# Homework Help: Simple sound problems

1. Jan 12, 2009

### shemer77

1. The problem statement, all variables and given/known data
1) a longitudinal wave with a frequency of 3 Hz takes 1.7s to travel the length of a 2.5m slinky. Determine the wavelength of the wave?
2)One tsunami had a wavelength of 750km and traveled a distance of 3700 km in 5.3 hours.
a) what was the speed of the wave. For reference the speed of a 747 jetliner is about 350 m/s.
B) find the frequency
C)find the period
3)A person lying on an air mattress in the ocean rises and falls through 1 complete cycle every five seconds. The crests of the wave causing the motion are 20m apart. Determine
a)frequency
b)speed of the wave
4)the rightmost key on a piano produces a sound wave that has a frequency of 4187.6Hz. assuming that the speed of sound is 343 find the wavelength
5)a jet skier is moving at 8.4 ms in the direction in which the waves on a lake are moving. each time he passes over a crest, he feels a bump. the bumping frequency is 1.2 Hz and the crests are separated by 5.8m. What is the wave speed
6)the speed of a transverse wave on a string is 450 and the wavelength is .18. the amplitude of the wave is 2mm. how much time is required for a particle of the string to move through a total distance of 1 km?

thanks for helping me!

2. Jan 12, 2009

### LowlyPion

What are your thoughts on how to solve the problems?

I don't see what it is you are stuck on or what you have attempted.

3. Jan 12, 2009

### shemer77

for number 1, How can i solve this without the speed?

4. Jan 12, 2009

### LowlyPion

Why don't you have the speed?

2.5 m in 1.7 s looks like the precursor to speed to me.