Advertisements
Advertisements
Question
Define one pascal (Pa), the S.I. unit of pressure.
Advertisements
Solution
One pascal (Pa) is the SI unit of pressure, defined as the pressure exerted by a force of one newton (N) acting uniformly over an area of one square meter (m2). This relationship is expressed as 1 Pa = 1 N/m2.
RELATED QUESTIONS
State Pascal's law of transmission of pressure.
Explain the principle of a hydraulic machine. Name two devices which work on this principle.
The area of cross-sections of the pump plunger and press plunger of a hydraulic press is 0.02 m2 and 8 m2 respectively. If the hydraulic press overcomes a load of 800 kgf, calculate the force acting on the pump plunger.
Select the correct option.
Pressure at a point inside a liquid does not depend on
Define the SI unit of pressure.
The following figure shows a manometer containing a liquid of density p. The limb P of the manometer is connected to a vessel V and the limb Q is open to atmosphere. The difference in the levels of liquid in the two limbs of the manometer is h as shown in the diagram. The atmospheric pressure is P0.
(i) What is the pressure on the liquid surface in the limb Q?
(ii) What is the pressure on the liquid surface in the limb P?
What is the principle of a hydraulic machine?
Match the following:
| 1. | Hydraulic press | a. | Archimedes |
| 2. | Cartesian Diver | b. | Floatation |
| 3. | Hydrostatic Balance | c. | Pascal’s law |
| 4. | Hydrometer | d. | Buoyancy |
