{"action":"opened","issue":{"url":"https://api.github.com/repos/ericmazur/PnPbook/issues/97","labels_url":"https://api.github.com/repos/ericmazur/PnPbook/issues/97/labels{/name}","comments_url":"https://api.github.com/repos/ericmazur/PnPbook/issues/97/comments","events_url":"https://api.github.com/repos/ericmazur/PnPbook/issues/97/events","html_url":"https://github.com/ericmazur/PnPbook/issues/97","id":108423888,"number":97,"title":"dissipated but not thermal ???","user":{"login":"JohnDenker","id":14043887,"avatar_url":"https://avatars.githubusercontent.com/u/14043887?v=3","gravatar_id":"","url":"https://api.github.com/users/JohnDenker","html_url":"https://github.com/JohnDenker","followers_url":"https://api.github.com/users/JohnDenker/followers","following_url":"https://api.github.com/users/JohnDenker/following{/other_user}","gists_url":"https://api.github.com/users/JohnDenker/gists{/gist_id}","starred_url":"https://api.github.com/users/JohnDenker/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JohnDenker/subscriptions","organizations_url":"https://api.github.com/users/JohnDenker/orgs","repos_url":"https://api.github.com/users/JohnDenker/repos","events_url":"https://api.github.com/users/JohnDenker/events{/privacy}","received_events_url":"https://api.github.com/users/JohnDenker/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-09-25T23:35:28Z","updated_at":"2015-09-25T23:35:28Z","closed_at":null,"body":"This is in some sense a corollary to item #35.\r\nOn page 158 in chapter 7.4 it says:\r\n> Second, when energy is dissipated, virtually all of it becomes thermal energy; the incoherent configuration energy associated with deformation, breaking, and abrasion is generally negligible compared to the energy required to cause these changes.\r\n\r\nI'm not sure what that means.  My best guess is that it means there is some fifth category of energy, not included in the four-way classification on page 156, i.e. not kinetic energy, not potential energy, not thermal energy, and not «source energy» (whatever that is).\r\n\r\nWhatever is going on here, it cannot be explained within the framework set up by the book.  I reckon there is zero chance that students will be able to figure it out based on the information they've been given.\r\n"}}