ANS:C - 10.30 m

Atmospheric pressure is approximately equal to the water column head of 10.30 meters. The atmospheric pressure at sea level is generally accepted to be around 101.3 kilopascals (kPa) or 1 atmosphere (atm). This pressure can support a column of mercury about 760 millimeters (mm) in height, or a column of water about 10.30 meters in height. Therefore, the atmospheric pressure is approximately equal to the water column head of 10.30 meters.