Standing waves can be produced

A standing wave can be produced by combining

Standing waves are produced in10m long stretched string. If the string vibrates in 5 segments and wave velocity is 20 m//s , then its frequency will be:

In an air column, stationary waves can be produced even if the superposing waves

In an air column, stationary waves can be produced even if the superposing waves

A vertical tube is made to stand in water so that the waterlevel can be adjusted . Sound waves of frequency 320 Hz are sent into the top of the tube.If standing waves are produced at two successive water levels of 20cm and 73cm, what is the speed of sound waves in the air in the tube ?