Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

James Prescott Joule was born 200 years ago today

Posted on 12/24/2018 8:49:26 AM PST by Borges

Thought this bears notice.

Heat! Energy!


TOPICS: Science
KEYWORDS: jamesprescottjoule; stringtheory
Navigation: use the links below to view more comments.
first previous 1-2021-31 last
To: reg45
You did t study those famous scientists? (You passed 😀)
21 posted on 12/24/2018 9:49:30 AM PST by ProtectOurFreedom
[ Post Reply | Private Reply | To 15 | View Replies]

To: Rummyfan

LOL...love it! Merry Christmas!


22 posted on 12/24/2018 9:50:18 AM PST by ProtectOurFreedom
[ Post Reply | Private Reply | To 16 | View Replies]

To: reg45
Correction. Seems "autocorrect" is now "autodelete" and it doesn't like apostrophes and contractions. "You didn't study those famous scientists? (You passed 😀) "
23 posted on 12/24/2018 9:53:24 AM PST by ProtectOurFreedom
[ Post Reply | Private Reply | To 15 | View Replies]

To: Borges
Most people don’t know he’s related to this guy...

24 posted on 12/24/2018 9:56:25 AM PST by ReaganGeneration2
[ Post Reply | Private Reply | To 1 | View Replies]

To: ArtDodger

Yes! I will raise a ttoast to the new Awoke Jewel. She deserves it.


25 posted on 12/24/2018 11:09:04 AM PST by ProtectOurFreedom
[ Post Reply | Private Reply | To 17 | View Replies]

To: americas.best.days...

As an engineer in the electric field
I love to point out that the kilowatt- hour is a nonsensical term
That we should be talking about megajoules instead

W= j/s. Power is watts. Energy delivered is joules. J. =. W -s

Almost everyone is confused by this nonsense. Caused by Watt who had better politicians

Tesla is another who only now is getting well know. By Elon


26 posted on 12/24/2018 11:14:09 AM PST by Truthoverpower (The guvmint you get is the Trump winning express !)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Borges

Watt is better then Joule any day!


27 posted on 12/24/2018 11:49:42 AM PST by minnesota_bound
[ Post Reply | Private Reply | To 1 | View Replies]

To: ProtectOurFreedom

By the time of Joules research, coal fired steam engines were in development for over 100 years. Coal had become less expensive with time, as engine improvements added efficiency.

William Jevon noted that this improved efficiency actually resulted in more energy use, not less. Less expense allowed coal to be employed in more frivolous endeavors, such as rail transportation. It posed a paradox!


28 posted on 12/24/2018 8:42:32 PM PST by Ozark Tom
[ Post Reply | Private Reply | To 14 | View Replies]

To: Ozark Tom

It’s interesting that Joule was evaluating the recently-invented electric motor against coal power. Remember that, at the time he did this comparison (early 1840s), the concept of a central power station was still 40 years in the future. In other words, Joule was thinking about battery powered electric motors vs coal motive power. The batteries consumed zinc, so his efficiency comparison came down to the consumption of zinc vs consumption of coal.

That was some futuristic thinking!


29 posted on 12/25/2018 5:50:29 AM PST by ProtectOurFreedom
[ Post Reply | Private Reply | To 28 | View Replies]

To: 6SJ7; AdmSmith; AFPhys; Arkinsaw; allmost; aristotleman; autumnraine; bajabaja; ...
Thanks Borges.


· List topics · post a topic · subscribe · Google ·

30 posted on 12/26/2018 10:32:14 PM PST by SunkenCiv (and btw -- https://www.gofundme.com/for-rotator-cuff-repair-surgery)
[ Post Reply | Private Reply | View Replies]

To: ProtectOurFreedom

” He went on to realize that burning a pound of coal in a steam engine was more economical than a costly pound of zinc consumed in an electric battery. “

Bears application to the current debate of the economic value of renewable energy, electric cars versus “fossil fuel” use.


31 posted on 12/26/2018 11:41:39 PM PST by Redcitizen (I don't always lurk, but when I do, Freerepublic.)
[ Post Reply | Private Reply | To 14 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-31 last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson