Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
Explain how bats use ultrasound to catch a prey.
Fill in the blank with suitable word .
Sound waves are caused by ...................
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
How is an ultrasound scan for fetus (unborn baby) better than X-ray ?
Fill in the blank with suitable word :
Quality of sound depends on ........................
Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
Name an animal which navigates and finds food by ecolocation.
Explain how does SONAR work?
Expand the abbreviation of the term SONAR.
