A wave on a lake has wavelength $4$ m and frequency $0.5$ Hz. Its speed is:
A$4.5$ m/s, the simple sum of two quantities here
B$2$ m/s, since $v = f\lambda = 0.5\cdot 4 = 2$
C$8$ m/s, dividing wavelength by frequency
D$0.125$ m/s, the inverse ratio of values
Answer & Solution
Correct answer: B. $2$ m/s, since $v = f\lambda = 0.5\cdot 4 = 2$
$v = f\lambda = 0.5\cdot 4 = 2$ m/s.
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