How is the speed of a wave determined for this question?

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1 Answer
May 12, 2016

Answer:

The distance from peak to trough is #48# #cm=0.48# #m#, so a full wavelength, #lambda#, is twice this much, #0.96# #m#. The frequency is given as #2.4# #Hz#.

For a wave, #v=flambda=2.4xx0.96=2.304~~2.3# #ms^-1#.

Explanation:

The equation #v=flambda# connects the velocity in #ms^-1# with the wavelength, #lambda#, in #m# and the frequency in #Hz#.

#Hz# (hertz) is the unit of frequency, and is equivalent to #s^-1# in SI units.

This means the units are consistent on both sides.