JAMB - Physics (1999 - No. 17)
If a sound wave goes from a cold air region to a hot air region, its wavelength will
increase
decrease
decrease then increase
remain constant
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When a sound wave moves from a region of cold air to a region of hot air, its wavelength will increase. This occurs because sound travels more quickly in warmer air due to the heightened energy of the air molecules, which allows for a longer wavelength while the frequency remains unchanged.