Physics Fluid Mechanics Test Online MCQs

1. Find the lifting force of a 4 kg cork life but in sea water if the density of cork and sea water are 0.2 x 10³ kg/m³ and 1.03 x 10³ kg/m³ respectively

2. Soap helps in better cleaning of clothes because:

3. Magnus effect is very near to the

4. A body is just floating in a liquid (their densities are equal). If the body is slightly pressed down and released, it will:

5. More liquid rises in a thin tube because of:

6. If there were smaller gravitational effect which of the following forces do you think will alter in some respect?

7. A drop of oil is placed on the surface of water. Which of the following statement is correct?

8. If you float on your back on water, your weight is:

9. A piece of ice is floating in a jar containing water, when the ice melts, the temperature of water falls from 4°C to 1°C. Then the level of water

10. When a soap bubble is charged:

11. It is easier to spray water to which soap is added, because

12. Three liquids of densities d, 2d and 3d are mixed in equal volumes. Then the density of mixture is

13. Small droplets of liquid are usually more spherical in shape than larger drops of the same liquid because:

14. Three liquids of densities d, 2d and 3d are mixed in equal proportions of weights. The relative density of the mixture is:

15. A parrot is in a wire case, which is hanging from a spring balance. Initially the parrot sits in the cage and in the second instant the parrot flies inside the cage: