//Chapter-9,Example 1,Page 219 clc(); close(); a= 1.25 //cross section area in cmsquare l= 10.5 //distance of seperation r=1996 //resistance O_cond= 1/r //observed conductivity C_constant = l/a //cell constant S_cond=C_constant*O_cond //specific conductivity printf('the cell constant is %.2f /cm',C_constant) printf('\n the specific conductivity is %.5f /ohm.cm ',S_cond)