waves

Related Questions

• Two wires are producing fundamental notes of the same frequency. Change in which of the following factors of one wire will not produce beats between them

  ---

• It is desired to increase the fundamental resonance frequency in a tube which is closed at one end. This can be achieved by

  ---

• A string is rigidly tied at two ends and its equation of vibration is given by $y=\cos 2\pi \,t\sin \sin \pi x.$ Then minimum length of string is

  ---

• Sound travels in rocks in the form of

  ---

• A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is

  ---