Advertisements
Advertisements
Question
How is it possible to detect the filling of a pitcher under a tap by hearing its sound at a distance?
Solution
As the water level in the pitcher increases, the length of the vibrating air column above the water surface decreases, and hence the frequency of the sound produced increases i.e., the sound gets shriller.
APPEARS IN
RELATED QUESTIONS
An enemy plane is at a distance of 300 km from a radar. In how much time the radar will be able to detect the plane? Take velocity of radio waves as 3 x 108 ms-1
A person is standing at the seashore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. The person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 ms-1 then calculate:
1) the distance between the observer on the ship and the person on the shore.
2) the distance between the cliff and the observer on the ship.
The pitch of a stringed instrument is increased by .................. tension in string.
Figure shows two jars A and B containing water up to different heights. Which will produce sound of higher pitch when air is blown on them?
Figure shows four waves A, B, C, and D
Name the wave which shows
(a) a note from a musical instrument,
(b) a soft note
(c) a shrill note.
Draw a diagram to show the wave pattern of high pitch note and a low pitch note, but of the same loudness.
Give scientific reason for the following:
Windows sometimes rattle when the low notes of a pipe organ are sounded.
How can one distinguish the sounds of two musical instruments even if they are of the same pitch and same loudness?
When a gun is fired at a distance, why is it that the flash is seen almost instantaneously while the sound is heard a little later?
The loudness of a sound depends on its pitch.
