1. what is the period of a wave with a crest to trough distance of 5m and a freq

Question

1. what is the period of a wave with a crest to trough distance of 5m and a frequency of 20Hz? What is its speed?

2. A standing wave is produced on a wire that is 3cm long. It has 3 nodes and 2 crests. Thw wave has a frequency of 5Hz. What is its peed?

3. A standing wave is produced on a clothesline 8m long when five birds sit on the line. No birds sit on the end. A wave with a 3Hz frequency is created by the wind. What is the wave speed?

4. A wave is reflected from a wall 700m away. The reflected wave is detected 5 sec after the orignal wave's transmission. What is the speed of the wave? If the wave has a period of 0.002 sec, what is its wavelength?

5. A fisheman notices that his boat is moving up and down in a periodic way because of waves on the surface of the water. It takes 4 sec for the boat to travel from its highest point to its lowest point, a total horizontal distance of 3m. How fast are the waves traveling? He times a wave. It takes 150 sec for one wave to go from the boat to the shore. How far away is it?

Please show the formula used

Explanation / Answer

a) Period = 1/f = 1/20 = 0.05 s

speed = 10/0.05 = 200 m/s

b)speed = 2*5 = 10 m/s

c)speed = 3.2*3 = 9.6 m/s

d)

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