This reminds me of the science camp I want to once where the mentally distressed kid (there's always one in any camp)... well his project was going to be a pulsed dye laser (xenon flash bulbs pumping a mirrored tube with dye...)
So the first thing he set about doing in the two week project was building concrete targets for his "laazzzer beeeem." (Long b4 Austin Powers was even born...)
Needless to say, he never got his project done because he fiddlefarted around with the targets, and when he stood up in front of the kids and profs to explain his power output, he got heckled from 13 yr olds because he didn't know the difference between peak and continuous power.
Nevertheless, he was still head-and-shoulders above what passes for a student in the halls of public ed today.
Just a silly story. What were we talking about? More coffee. GigaWatt="GW". Ironic?
About 45 years ago in high school, our physics teacher did not show up for class...and no substitute did either. I connected a single D cell ( 1.5 volt flashlight battery) to a simple 3 volt filament transformer and had the thirty students form a human chain by holding hands up and down the rows.
I gave one student at one end of the chain, one lead from the transformer and another student at the other end of the chain, the other lead, and connected the battery. I said does anyone feel anything? NOoooooo.
Then I disconnected the battery!
The collapsing magnetic field, when I disconnected the battery, brought all 30 students out of their chairs and back down into them at the same exact time. We were on the second floor of a cement school building. Has anyone else seen or heard what happens when 30 X 100 lbs hits a cement floor in a school at once?