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+// Chapter 1 Example 3
+//==============================================================================
+clc;
+clear;
+
+//input data
+
+f       = 1.5*10^6;         //frequency of ultrasonics in Hz
+d6      = 2.75*10^-3;       // distance between 6 consecutive nodes
+
+//Calculations
+d       = d6/5;             // distance b/w two nodes
+lamda   = 2*d;              // wavelength in m
+v       = f*lamda;          // velocity of ultrasonics
+
+//Output
+mprintf('Velocity of ultrasonics  = %3.0f m/sec',v);
+
+//==============================================================================