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Absolute Hot

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Re: Absolute Hot

#41

Post by asdfman123 »

louisswiss wrote: post #26
sp332 wrote: post #12

Earlier quoted context omitted.

You can't accelerate anything to the speed of light without an infinite amount of energy. It just takes more and more energy to get closer to that speed. https://en.wikipedia.org/wiki/Speed_of_light#/media/File:Lor...

Does that mean it doesn't take more energy to accelerate an electron to the speed of light than a tennis ball?

It takes more energy to accelerate a tennis ball to 80% of the speed of light (0.8c) than it takes to accelerate an electron to 80% the speed of light. It takes more energy to accelerate a tennis ball to 0.999c than an electron to 0.999c.

But the faster and faster you go, the more energy is required. As the number approaches 100%, the energy required for each tiny fractional step goes up exponentially, so much so that it is impossible to accelerate either object to 100% of the speed of light. It just requires more, and more, and more energy.

Re: Absolute Hot

#42

Post by InitialLastName »

shaded-enmity wrote: post #37

Hmm, at school we were taught that the maximum temperature is such that wavelength of the emitted black-body radiation would equal Planck length, is this rationale no longer sound?

> maximum temperature is such that wavelength of the emitted black-body radiation would equal Planck length

... Also known as the Planck Temperature, which is the highest listed possibility for absolute hot in TFA.

Re: Absolute Hot

#43

Post by hinkley »

Wouldn't fusion trigger at much, much lower temperatures?

We are talking about the theoretical limit of temperature, but what is the practical limit? There's a point beyond which heating hydrogen just gets you helium and more heat, but heating anything heavier than iron gets you something colder than the inputs.

Re: Absolute Hot

#44

Post by Koshkin »

dfxm12 wrote: post #5
rocks wrote: post #4

What is "simple english" below languages? Never seen this before.

It's been around for nearly 15 years. It's geared towards younger folks, folks with learning disabilities that might make it hard for them to read and people who are learning English as a second language. https://simple.wikipedia.org/wiki/Simple_English_Wikipedia

Incidentally, for many readers of Wikipedia it may be not the language per se that is difficult to understand, so it would have been nice if there existed simpler versions of articles that otherwise may not be accessible to a lay person.

Re: Absolute Hot

#45

Post by sigi45 »

hinkley wrote: post #43

Wouldn't fusion trigger at much, much lower temperatures? We are talking about the theoretical limit of temperature, but what is the practical limit? There's a point beyond which heating hydrogen just gets you helium and more heat, but heating anything heavier than iron gets you something colder than the inputs.

Isn't fusion a reaction which has to happen? I would think that at that energy level there are no more elements which are able to form.

Re: Absolute Hot

#46

Post by teh_klev »

calhoun137 wrote: post #27

This is an amazing video by vsauce called How Hot Can It Get and which deals with the same concepts. I very highly recommend it for everyone. https://youtu.be/4fuHzC9aTik

Thanks for that, I hadnt' bumped into that channel before. After watching this one I watched the one on how to count past infinity....mind suitably blown :)

https://www.youtube.com/watch?v=SrU9YDoXE88

Re: Absolute Hot

#49

Post by _4ziu »

Bjartr wrote: post #16
SurrealSoul wrote: post #3

Looks like they found a way to measure my mix tape

If this were reddit I would've upvoted you, but this kind of cleverness should, if it constitutes the whole post, should be left to reddit. Now, should this thread ultimately hehehe a discussion on the virtues and approaches to creating mixtapes it would be another thing, but at this point in time I'm not seeing this as a positive contribution to discussion. That is why I downvoted your genuinely amusing comment.

tl;dr - no fun allowed.

Re: Absolute Hot

#50

Post by extragood »

Koshkin wrote: post #44
dfxm12 wrote: post #5

Earlier quoted context omitted.

It's been around for nearly 15 years. It's geared towards younger folks, folks with learning disabilities that might make it hard for them to read and people who are learning English as a second language. https://simple.wikipedia.org/wiki/Simple_English_Wikipedia

Incidentally, for many readers of Wikipedia it may be not the language per se that is difficult to understand, so it would have been nice if there existed simpler versions of articles that otherwise may not be accessible to a lay person.

Sometimes I don't care about the theory or equations related to a topic, and just want the gist of it quickly.
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