A woman is sitting in a boat at anchor on a lake. Her boat bobs up and

[sunshinedaydream]

down once every 3.0·s. She notices that? A woman is sitting in a boat at anchor on a lake. Her boat bobs up and down once every 3.0·s. She notices that when the front of her 4.0·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? 2___ m.

What is their speed? 3___ m/s.