physics
posted by Jennie .
A woman is sitting in a boat at anchor on a lake. Her boat bobs up and down once every 2.0·s. She notices that when the front of her 3.0·m long boat is at one wave crest, a second crest is at the middle of her boat, and a third is at the end.
What is the frequency of the waves? ____ Hz.
What is their wavelength? _____ m.
What is their speed? _____
Can someone explain how to get these?

You told me the period was 2 s so the frequency is (1/2) Hz
Two complete wavelengths along 3 meter boat
so Lambda = 3/2 = 1.5 meters
speed = distance/time = 1.5/2 = .75 m/s
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