Advertisements
Advertisements
Question
How is it possible to detect the filling of a pitcher under a tap by hearing its sound at a distance?
Advertisements
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.
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
State the safe limit of sound level in terms of decibel for human hearing.
The pitch of a flute is decreased by ................... length of air column.
The unit of loudness is _______.
Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality? Give reason for your answer.
State three factors on which loundess of sound heard by a listener depends.
Give scientific reason for the following:
When a nail is hammering appears to get higher and higher in pitch.
Name the subjective property of light related to its wavelength.
Three musical instruments give out notes at the frequencies listed below. Flute: 400 Hz; Guitar: 200 Hz; Trumpet: 500 Hz. Which one of these has the highest pitch?
Draw a diagram to show the waveforms of a pure note and a musical note, of the same pitch and same loudness.
