Re:Electron Band Structure in Germanium, My Ass
by sebzim4500 on Tuesday April 01, 2025 @11:49AM
(#43548226)
In the UK we called it ticket tape and it was terrible. The devices barely worked and they cause a bunch of friction so you end up calculating a value of 'g' that's off by like 30%.
Re:Electron Band Structure in Germanium, My Ass
by timthorn on Tuesday April 01, 2025 @01:22PM
(#43549314)
I think officially, we called it ticker tape, as in stock ticker - it was originally used to record stock prices transmit by telegraph.
Re:Electron Band Structure in Germanium, My Ass
by throwway120385 on Tuesday April 01, 2025 @10:21AM
(#43547103)
That's an interesting way to measure the passage of time -- just use something that produces a "regular distance" and derive a way from kinematics to calculate the acceleration from the change in the distance.
Re:Electron Band Structure in Germanium, My Ass
by mystified5016 on Tuesday April 01, 2025 @10:38AM
(#43547316)
The way boats historically measured speed was by dragging a rope behind them. The rope has knots tied with exact spacing. You drop one end of the rope in the water, and count how many knots pass you in a given time. That's then your speed in knots.
Re:Electron Band Structure in Germanium, My Ass
by sdenton4 on Tuesday April 01, 2025 @11:13AM
(#43547772)
Using this method repeatedly to guess how far you've moved over the course of days is, historically, a fantastic way to crash into the side of France in the middle of the night.
Re:Electron Band Structure in Germanium, My Ass
by SJC_Hacker on Tuesday April 01, 2025 @02:43PM
(#43550122)
Well the other problem is knowing where you are. The sun/stars can give you latitude. Longitude was nearly impossible until the advent of the marine chronometer in the latter part of the 18th century, and not "standard" on ships until the mid-1800s. There were earlier versions, which had poor accuracy and were not much better than dead reckoning
Re:Electron Band Structure in Germanium, My Ass
by thaumasiotes on Tuesday April 01, 2025 @04:26PM
(#43550968)
> You drop one end of the rope in the water, and count how many knots pass you in a given time.
Given that you're dragging the rope behind you, won't this number be zero?
Re:Electron Band Structure in Germanium, My Ass
by flir on Tuesday April 01, 2025 @05:11PM
(#43551392)
The rope has a mechanism for creating drag (a wooden board) at the end, and regularly spaced knots. You throw the board in the water, let the rope play out through your hands, and count the knots as they pass through your hands while watching a timer.
Our class had some kind of device that would either punch a hole, or make a mark on paper at a regular time interval. We attached a narrow strip of paper to the ball, and let it pull through the marking device as it fell from the bench to the floor. We then measured the distance between each mark, noting that the distance increased with each interval, using this to calculate g. I don't recall anything more than that, or how I did on that lab. I received a 50 one marking period for lack of handing in labs, but had a 90+ average otherwise in the class.