waves

Related Questions

• A cylindrical tube, open at both ends, has a fundamental frequency ${{f}_{0}}$ in air. The tube is dipped vertically into water such that half of its length is inside water. The fundamental frequency of the air column now is

  ---

• A man standing on a cliff claps his hand hears its echo after 1 sec. If sound is reflected from another mountain and velocity of sound in air is 340 m/sec. Then the distance between the man and reflection point is

  ---

• Suppose that the speed of sound in air at a given temperature is 400 m/sec. An engine blows a whistle at 1200 Hz frequency. It is approaching an observer at the speed of 100 m/sec. What is the apparent frequency as heard by the observer

  ---

• What is the base frequency if a pipe gives notes of frequencies 425, 255 and 595 and decide whether it is closed at one end or open at both ends

  ---

• Two adjacent piano keys are struck simultaneously. The notes emitted by them have frequencies ${{n}_{1}}$ and ${{n}_{2}}$. The number of beats heard per second is

  ---