What length of tube closed at one end will produce the

Question

Step by step would be really helpful!

1. Sound with a speed of 345 m/s is sent down a 2.0 m long tube which is open at a both ends. a) What frequency of sound will produce the 4^th harmonic? b) How many nodes will there be and where will they be in the tube?

2. The amplitude of the motion of a 200 gram mass on a spring is observed to halve in 2.00 minutes. Find the damping coefficient, b or the damping parameter B. At what time will the amplitude be the original amplitude?

3. Sound with a speed of 345 m/s is sent down a 2.0 m long tube which is open at a both ends. a) What frequency of sound will produce the 4^th harmonic? b) How many nodes will there be and where will they be in the tube?

4. What length of tube closed at one end will produce the 5^th harmonic with a frequency of 430 Hz? Assume the speed of sound is 345 m/s. What are the positions of the nodes and the antinodes?