The velocity of a sound wave decreases from 350 m/s to 250 m/s on passing from one medium to another. If the wavelength in the first medium is 3m, what is the wavelength in the second medium?
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Answer:
Sound, like all waves, travels at a certain speed and has the properties of frequency and wavelength. You can observe direct evidence of the speed of sound while watching a fireworks display. The flash of an explosion is seen well before its sound is heard, implying both that sound travels at a finite speed and that it is much slower than light. You can also directly sense the frequency of a sound. Perception of frequency is called pitch. The wavelength of sound is not directly sensed, but indirect evidence is found in the correlation of the size of musical instruments with their pitch. Small instruments, such as a piccolo, typically make high-pitch sounds, while large instruments, such as a tuba, typically make low-pitch sounds. High pitch means small wavelength, and the size of a musical instrument is directly related to the wavelengths of sound it produces. So a small instrument creates short-wavelength sounds. Similar arguments hold that a large instrument creates long-wavelength sounds.
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Answer:
உங்களுக்கு நேர்மையை கூட கொடுக்க முடியாதவர்களிடமிருந்து விசுவாசத்தை எதிர்பார்க்கும் ஸ்டோபோ