Physics Practice: Fluids - Archimedes' Principle & Floatation (Mock Test 2 - Intermediate)
1. The upward force exerted by a fluid on an object immersed in it is called ________.
2. Archimedes' Principle states that the upthrust on a body is equal to the ________.
3. Relative Density (R.D.) of a substance is the ratio of its density to the density of ________ at 4°C.
4. An object will sink in a liquid if its density is ________ the density of the liquid.
5. The S.I. unit of Relative Density is ________.
6. A body of weight $W$ and upthrust $F_B$ floats when ________.
7. A lactometer is used to check the purity of ________.
8. The density of water at 4°C is ________.
9. When a body is weighed in water, its weight ________.
10. Ships are made of iron but still float because they are hollowed to displace ________ weight of water.
11. A hydrometer works on the Principle of ________.
12. Upthrust depends on the ________ of the immersed part of the body.
13. The R.D. of Silver is 10.8. Its density in S.I. unit is ________.
14. An iron nail sinks in water but floats on mercury because iron is ________ than mercury.
15. Ice floats on water with ________ of its volume inside the water.
16. The center through which the upthrust acts is called center of ________.
17. Which of the following increases the upthrust on a body immersed in a liquid?
18. The Plimsoll line on a ship indicates the ________ level.
19. Density of a substance = R.D. $\times$ ________.
20. A submarine dives by filling its ________ with water.