i) 0.30 cm
ii) 0.45 – 0.05 = 0.4 Sec
iii) F = $\frac{1}{T}$ = $\frac{1}{0.4}$ = 2.5 Hz
vi) wavelength = $\frac{V}{f}$
$\frac{200}{2.5}$ = 80 cm
johnmulu answered the question on April 19, 2017 at 12:46
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