Like any subject, children need to be taught science in a way that they can understand. This usually involves turning lessons into games or fun projects. Learning how sound waves work can be an exciting venture for young children, especially if the project is interactive and visually stimulating.

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    The distance between successive wave fronts is increased, so the waves "spread out". Source. The Doppler effect for sound can be expressed as follows: Frequency change. Wavelength change. For approaching source speed v' should be negative, for receding source speed v' should be positive. v - speed of sound in the air.

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