Advertisements
Advertisements
Question
Fill in the blank.
Sound is produced when a body ______.
Advertisements
Solution
Sound is produced when a body vibrates.
APPEARS IN
RELATED QUESTIONS
Describe an experiment to estimate the speed of sound in air.
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
What is the SI unit of frequency?
Fill in the blank with suitable word.
When the frequency of the sound is increased, the wavelength ____________.
Draw the sketches of two waves A and B such that wave A has twice the wavelength and half the amplitude of wave B.
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?
A sound producing body is at considerable distance from a man. There can be four different media W, X, Y and Z between the sound producing body and the man. The medium X brings the sound to man most quickly whereas medium Z takes the maximum time. The time taken by medium W in bringing sound to man is less than that of X but more than that of Z. The medium Y, however, fails to bring the sound from the sound producing body to the man. Which medium could be the one :
(a) having on fixed shape and no fixed volume?
(b) having a fixed volume but no fixed shape?
(c) having the same composition as that on the moon?
(d) having a fixed shape and a fixed volume?
Match the following:
| Human larynx | Vibrations of metal arms |
| Loudspeaker | Vibrations in air column |
| Jal-Tarang | Vibrations in vocal cords |
| Tuning fork | Vibrations in strings |
| Sitar | Vibrations of screen |
Write the answer in your own words.
What is meant by vibration?
The vibrations of a simple pendulum are also known as _______.
