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kk! haha i stuck on this problem

the formula of wavelength is E=hc/λ??

the question now is how does the wavelength of an electron relate to the energy of light

|dw:1364196013585:dw|

it may related ,as I work on it with out the wavelength it still wrong

.__. this is too hard T^T

where m is the mass of the electron

i think i ll try that now

|dw:1364196120782:dw|

have you tried that @rosewhite

i think we need c of electron

yes, I used E=hc/λ and put c= 3*10^8 m/s

@rosewhite but you did not know E for light

if we use einsteins theory a new parameter comes in

which is the mass

okay the please try @rosewhite einsteins dual theory

how? @telijahmed

OK , I get C from the law and then get E and from it find lambda but still wrong !! @telijahmed

wow tough one eh @rosewhite sorry for wasting your time i am still working on it

Okey , if you got the answer, plz tell me @telijahmed

ok @rosewhite thanks for assisting

Can you tell me the answer if you got it? ;) thanks very much

anybody knows the answer? I can´t get it :(

Thank you very much :-)

What is the answer?? I couldn't get! please help me

velocity, not speed sorry

what would be n_i and n_f?? for rydberg's equation I mean

I tried nf = 3 and ni = 2 and nf = 2 and ni = 1, both answers given red

anybody got the answer....

This court is really hard TT_TT i'm only 10th grade student

could you try 3.121*10^-9 m ??

3.121*10^-9 is WRONG

can someone try 4.25*10^-12 please?? I only have one subission left..

submission*

4.25*10^-12 is wrong

wrong

Wrong

try 1.8746064 * 10^-6

WRONG

wrong

wrong

That question is driving me nuts. Did anybody get the answer to number 9?

no im suck on this one, 9 and number 1 if anyone can help?

no, did u get answer of 9

which number one did you get? tungsten reaction? didnt get number 9 yet.

i havent gotten any of the number 1's

i heard there are different questions for number 1: here's what i got:
0
35.28
52.336
15.38

but can we focus on the question that they asked here?

Everybody is struggling with it...

who has got K2TaF7 with Na?

has anybody answer of 9?

just opened a thread for #9

plz tell us the answer

me too, if had the answer, i would give in this situation ....

i tried it more than 40 times to solve..............

there key is in the smallest energy transition

that statement i gave an answer and someone said wrong

which one?

1.8746064 * 10^-6

its wrong by the red signal

i am not to sure but i used|dw:1364235425854:dw|

1.64064*10^-7 is correct!

now does anyone know how to do number 9?

1.64064*10^-7 is correct

anybody has 9 result.......

I T HAS NO RELATIONSHIP TO THE PROBLEM

I DID NOT USE THE RIGHT FORMULA BUT I AM COOL

9 plz?

i opened a threat for number 9

get yet?

I have different No 9 so I am opening too a new thread...

who has it?

velocity of 10^3 km/s . not 103

is any one of u got answer of 1st problem (MgO)?????

we have 7 min. only

Thanks so much

yupp

no that was wrong ..... :-(

timed out

i dont understand

wow some major cheating goin on here