Questions about physics

[Anonymous No.2893250]

If fire requires oxygen to burn, is there oxygen around the sun?

If you travelled at the speed of light, would you be able to see it?

If you made a ball of mirrors and emitted a light beam inside it, would it reflect forever?

[Anonymous No.2893263]

>>2893250
no

yes

no

[Krakengineer !!5XY+x7grkpt No.2893268]

1) Sun is a nuclear reaction, not combustion.

2) You can't travel at the speed of light.

3) Mirrors don't reflect 100% of the light which hits them.

[Anonymous No.2893272]

oxygen specifically is not necessary to burn. the sun does not have (much) oxygen, but generates its "fire" from nuclear fusion

no, you would not be able to ride alongside a light wave and see it still. things traveling at light speed travel at that speed for every single observer.

technically yes if your mirrors were 100% reflective.

[Anonymous No.2893290]

>>2893250
all elemnts up to iron can fuse, therefore there is oxygen in the sun, like >>2893272 said its not much.

speed of light is fixed and is not relative therefore no.

not in practice.

[Anonymous No.2893326]

>>2893290
Actually, ALL elements can fuse. It's just that nuclear fusion is endergonic rather than exergonic if the product is heavier than Iron 54.
Where do you think we get heavy elements from? They're formed by fusion in supernovae; the immense amounts of energy involved make fusion to heavy elements possible.

[Anonymous No.2893374]

Last question. How do magnets work?

[Anonymous No.2893378]

>>2893326
ah i see, thanks for the correction then

[Anonymous No.2893398]

>speed of light is fixed and is not relative

[Anonymous No.2893416]

>Sun burning
>Sun burning
>Sun burning
>Mfw i don't even have face after the cancer this post gave me.

[Anonymous No.2893425]

>>2893398
Even if you don't believe it, >>2893290 is right.

[Anonymous No.2893434]

>>2893374

[Anonymous No.2893464]

>>2893398

Thanks to relativity all observers measure c as the same(length contraction, time dilation, etc)

[Anonymous No.2893475]

>>2893464
Observe yes, if my car was going at c and i turned my lights on, the light would still travel away from me at c.

At the same time, if someone was watching while stationary, they would also see the light travelling at c.

[Anonymous No.2893769]

If you ended up somewhere in space, so far away from our universe, that it was unaffected by the slightest waves of heat,
what would the temperature be?

[Anonymous No.2893775]

if derp requires derp to troll are you a herp derp?

[Anonymous No.2893825]

>>2893775
No, that'd make you a derp