Home › ICSE Class 9 › physics › Pressure in Fluids and Atmospheric Pressure › Atmospheric pressure at sea level is about
Atmospheric pressure at sea level is about
A1.013 x 10^3 Pa only at sea level
B1.013 x 10^5 Pa (or 760 mm of mercury)
C1.013 x 10^7 Pa only at sea level
D1.013 x 10^1 Pa only at sea level
Answer & Solution
Correct answer: B. 1.013 x 10^5 Pa (or 760 mm of mercury)
1. The chapter section on atmospheric pressure gives the value.
2. At sea level the column of air gives a pressure of 1.013 x 10^5 Pa.
3. This equals 760 mm Hg.
4. So option A is correct.
_Source: Selina Concise Physics Class 9, Ch 4 Pressure in Fluids and Atmospheric Pressure (Mistral OCR'd PDF), section on atmospheric pressure_
Related questions
Force on a window of area 0.5 m^2 at depth 10 m in water (rho = 1000, g = 10) isA hydraulic press has small piston area 0.01 m^2 and large piston area 0.2 m^2. A force ofTwo liquids X and Y have densities 800 and 1200 kg/m^3. At depth 2 m the pressures are P_XPressure of a column of mercury 76 cm tall at sea level corresponds toA weather forecast uses changes in atmospheric pressure toAn altimeter in an aircraft measuresAtmospheric pressure decreases with altitude becauseTotal pressure at a depth h in a liquid open to the atmosphere is