[lee martell]

Most of us Non-Musicians would know what we were looking at, even if the power chord were properly diagramed.
If we heard it, many of us would get it.

[lee martell]

...would not know...

[steve86]

Does it sound cool to do a slide from one power chord to another?

[Flatus I. Maximus]

Try this. Cheap Trick, Live at Budokan, "Surrender." Nothing but power chords. https://m.youtube.com/watch?v=ZbkypX1OhZ0