physics

posted by .

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?

• physics -

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

Respond to this Question

 First Name School Subject Your Answer

Similar Questions

1. Physics Stuff

Ocean waves are traveling to the east at 4 m/s with a distance of 20m between crests. With what frequency do the waves hit the front of a boat (a) when the boat is at anchor and (b) when the boat is moving westward at 1 m/s?
2. math

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 …
3. math

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 …
4. Physics

Periodic waves spread out over the surface of a lake where two women, Jenny and Melissa, are fishing in separate boats 102 meters apart. Each woman's boat bobs up and down 19/min. At a time when Jenny's boat is at a crest, Melissa's …
5. math

A boat drops an anchor to the bottom of a lake. The anchor rope makes a 15 degree angle with the boat. The anchor rope is 24 feet long. How deep is the lake to the nearest foot?
6. HELP!!!! MATH

A boat drops an anchor to the bottom of a lake. The anchor rope makes a 15 degree angle with the boat. The anchor rope is 24 feet long. How deep is the lake to the nearest foot?
7. Trigonometry help

A boat drops an anchor to the bottom of a lake. The anchor rope makes a 15 degree angle with the boat. The anchor rope is 24 feet long. To the nearest foot how deep is the lake?
8. Physics

Periodic waves spread out over the surface of a lake where two women, Jenna and Mel, are fishing in separate boats 97 meters apart. Each woman's boat bobs up and down 31/min. At a time when Jenna's boat is at a crest, Mel's boat is …
9. physics

Periodic waves spread out over the surface of a lake where two women, Jenny and Melissa, are fishing in separate boats 65 meters apart. Each woman's boat bobs up and down 19/min. At a time when Jenny's boat is at a crest, Melissa's …
10. Physics 11

2 men are fishing from small boats located 36m apart. Waves pass through the water, & each man's boat bobs up & down 15 times in 75s. At a time when 1 boat is on a crest, the other 1 is in a trough, & there is 1 crest between the 2 …

More Similar Questions