A Thread for Random Thoughts ...

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Oxo

Guru
Location
Cumbria
What is another word for thesaurus?
 

marinyork

Resting in suspended Animation
Location
Logopolis
Why do mirrors seemingly reverse left and right but not top and bottom?

In three dimensions you can have a right-handed coordinate system and a left-handed coordinate system.


220px-Cartesian_coordinate_system_handedness.svg.png


Two of the three axes will be in the same plane, a 3rd one will be offset - say 90 degrees, but could be anything that isn't coplanar. You can flip one of these three axes to get a different system. You can't 'reverse' two directions at the same time and end up with a different coordinate system. If you reverse say y and z you still get the same coordinate system just rotated around wrt one axis. If I reverse either 1 or 3 I end up with the other coordinate system! So reversing two doesn't work. I hope that's correct and isn't total gibberish (possible).
 

TVC

Guest
One cubic meter of the sun produces less energy than a human body.
 

hotfuzzrj

Guru
Location
Hampshire
That's the place. And I live right on the river about 20 yards from the Danube bike path.

Cripes, I used to live near Hohenzollern Gymnasium across the river from the Schloss. What on earth is another English speaker doing there?! I was the only one in 2002-2003!!
What a wonderful place, I bet the cycling is beautiful there.
 

hotfuzzrj

Guru
Location
Hampshire
It is (unfortunately) very possible ... You take a biscuit from the packet, dunk it in your tea, reach for another and then discover to your horror that you just ate the last one! :cry:

Sorry ColinJ, I respect your authority when it comes to the CC forum however this ( ^ ) is surely a schoolboy error - no spare packets in the cupboard?! Planning, man! ^_^
 

ColinJ

Puzzle game procrastinator!
Sorry ColinJ, I respect your authority when it comes to the CC forum however this ( ^ ) is surely a schoolboy error - no spare packets in the cupboard?! Planning, man! ^_^
I'm planning one day to be able to wear trousers with a 32" waist again so I generally don't have those demon biscuits in the house! (Unless someone else brings them in ... :whistle:)
 
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