 
			 
			MCQOPTIONS
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				| 1. | Which of the following formulas is used for the calculation of ultrasonic attenuation coefficient (α)?# | 
| A. | α = 10 log(A<sub>0</sub>/A)/X | 
| B. | α = 20 log(A<sub>0</sub>/A)*X | 
| C. | α = 10 log(A<sub>0</sub>/A)*X | 
| D. | α = 20 log(A<sub>0</sub>/A)/X | 
| Answer» E. | |