No Stupid Questions

2309 readers

27 users here now

There is no such thing as a Stupid Question!

Don't be embarrassed of your curiosity; everyone has questions that they may feel uncomfortable asking certain people, so this place gives you a nice area not to be judged about asking it. Everyone here is willing to help.

ex. How do I change oil
ex. How to tie shoes
ex. Can you cry underwater?

Reminder that the rules for lemmy.ca still apply!

Thanks for reading all of this, even if you didn't read all of this, and your eye started somewhere else, have a watermelon slice 🍉.

founded 2 years ago

MODERATORS

Kokomheart@lemmy.ca

otter@lemmy.ca

-8

Why does thermodynamics laws look like a tautology ? (lemmy.ca)

submitted 1 year ago by A_A@lemmy.ca to c/nostupidquestions@lemmy.ca

14 comments fedilink hide all child comments

1^st^ law of thermodynamics :
There is something that will always be the same.
2^nd^ law of thermodynamics :
Everything else always changes and never will be what it was before.

you are viewing a single comment's thread
view the rest of the comments

[–] Rentlar@lemmy.ca 4 points 1 year ago* (last edited 1 year ago)

The 1st law discusses energy. The total energy contained within a system totally isolated from others will not gain or lose total energy, but it can be transferred between places or change forms.

The 2nd law discusses entropy. The total net entropy of systems in natural interactions always increases. This isn't in contradiction to the 1st law, because the same net energy is there, but after any thermodynamic process, that energy just takes on a form that is more entropic than before.

These laws haven't been "ordained" by anyone, just scientists' best guesses for how the world works using our observations.