Wave Antinode problem

[b]1. Waves traveling along a string have a wavelength of 2.4 m. When the waves reach the fixed end of the string, they are reflected. How far from the end are the first two antinodes?

[b]2. Not sure what to use

[b]3. I have no really a clue on what to do, if some one could explain it to me, that would be really helpful.

http://ift.tt/1hOasDj

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