Question

i need algebra help....i have a formula
\[\huge \frac{r_2}{r_1} = \frac{t_1}{t_2} = \sqrt{\frac{M_1}{M_2}}\]

t_1 = 15
t_2 = 12
M_2 = 28.02

is it possible to get the value of r2?

Answer 1

nope

Answer 2

i don't think so

Answer 3

why not?

Answer 4

what do i need to get r2?

Answer 5

r1

Answer 6

and i suppose i cant get r1 either huh

Answer 7

what if the formula was \[\huge \frac{r_2}{r_1} = \frac{\frac{V_2}{t_2}}{\frac{V_1}{t_1}} = \sqrt{\frac{M_1}{M_2}}\]
where V)2 = v_1

is it possible then?

Answer 8

nope

Answer 9

still... no

Answer 10

wew...is it possible to get the value of V?

Answer 11

i would think not

Answer 12

ugh >.<

Answer 13

lol whatever you have for the middle thing will only give you the propotion of the other items

Answer 14

and btw why do you need this?

Answer 15

because i need to find the root-mean-square speed of a compound...it's a chem question...but since im just looking for an algebraic way to isolate r2 i figured math is a better place to ask

Answer 16

it looks like you essentially have:

y = mx; and are asking to find the value for y given that you know the slope only

Answer 17

uhhh is that a mispost @amistre64 ?

Answer 18

more like a mister.post ....

Answer 19

lol i'll take that as a yes

Answer 20

\[y = mx\]
\[\frac yx=m\]

m=t1/t2

y/x = r2/r1

Answer 21

anyway like i said this isnt really an algebra problem...it's a chemistry problem but i need to isolate r2

Answer 22

\[r2 = \frac{t2}{t1}r1\]

Answer 23

or however teh ts are stacked ...

Answer 24

we could also compare this to the law of sines if we want

Answer 25

okay...i think this is getting overcomplicated now o.O

Answer 26

you can determine an M part; but not a distinct r part is all

Answer 27

....so in layman's terms it's impossible?

Answer 28

correct, it is impossible

Answer 29

you couldve said that sooner :p lol