18. The following > medium A, B, C and D :
(i) Why is the speed of sound through medium C 0(m/s) ?
(ii) Identify the most probable physical state of A. Give reason for your
answer.
(iii) Which of the four media could be 'air ?
1+(2+1)+1=3
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18. The following > medium A, B, C and D :
(i) Why is the speed of sound through medium C 0(m/s) ?
(ii) Identify the most probable physical state of A. Give reason for your
answer.
(iii) Which of the four media could be 'air ?
1+(2+1)+1=3
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