Physics
A student is given three liquids A, B and C of densities ρ1, ρ2 and ρ3. He has to arrange these liquids in order of their increasing densities. To do so, he takes an object and dips it in each liquid and observes that the object floats with 1/9, 2/11 and 3/7 parts of its volume outside the surface of liquid A, B and C respectively. The correct order is :
- ρ1 > ρ2 > ρ3
- ρ2 > ρ3 > ρ1
- ρ3 > ρ2 > ρ1
- ρ3 > ρ1 > ρ2
Related Questions
When a fish has to rise up in water, it diffuses oxygen gas from its blood into the bladder, so its volume …………… and its average density …………… .
- decreases, decreases
- increases, decreases
- decreases, increases
- increases, increases
A ball is made of a material of density ρ, where ρoil < ρ < ρwater with ρoil and ρwater represent the densities of oil and water respectively. The oil and water are immiscible. If the above ball is in equilibrium in a mixture of this oil and water, the figure which represents the equilibrium position is :
- 1.
-exc-5c-icse-9-phy-concise-374x246.png)
- 2.
-exc-5c-icse-9-phy-concise-425x317.png)
- 3.
-exc-5c-icse-9-phy-concise-390x260.png)
- 4.
-exc-5c-icse-9-phy-concise-417x284.png)
State the principle of floatation.
When a piece of wood is suspended from the hook of a spring balance, it reads 70 gf. The wood is now lowered into water. What reading do you expect on the scale of spring balance?
[Hint: The piece of wood will float on water and while floating, apparent weight = 0].