GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Varies according to the frequency of the sound
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Changes with a change in temperature
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Changes with a change in pressure
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None of the above
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Detailed explanation-1: -The speed of sound changes by about . 6 metres per second for every degree. Sound is transmitted through the air by compression waves, which, at a small scale, depend on molecules transferring energy one to another. Air molecules have more energy at higher temperatures, which means they vibrate faster.
Detailed explanation-2: -Hence, As the temperature increases, the speed of sound travel faster through the vibrations.
Detailed explanation-3: -In the lower atmosphere, variations in the speed of sound with altitude are dominated by temperature and wind speed changes; the vibrational and rotational relaxation frequencies, which depend on the ratio of frequency to pressure (f/P), are in the kilohertz to megahertz range.
Detailed explanation-4: -Temperature is also a condition that affects the speed of sound. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.
Detailed explanation-5: -So we can see that the speed of sound increases by 0.61 ms−1 for each 1oC rise in temperature.