Answer :
Final answer:
The correct representation of normal atmospheric pressure corresponds to option B: 101.3 kilopascals and 76 cm of mercury. These values are driven by the hydrostatic pressure equation, taking into account the density of mercury and gravity. Therefore, standard atmospheric pressure can also be expressed as 760mm of mercury or 101.3 kPa.
Explanation:
The correct values for normal atmospheric pressure are represented by option B: 101.3 kilopascals and 76 cm of mercury. Normal atmospheric pressure is defined as the pressure exerted by the air at sea level. These values correspond to the pressure that can support a column of mercury 76 cm high, or a force of 101.3 kilopascal (kPa).
The calculation supporting this comes from the hydrostatic pressure equation p = hρg, where h = 760 mm, ρ (density of mercury) = 13.6 g/cm³, and g (acceleration due to gravity) = 9.81 m/s². Converting the units appropriately, these values yield an atmospheric pressure of ~101,325 Pa or 101.325 kPa.
So, the values of atmospheric pressure can be given in different units - it could be mentioned in mm of mercury (760 mm Hg), or kilopascals (101.3 kPa). In the context of the question, we can say that 76 cm of mercury is equivalent to 760 mm of mercury, hence option B correctly represents the values of normal atmospheric pressure.
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