Waves Homework

1.Measurements show that the wavelength of a sound in a certain medium is 18 cm. The frequency of the wave is 1900 Hz. What is the speed of the wave?

2. A marine weather station detects waves which are 9.28 meters long and 1.65 meters high and travel a distance of 50.0 meters in 21.8 seconds. Determine the speed and the frequency of these waves.

3.The average person can hear sound waves ranging from 20 to 20000 Hz. Determine the wavelength at these limits, using the speed of sound as 340 m/s.

4.A wave is traveling in a rope. The diagram below represents a snapshot of the rope at a particular instant in time.

Determine the number of (or fraction of) wavelengths between the points ...

1. ... C and E on the rope. _____
2. ... C and K on the rope._____
3. ... A and J on the rope._____
4. ... B and F on the rope._____
5. ... D and H on the rope._____
6. ... E and I on the rope._____

5.A wave with a frequency of 12.3 Hz is traveling from left to right across a rope as shown in the diagram at the right Positions A and B in the diagram are separated by a horizontal distance of 42.8 cm. Positions C and D in the diagram are separated by a vertical distance of 12.4 cm. Determine the amplitude, wavelength, period and speed of this wave.

amplitude= _____

wavelength = _____

period = _____

speed = _____

6. Sachi is rock'n to her favorite radio station - 102.3 FM. The station broadcasts radio signals with a frequency of 1.023 x108 Hz. The radio wave signal travel through the air at a speed of 2.997 x108 m/s. Determine the wavelength of these radio waves.

7. A transverse wave is observed to be moving along a lengthy rope. Adjacent crests are positioned 2.4 m apart. Exactly six crests are observed to move past a given point along the medium in 9.1 seconds. Determine the wavelength, frequency and speed of these waves.

wavelength = ____

frequency = _____

speed = _____

8. Anna Litical and Stan Dingwaives are holding an elastic cord between them. Using a 1.6 meter long rope, they create a wave which travels at 2.4 m/s and has a frequency of 1.5 Hz. What would be the new wavelength and speed if they double the frequency of vibration of the cord?

wavelength= _____

speed = _____

9. Winston and Michal hold opposite ends of a stretched rope. Winston introduces a 68-cm tall upward-displaced pulse on his end while Michal simultaneously introduces a 42-cm tall upward-displaced pulse on his end. The two pulses meet in the middle of the rope. a. What is the resultant displacement of the rope when they completely overlap?

b. What would be the resultant displacement of the rope if Michal's pulse was displaced downward?

10. Describe how the fans in a stadium must move in order to produce a longitudinal stadium wave.