Advertisements
Advertisements
प्रश्न
In fig. shows a snap shot of a wave from of frequency 50 Hz in a string. The numbers in the diagram represents distance in centimeters. Fpr the wave motion, find
(a) Wavelength,
(b) Amplitude,
(c) Velocity.
Advertisements
उत्तर
(a) Wavelength = Distance between two successive crests or two successive troughs=10 cm
(b) Amplitude = Maximum displacement of the particles from the mean position = 4 cm
(c)
Velocity= frequency × wave length
Given, frequency = 50 Hz,
wavelength= 10 cm= 0.1 m
.·. Velocity= 50 x 0.1=5 m/s
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
The frequency is measured in hertz.
Fill in the blank.
The number of times a body vibrates in one second is called its ______.
The flash of a gun is seen by a man 3 seconds before the sound is heard. Calculate the distance of the gun from the man (Speed of sound in air is 332 m/s).
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
What is sound? What causes it to produce?
A person fires a gun and other boy at a distance hears the sound of the fire 2.5 s after seeing the flash. If the speed of sound in air is 330 ms-1, find the distance between the boys.
What is sound? Explain with example how does sound travel in a medium.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case
Sound cannot travel through ______.
