White Holes & the 2nd Law of Thermodynamics

AI Thread Summary
White holes are theorized to be the opposite of black holes, but their existence is debated due to potential violations of the second law of thermodynamics, which states that entropy in a closed system must increase over time. The discussion highlights a request for clarification on how white holes specifically contradict this law. A link to a Cornell University website is shared, providing additional insights into the topic. The conversation suggests a need for expert input from an astrophysicist to further explore these concepts. Overall, the relationship between white holes and thermodynamics remains a complex and intriguing subject.
PhiJ
Messages
44
Reaction score
0
I have read in wikipedia and other places that white holes cannot exist as they violate the second law of thermodynamics. I s'pose my question is a simple one. How?
 
Physics news on Phys.org
Perhaps this thread could be shifted to someplace where an astrophysicist could help...

For now you could read the linked website on the wikipedia page: http://curious.astro.cornell.edu/question.php?number=108
 
Last edited by a moderator:
Wow! Although the question still remains, that was an absolutely fascinating web page! Thank you very much!
 
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
Back
Top