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+//Example 10// Ch 4
+clc;
+clear;
+close;
+// given data
+d = 0.001; //in meters
+p = 101.3; //in kPa
+alpha = (17.7 + log(d))/d;//ionization coefficient in m^-1
+x = alpha/p; //in m^-1kPa^-1
+s = 11253.7; //constant in m-1kPa-1
+B = 273840; //constant in V/m kPa
+E1 = p/((-1/B)*log(x/s));// in V/m
+Vs1 = E1*d; //break down voltage in V
+printf("ionization coefficient %f m^-1 \n",alpha)
+printf("electric field %e V/m \n",E1)
+printf("breakdown voltage %f kV \n",Vs1*10^-3)
+E2 = 468*10^4;// in V/m
+Vs2 = E2*d;//breakdown voltage by meel and loeb's eq
+printf("breakdown voltage %f kV \n",Vs2*10^-3)