1.

1. The distance between two adjacent crests (or troughs) of a wave is called its2. The distance travelled by a wave in one second is called3. The order of the speed of sound is4. Loudness of sound is measured in_5. The minimum distance between an observer and the obstacle for hearing an echo (at 20°C) isunit.

Answer»

1. Wavelength2. Frequency3. 3×10 ^84. Decibel5. 17.2m

thanks

1.Wavelength2.Frequency3.3×10^84.Decibel5.17.2m



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