- Atmospheric Pressure:
consider a column of air 1 inch the weight (=mass X gravity) of the column of air will be about 14.7 lbs. Hence, the pressure at sea level is =
force/area = 14.7 lbs/inch Sea-level pressure is also given in other units: - 14.7 lbs/inch
^{2} - 1013.25 millibars
- 1013.25 hPa (hecto Pascals)
- 29.92 inches of Hg
Questions for thought: How heavy would I have to be to exert sea-level atmospheric pressure by standing on you on one foot????? Which exerts more pressure, a 4000 lb elephant standing on one leg with a foot size of 8" x 8" or a 120 lb woman standing on one leg in high-healed shoes with a heal size of 1"x1"? |