Introduction to Arithmetic

Introduction to Arithmetic

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(vibrations of the air) How does the air move to produce sound? (in waves) What happens to the ... is tossed into still water. The water moves away from the pebble in waves just like the air waves which produce sound. The eardrum, like any drum, is rather taut; it vibrates the same way any drumhead vibrates when it isanbsp;...

Title:Introduction to Arithmetic
Author:Cambridge Book Company, Joseph J. Brain
Publisher:Cambridge Book Company - 1972


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