Electronic Principles
Waveforms are graphs that show:

amplitude on the vertical axis and frequency on the horizontal axis
the passage of time on the vertical axis and amplitude on the horizontal axis
frequency on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and the passage of time on the horizontal axis
None of these

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Electronic Principles
The south pole of a magnet is the one:

None of these
that has its molecules arranged in a random pattern
that would be attracted to the earth's south magnetic pole
that would be attracted to the earths north magnetic pole
that would be repelled by the north pole of another magnet

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