Advertisements
Advertisements
Question
Two astronauts cannot hear each other on the moon. Why?
Advertisements
Solution
Material medium is necessary for the propagation of sound. On the moon there is a vacuum, i.e. no air, therefore sound cannot propagate on the moon. Thus the astronauts can not hear each other.
RELATED QUESTIONS
State the ways by which the frequency of transverse vibrations of a stretch string can be increased.
What do you understand by free vibrations of a body?
On What factors does the natural frequency of vibration of a body depend?
State two ways of increasing the frequency of vibrations of a stretched string.
Explain why strings of different thicknesses are provided on a stringed instrument.
[Hint: Natural frequency of vibration of a stretched string is inversely proportional to the radius (or thickness) of string so notes of different frequencies can be produces by vibrating different strings.]
A wire stretched between two fixed supports, is plucked exactly in the middle and then released. It executes (neglect the resistance of the medium) ______.
Define the term Amplitude.
Explain why strings of different thicknesses are provided on a stringed instrument.
