Advertisements
Advertisements
Question
The atmospheric pressure at a place is 650 mm of Hg. Calculate this pressure in Pascals (Pa).
Solution
Height of mercury column = h = 650 mm
h = 65 cm = 0.65 m
Density of mercury = ρ= 13600 kg/m3
Acceleration due to gravity = g = 10 ms−2
Pressure (P) = 650 mm of Hg = hρg
= 0.65 × 13600 × 10
= 88400 Pa
APPEARS IN
RELATED QUESTIONS
A piece of wood is floating in water kept in a bottle. The bottle is connected to an air pump. Neglect the compressibility of water. When more air is pushed into the bottle from the pump, the piece of wood will float with
66640 Pa pressure is exerted by 0.50 m vertical column of a liquid. If g = 9.8 Nkg−1, calculate the density of the liquid.
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.
One Pascal is equal to
Select the correct option.
Pressure applied in liquids is transmitted with undiminished force
At a given place, a barometer records 70 cm of Hg. If the mercury in the barometer is replaced by water, what would be resulting in reading? (Density of Hg = 13600 kg/m3; Density of water = 1000 kg/m3)
P is the pressure at some point in a liquid. State whether pressure P is a scalar or vector quantity.
Match the following:
| 1. | Hydraulic press | a. | Archimedes |
| 2. | Cartesian Diver | b. | Floatation |
| 3. | Hydrostatic Balance | c. | Pascal’s law |
| 4. | Hydrometer | d. | Buoyancy |
