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+//example 4
+//Calculating atmospheric pressure
+clear
+clc
+dm=13534 //density of mercury in kg/m^3
+H=0.750 //height difference between two columns in metres
+g=9.80665 //acc. due to gravity in m/s^2
+Patm=dm*H*g/1000 //atmospheric pressure in kPa
+printf("\n hence, atmospheric pressure is Patm = %.2f kPa. \n",Patm) \ No newline at end of file