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Thinking Energy - Shared screen with speaker view
Tzuchien Tho
25:32
the north Koreans definitely already know...
Jonas Rademacker
41:45
Energy conservation is related to a continuous symmetry (invariance under translation in time). I do not think baryon number is on the same footing. Energy non conservation would be a big, fundamental problem. Baryon number violation is actually part of the Standard Model.
Joshua Robinson
57:36
If we prefer definition 3, do we not then require an interpretatoin of the "action" which is minimised in order to then understand energy?
J. Brian Pitts
58:28
Does Leibniz's conservation objection to Descartes's philosophy of mind get discussed in the new edition of your book? I have been trying to assemble that history.
Valeriya Chasova
59:14
You mentioned T and V, but what about L and H? E.g.in the principle of least action energy enters as a Lagrangian
Anthony Short
01:01:06
I liked your point about trying to resolve paradoxes by `doing the thing'. This is also true for quantum non-locality, where the best way to understand is to try to devise a strategy yourself to win a non-local game.
J. Brian Pitts
02:08:39
The assumption that energy should be positive is one reason why massive graviton theories were rejected in the early 1970s. There is a bit of controversy whether that was necessary. It seems somewhat plausible to me that there is no problem classically.
jennifer
02:49:40
Thankyou Ian :) Liked your talk - just want to point out the difficulty of "orange fluid" - too reminiscent ot CALORIC!
Alessio Bernardelli
02:49:51
As far as I am aware, this model is only adopted in England. Wales, Scotland and NI are still using Forms of Energy as their teaching model.
David Richardson (STAFF)
02:53:59
Can I make a comment
David Cobb
02:54:28
Yes David please do
Joseph Bellina
02:55:30
There is of course the question of how one would know that the idea, I’m avoiding the word concept, is understood by students. I don’t know of a good assessment of conceptual understanding.
Karim Thebault
02:59:03
Thanks everyone! I need to “go” to give a talk in Warsaw now…
Karim Thebault
02:59:11
Fascinating!
David Cobb
02:59:17
Thanks Karim - thanks again for talking and good luck with next talk
Anthony Short
03:00:52
If F: Don't you get the same issue with listing the types of store, as you had with number of forms of energy
David Cobb
03:01:07
Thanks Tony
Anthony Short
03:02:34
Q: Just to clarify my understanding, if an object would normally have two forms of energy (e.g. kinetic and gravitational) would you give it two different 'beakers' for the orange fluid?
B Ickringill
03:03:44
can I make a comment?
David Cobb
03:03:56
OF course. I'll bring you in in a sec
David Richardson (STAFF)
03:10:46
If it would be useful - I am very happy to run a "This is how we try and do it in school" presentation at a later date. From the school of education.
Riana Henry
03:11:16
Thanks!
Anthony Short
03:11:42
I do :)