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	   "source": [
       "# Chapter 17: ULTRASONICS"
	   ]
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		   "source": [
			"## Example 17.1: Thickness_of_vibrating_quartz_at_resonance.sci"
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"// Scilab Code Ex17.1: Thickness of vibrating quartz at resonance : Page-352 (2010)\n",
"f = 3e+006;    // Fundamental vibrational frequency of quartz crystal, MHz\n",
"Y = 7.9e+010;    // Young's modulus of quartz, newton per metre\n",
"rho = 2650;    // Density of quartz, kg per metre cube\n",
"// We have for resonant frequency\n",
"// f = 1/(2*l)*sqrt(Y/rho), solving for l\n",
"l = 1/(2*f)*sqrt(Y/rho);    // Thickness of vibrating quartz at resonance, m\n",
"printf('\nThe thickness of vibrating quartz at resonance = %3.1f mm', l/1e-003);\n",
"\n",
"// Result\n",
"// The thickness of vibrating quartz at resonance = 0.9 mm"
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