Today Delancey Place is posting a review of Seven Brief Lessons on Physics by Carlo Rovelli. The topic is "heat", how it is produced from friction and when it is relevant - showing past and future but not relevant in such as the motion of planets. Then, he says it is totally irrelevant in the motion of the planets where we see no past and future.
Hoping I am reading this right, my question is why is there no friction to create heat in the motion of the planets? What about the heat from the sun and the friction created within the sun by motions from the various elements therein which I think heat to different caloric levels? Doesn't the friction of these elements create heat that is passed to the planets?
That, of course gets to the question of what created the motions that created the friction and why are they different (I think). But we will skip the "Where is the beginning?" bit. For now, isn't heat from the sun passing to the planets, creating motion of the planets?
The newsletter source is (email inbox link redacted)
If past experience is any promise, some of you may not be able to access this by way of that link. If not, perhaps you can find it at <<delanceyplace.com>> and a search for Seven Brief Lessons on Physics by Carlo Rovelli, subtopic: heat.
Thank you for thoughts on my question.
Edited by GAHD, 25 October 2019 - 07:43 AM.
(email inbox link redacted)