Advertisements
Advertisements
प्रश्न
Describe an experiment to estimate the speed of sound in air.
उत्तर
To estimate the speed of sound in air suppose we choose two hills A and B about a kilometer apart. A person at the hill A fires a gun. Another person at the hill B starts a stopwatch as he sees the flash of the fire and stops it on hearing the sound. Thus, he measures the time interval between the seeing of flash and hearing of the sound. Let it bet second. Then measure the distance between the hills A and B. Let it be S meter.
The speed of sound V
= `"Distance (S)"/" Time (t)"`
= `"S"/"t" "ms" ^-1`
Experimentally,it is found that the speed of sound in air is nearly 330 ms-1
APPEARS IN
संबंधित प्रश्न
What is sound and how is it produced?
Describe an experiment to show that each source of sound is a vibrating body.
What minimum distance is required between the source of sound and the reflecting surface to hear an echo ? Give reason.
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
Can sound travel through vacuum?
What is the SI unit of frequency?
If a ringing bicycle bell is held tightly by hand, it stops producing sound. Why?
Fill in the blank with suitable word.
When the frequency of the sound is increased, the wavelength ____________.
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?
Sound is produced by ______.
