copper

Somehow it ended up in a heap of scrap copper.

You are as bad as the people who shatter car windows to steal a stereo or those who rip copper wiring out of houses.

It's also problematic as Telstra are doing worse and worse at maintaining the copper network that is relied upon.

No. Because copper isn't ferromagnetic, it will not be magnetized by the magnet, and consequently the magnet and the copper will not be attracted to each other.

We live in a world where people are routinely electrocuted trying to steal copper from live power wires and blown up stealing gasoline from pipelines.

But copper prices increased for eleven years after 1965, until 1976, and Zambia was unable to exploit this in a way that led to national progress.

It's so cool".Am I correct in assuming that if he did it all day, it would not actually be so cool, as the copper tube would be heated up by the induced currents?

The point is that as the magnet is falling through the copper tube it creates an electric current which then creates a magnetic field in the opposite direction of the magnet's movement.

Rather, the Zambian economy developed at a steady pace, beginning before the rise in copper prices, influenced mainly by an improving political climate at home.

You can see where the designer originally made room for a shield "can" to be soldered over the sensitive components, indicated by the exposed copper rectangle around the heatsink area.

If you consider switching the physical layer to an infrastructure basis you eliminate multiple fiber/copper paths under the street, multiple fiber/copper vaults in sidewalks and on street corners, and replace them with a common set of conduits.