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explain why electromagnetic waves are a reliable way to send signals.

explain the difference between fm and am radio waves.

AM radio is amplitude modulated, meaning that the amplitude of the carrier frequency is varying in the same manner as the audio signal you are transmitting. FM radio is frequency modulated, meaning that the frequency of the carrier frequency is varying in the same manner as the audio signal you are transmitting.

Explanation: Sorry I can't answer your first question, I hope and this helps. Good luck!

answer: the mildest forms of push polling are designed merely to remind voters of a particular issue. for instance, a push poll might ask respondents to rank candidates based on their support of an issue in order to get voters thinking about that issue. many push polls are negative attacks on other candidates.