/sci/ - Science & Math

question of relativity:

say joe is moving through space in a space suit at .5 the speed of light and jim, also moving through space in a space suit at .5 the speed of light. Joe and Jim are both head in opposite directions towards one another, will Joe see Jim and Jim see Joe? Will Joe or Jim be moving at the speed of light relative to one another?

>>1769433
i see i see, thank you

>>1769413
is there an equation for this? like x(hydrogen mass) * y(non hydrogen mass) = life time?

okay now i have a question about relativity!

say joe is moving through space in a space suit at .5 the speed of light and jim, also moving through space in a space suit at .5 the speed of light. Joe and Jim are both head in opposite directions towards one another, will Joe see Jim and Jim see Joe? Will Joe or Jim be moving at the speed of light relative to one another?

>>1769401
so what if a star has a higher percentage of non-hydrogen elements? Like say the star has more "sun spots?" than another of the same size.

what happens then? does the star just burn throung those as well?

bumpingggg

>>1769374
well mass yes, but what about heat? I would assume a star that burns twice as hot would last half the time right? Or do star's burn at constant temperatures relative to their size?

what variables decide whether a star becomes a black hole, supernova or just disintegrates? Is there a formula for finding out the probability of which scenario will occur?

for example: does the size, amount of hydrogen, and heat at which the star burns change the probability?

also, I don't remember what the exact end scenarios are for stars so if super nova isn't one of them it's because of my ignorance of stars, not trolling or whatever

>>1764944
yeah, i knew something was f-ed up in my chain >.< i do f(x) = h(g(x)) by the way not d/d

im going to bed but thank you everyone for the practice and intellectual stimulation ^^

>>1764857
I think i did it wrong . . . I did the g'(x) part first to get the inner (2x+1) = 2x part right?

>>1764788
okay let's see

f'(x) = 4 (2x+1) + (3x^2) *2(x^3(2x+1)^2))^2

the +1 after ")" through me off a bit but i think it just becomes 0 right?

>>1764823
WAIT I FOUND MY EXAMPLE HANG ON

f(x)=(x3+(2x+1)2+1)2
i think, but I'm not sure:
f'(x) = 2 * (3x^2) * 2(x^3(2x+1)+1)^2
i can't remember i think i do inner, then x^2, then the )^2 right?

>>1764749
if you're referring to a program I probably don't have it because I'm on mint atm, and no graphing calculator, I've been writing this all out

>>1764741
what is that?
Anymore practices similar to: >>1764666?

those are really helpful in practicing for me

thanks

>>1764727
still greek to me :/ I'm going to watch "introduction to limits pt 1-x" tomorrow so maybe it'll cover that. if not the textbook will.

thanks though

>>1764690
I'll tell you right now I won't be able to do that one. I have no idea how to plug these in, like:

does the D_x \cos(x) = -\sin(x) mean that sin = -dxcos(x)?

>>1764677
I will learn these ASAP then :O, tomorrow I mean. I have Algebra II homeowork . . .

thank you though, it's greatly appreciated

>>1764666
f'(x) = (10x + 3) * 3(5x^2+3+1)^2

>>1764661
haha, I'm glad I have this as resource honestly, you guys are really helpful sometimes when it comes to learning math (personally)

>>1764646
literally just learned them 5 minute ago :P, I'm getting a calculus textbook tomorrow so maybe that'll help me

>>1764636
okay
>>1764637
Im in algebra II right now (as a senior), because I didn't do well in early high school math :(, learning so i can get into Honors Physics by 2nd quarter
>>1764638
i saw
>>1764640
just read that, I'll watch some khan on this tomorrow
>>1764644
thank you

>>1764630
okay so . . .
in response to: >>1764564
it'd be:
f'(x) = 2cos uhmmm
f'(x) = cosx^2 * 2 * dx?

>>1764623
no idea what cosine is :x

Explain?