[Solved] At Sea Level, Under Normal Conditions, What Is The Atmospher
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Download Solution PDFAt sea level, under normal conditions, what is the atmospheric pressure? This question was previously asked in SSC JE ME Previous Paper 12 (Held on:22nd March 2021 Evening) Download PDF Attempt Online View all SSC JE ME Papers >- 101.32 kPa
- 100.043 kPa
- 100.1 kPa
- 104.013 kPa
Answer (Detailed Solution Below)
Option 1 : 101.32 kPa Crack SSC JE Mechanical (CBT 2) Crash Course 2025 with India's Super Teachers FREE Demo Classes Available* Explore Supercoaching For FREE
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Download Solution PDFExplanation:
Atmospheric Pressure:
- The normal air pressure at sea level is 1,013.2 millibars.
- The air at the surface is denser due to gravity, which hence has greater pressure.
- Air pressure is measured using a mercury barometer or aneroid barometer.
- The value of what we call standard sea-level pressure is 760 mm of mercury, 1013.25 x103 dynes per square centimeter, 14.70 pounds per square inch, 1013.25 millibars, or simply one standard atmosphere which is 101.325 kilopascals.
- The air majorly contains 72 percent nitrogen and 21 percent oxygen, in addition to a small amount of carbon dioxide, hydrogen, etc.
- Air has weight and thus, like liquids, it exerts pressure.
- A force is exerted by the atmospheric air on all objects in the atmosphere and on the Earth.
- The force or thrust exerted on a unit area by the atmospheric air is defined as atmospheric pressure.
- 1.013 × 105 Pa is the approximate value of atmospheric pressure on the earth's surface.
- The standard atmospheric pressure is 0.760 mHg at 0 °C.
- This is a pressure equal to 101325 Pa.
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