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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?

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