How does changing the frequency affect the sound that you hear?

The loudness of a sound corresponds to the amplitude of the wave, and is measured in decibels. The frequency of a sound wave affects the pitch of the sound we hear. ... For a vibrating object like a tuning fork, this is also the natural resonant frequency of the sound source.

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.