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+//Chapter 3, Exmaple 7, page 105
+//Mean square velocity of Helium 
+clc
+clear
+//based on equation 3.2 and 3.3 we derive the gas density
+N = 178*10**-3 // kg/m^3
+// calculating mean square velocity
+v2 = (3*1.01*10**5)/N
+printf("\nV^2 = %e m^2/s^2",v2)
+v = sqrt(v2)
+printf("\nMean square velocity = %f m/s",v)
+
+//Answer may vary due to round off error