Physics Practice: Fluids (Mock Test 5 - Ultimate Mastery)
1. The pressure exerted by a liquid at a given depth is ________ in all directions.
2. A piece of iron sinks in water but a large ship made of iron floats. This is because the ship is ________.
3. $1\text{ Pascal}$ is equal to ________.
4. The buoyant force on a body depends on the ________ of the liquid.
5. Pascal’s law is applicable for ________.
6. If a body of R.D. $0.5$ is placed in a liquid of R.D. $1.5$, the body will ________.
7. The upthrust acts vertically ________ through the center of buoyancy.
8. Relative density of mercury is $13.6$. Its density in S.I. units is ________.
9. As the altitude increases, the barometric height ________.
10. An object will float in a liquid if the upthrust on it is ________ its weight.
11. The pressure exerted by a liquid at its bottom is ________ of the area of its base.
12. A hydrometer is an instrument used to measure the ________ of liquids.
13. The apparent loss of weight of a body in a liquid is ________.
14. Atmospheric pressure is measured using a ________.
15. Why does a sharp knife cut objects more easily than a blunt one?
16. The density of water is maximum at ________.
17. In a hydraulic machine, if the ratio of the areas of the two pistons is $1:10$, then a force of $5\text{ N}$ on the smaller piston produces a force of ________ on the larger piston.
18. Thrust is a ________ quantity.
19. A submarine can sink or float by changing its ________.
20. The unit of pressure 'bar' is equal to ________.
