Advertisements
Advertisements
Question
Name two sources of sound.
Advertisements
Solution
Each vibrating body is a source of sound. We, the human beings, produce sound when our vocal cords vibrate on blowing air through them by our lungs. Some animals like birds, frogs etc., also produce sound due to vibration of their vocal cords. But bees do not have the voice-boxes. They produce sound by moving their wings up and down very fast.
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
Sound is produced when a body ______.
Explain why you can predict the arrival of a train by placing your ear on the rails without seeing it.
What minimum distance is required between the source of sound and the reflecting surface to hear an echo ? Give reason.
What is the name of the strings which vibrate in our voice box when we talk?
A device called oscillator is used to send waves along a stretched string. The string is 20 cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the strings.
(a) what is their wavelength?
(b) what is their frequency
(c) what is their speed?
When the pitch of note produced by a harmonium is lowered, then the wavelength of the note :
The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is __________.
How are different sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation?
Infrasound can be heard by
______ is produced when an object is set to vibrate.
