A) 600 Hz
B) 640 Hz
C) 680 Hz
D) 720 Hz
Correct Answer: C
Solution :
Given \[v=340\,m{{s}^{-1}},\]\[{{u}_{s}}=20\,m{{s}^{-1}}\]and \[{{v}_{0}}=640\,Hz\] From Dopplers law, \[v=\left( \frac{340}{340-20} \right)640\] \[v=680\,Hz\]You need to login to perform this action.
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