Advertisements
Advertisements
प्रश्न
Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
Advertisements
उत्तर
If we strike a table lightly, by applying less energy, the table top vibrates with small amplitude and hence a soft sound is produced. However, if we hit the table hard, by applying greater energy, the table top vibrates with larger amplitude and hence a loud sound is produced, because the amplitude of sound depends on the force with which an object is made to vibrate and finally results in greater loudness.
APPEARS IN
संबंधित प्रश्न
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
What happens to the loudness of a sound if its amplitude decreases ?
Fill in the blank with suitable word :
Quality of sound depends on ........................
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
In SONAR we use:
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
