At sea level, what is the approximate value of atmospheric pressure in Pa, in mmHg and in atm? (where g = 10 N/kg)

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At sea level, the approximate value of atmospheric pressure in those units of measure is as follows:

  • 101.3 kPa which is how it is usually expressed.  In pascals, it is 101325 pascals.  The first of these units (kilopascals) is usually used because pascals are such a small unit that it...

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At sea level, the approximate value of atmospheric pressure in those units of measure is as follows:

  • 101.3 kPa which is how it is usually expressed.  In pascals, it is 101325 pascals.  The first of these units (kilopascals) is usually used because pascals are such a small unit that it is much less cumbersome to express the measurement in kilopascals.
  • In mmHg (milimeters of mercury), the measure is 760
  • In atm (atmospheres) it is 1 atm.

These are a standard set of measures.  The actual measurement will, of course, vary with weather conditions, which is why barometers work.

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