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+//CHAPTER 6 _ PRESSURE AND SOUND MEASUREMENT
+//Caption : Knudsen Gage
+// Example 8 // Page 363
+disp("Td=40")
+disp("Tv=300")
+disp("p=2*10^-6")
+Td=40   //('enter the temperature difference=:')
+Tv=300 //('enter the gas temperature at which the force has to be calculated=:')
+p=2*10^-6   //('enter the pressure(in m of Hg)=:')
+pa=p*13600*9.81;
+k=4*10^-4;    // knudsen constant
+F=(pa*Td)/(k*Tv);
+printf('So the  required force is %1.1f N',F)
+