You can hear the loud sound of your friend tapping on the desk in this activity. Give reason.
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Mechanical and acoustic waves
Simply tapping a finger on the corner of a table creates mechanical waves that spread in the air (the sound of tapping) and in the table (as vibrations.
When this vibration reaches an ear, it is translated into what we recognize as a sound. Sound vibration must travel through matter. This is typically air. ... Your tapping caused waves to travel through the material of the table and then through the air to your ears.
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Answer:sound is faster
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