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/sci/ - Science & Math


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5100386 No.5100386 [Reply] [Original]

like wtf

the thing gains atoms? where do these atoms come from? someone explain pls

>> No.5100396

It does not gain atoms. It gains kinetic energy. Mass is just a form of energy, hence it "gains mass." That's not a very good way of thinking about it, though.

>> No.5100403

<div class="math"> m = \frac E {c^2}</div>
More energy = more mass

>> No.5100424

>>5100396
It doesn't gain mass due to kinetic energy, but due to Lorentz transformation.

>> No.5100433
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5100433

>>5100386
>because it doesn't

The notion is "relativitic mass" is outdated by 60 years. It is not taught or used by the vast majority of the physics community.

It was discontined because faggots like you made the ridiculous conclusions you make, and got totally confused.

When we talk about mass now, we only talk about rest mass. This is the mass the object see's of itself.

>> No.5100443

My lecture notes from last year.

Can't remember if there is much useful in there.

https://rapidshare.com/files/3512694285/just for you_ OP.rar

>> No.5100449

>>5100403

This is wrong. The full equation is E^2= p^2c^2 + m^2c^4. The E=mc^2 part doesn't take kinetic energy into account at all.

>>5100424

No, it doesn't gain mass at all.

>>5100396
>>5100433

Correct.

>> No.5100459 [DELETED] 

>>5100433
>It is not taught or used by the vast majority of the physics community.
Even the most used undergraduate physics textbook uses it (Fundamentals of Physics by Halliday and Resnick) and so do many other books.

>> No.5100470

>>5100443
And another thing, that course was given by fucking Brian Cox. He was a great storyteller, and was a great lecturer.

I got a 97 in the exam so there must be something useful somewhere there.