniscus is less than atmospheric pressure
(2) Pressure below the meniscus is more than atmospheric pressure
(3) Capillary attracts water
(4) Of viscosity