Through the string connecting the cans. This string must be kept under tension at all times for the device to operate. Therefor the two cans must be on a direct line of sight with no obstructions to interfere with the string.
By making the string tighten for the particles to go through
it differs by the vibrations
hello
The telephone would have no use to someone in the past because they would have the only one. This would make it impossible for them to contact anyone. Also if it was too far in the past there would be no electricity making this telephone even more useless. Almost as useless as this question.
A cellular telephone within a cell communicates to the call tower, which in turn is connected to the cellular telephone switching office (CTSO) by the telephone line. The telephone switching Office is then connected to the local telephone system. If the cellular telephone moves from one cell to another, the cellular telephone switching office then hands the connection from one cell to another.
Whoa! A talking telephone! *Beep beep* "Sorry I don't understand, 'Whoa! A talking telephone'".
Hmmm, another ONE word for past and future? How about, "time."
the telephone
Nothing
That phenomenon is known as resonance.
That can be caused by resonance.
acoustic resonance