Physics Practice: Fluids - Pressure in Liquids & Atmospheric Pressure (Mock Test 1 - Basic)
1. The thrust exerted by a liquid per unit area of the surface in contact is called ________.
2. The S.I. unit of pressure is Pascal (Pa), which is equivalent to:
3. Liquid pressure at a point inside a liquid is directly proportional to its ________.
4. The pressure at any point inside a liquid acts in ________ directions.
5. Blaise Pascal's Law states that pressure applied to an enclosed fluid is transmitted ________ to every portion of the fluid.
6. A hydraulic press works on the principle of ________.
7. Atmospheric pressure at sea level is approximately ________.
8. Which instrument is used to measure atmospheric pressure?
9. As we go up into the mountains, the atmospheric pressure ________.
10. Water is not used as a barometric liquid because it would require a tube of height ________.
11. Why is mercury used in barometers? (High density & ________ vapor pressure)
12. The pressure exerted by a liquid column of height $h$, density $\rho$, and gravity $g$ is:
13. In a Torricellian barometer, the space above the mercury column is ________.
14. Why do deep-sea divers wear special suits?
15. A sudden fall in barometric height indicates ________.
16. The altimeter is a modified version of ________ barometer.
17. Pressure in a liquid ________ with the increase in density of the liquid.
18. Dams are made thicker at the bottom because ________.
19. If a hole is made in the side of a vessel, the liquid comes out with a velocity $v = \sqrt{2gh}$. This is known as ________ Law.
20. The unit "Torr" is equal to ________.