The present teaching / learning material is divided into two parts
The content of Part 1 is primarily used to prepare for an electricity course about propagation processes on a double line. The key terms here are pulse and wave propagation, superposition and reflection.
Assuming that beginners will find an easy access to a mechanical than to electrical systems, the above topics are first applied in part 1 to propagation processes in linear tubes, filled with gas or liquid.

 

In part 2 the same topics are repeated and applied to the electrical case of transmission processes on a double line, demonstrating the similarities and differences between these two systems.
The assumption and hope is that the invested extra time for studying the mechanical systems will pay off as added value in respect to deeper understanding, increased interest in topics of physics and technology and higher motivation for continuous learning.