Maple TA 26-1 Quiz

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Maple TA 26-1 Quiz Empty Maple TA 26-1 Quiz

Post  sck105 on Thu Apr 23, 2009 10:47 am

Does anyone know how to do questions 2 and 3?

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Maple TA 26-1 Quiz Empty Questions

Post  Guest 91 on Thu Apr 23, 2009 12:05 pm

does anyone know how to do any of them at all????

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Maple TA 26-1 Quiz Empty Hint on this section of Hw

Post  super mo on Thu Apr 23, 2009 11:58 pm

You MUST go past the sheets that is stated in the question for 26_1, 2, and 3. Go through all of the lecture sheets.
To get you started on 26_1 #1
Delta P= h/(2pim) where m is given
plug answer into KE = (P)^2/92*9.1*10^-31 then convert to eV

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Maple TA 26-1 Quiz Empty question 2 and 3

Post  sck105 on Sun Apr 26, 2009 11:52 am

can someone plz help with number 2 and 3?

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Maple TA 26-1 Quiz Empty question 3 and 4

Post  hwilson on Sun Apr 26, 2009 2:10 pm

Does anyone have any idea how to do questions 3 and 4 on this I am really struggling.....please help me????

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Maple TA 26-1 Quiz Empty question 2 and 3

Post  craziecu on Sun Apr 26, 2009 8:04 pm

I am really having trouble with 2 and 3 as well anyone have anything?

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Maple TA 26-1 Quiz Empty number 2

Post  phy-six on Sun Apr 26, 2009 9:40 pm

You are using the same equation as for number 1, but no need to divide by (2 * 9.1e-31) just divide by 1.6e-19.

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Maple TA 26-1 Quiz Empty question 3

Post  phy-six on Sun Apr 26, 2009 10:01 pm

Basically 2* L (given), convert to nm. Answer is negative.

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Maple TA 26-1 Quiz Empty question 4

Post  phy-six on Sun Apr 26, 2009 10:15 pm

Follow the problem on page 22 of the CD, your final answer will be in eV, just convert to megaeV and you get your final answer. Answer is positive.

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Maple TA 26-1 Quiz Empty question 4

Post  sjames on Sun Apr 26, 2009 10:22 pm

I still cant figure out 4 can someone please help me out?

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Maple TA 26-1 Quiz Empty question 1 and 4

Post  cuteprin on Sun Apr 26, 2009 11:14 pm

I have tried everything for number one and four can someone please post a detailed description of how they solved it????????????? pleassseee?

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Maple TA 26-1 Quiz Empty question 4

Post  Guest123 on Sun Apr 26, 2009 11:22 pm

please someone kindly help out! I've been stuck on question 4 for a long while! thanks!

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Maple TA 26-1 Quiz Empty Number 4 Hint

Post  6 more c on Sun Apr 26, 2009 11:41 pm

For number 4 the numbers you are getting are in J, you'd like them in MeV...the conversion is 1.609E-13J = 1 MeV. Best of luck.

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Maple TA 26-1 Quiz Empty Re: Maple TA 26-1 Quiz

Post  6 more c on Sun Apr 26, 2009 11:44 pm

Oh yea, and use the formula on Sheet 16'.

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Maple TA 26-1 Quiz Empty question 4

Post  sck105 on Sun Apr 26, 2009 11:45 pm

Can you explain how to do it (the question not the conversion) cuz I cant figure it out?

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Maple TA 26-1 Quiz Empty number 2

Post  :) on Mon Apr 27, 2009 12:33 am

hello, i'm still not understanding this question, i tried it my way then modifying according to what was posted..

p= h/ (2 pi * m)

then square this and divide by (1.6x1-&-19) instead of by (2 * 9.1x10^-31)

that is what i tried to no avail Sad

can someone spot what i am doing something wrong here?

:)
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Maple TA 26-1 Quiz Empty Re: Maple TA 26-1 Quiz

Post  6 more c on Mon Apr 27, 2009 12:34 am

soo...


KE = ((h^2)*(n^2))/(8*m*L^2)



m = mass given in problem
h = 6.6E-34
n = quantum number
L = Given Width

The number you get will be in Joules, remember to convert to MeV.


Best of Luck.

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Maple TA 26-1 Quiz Empty Reply to :)

Post  6 more c on Mon Apr 27, 2009 12:36 am

I don't think you need to square your original number.

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Maple TA 26-1 Quiz Empty thank you 6 more c

Post  :) on Mon Apr 27, 2009 1:03 am

heheh thanks, you're right! Very Happy

:)
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Maple TA 26-1 Quiz Empty Help!

Post  Delilah on Mon Apr 27, 2009 1:08 am

i've tried everything and i still keep getting number 1 and 4 wrong.

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Maple TA 26-1 Quiz Empty Re: Maple TA 26-1 Quiz

Post  Sss on Mon Apr 27, 2009 1:12 am

What is the m in number 2?

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Maple TA 26-1 Quiz Empty Hey

Post  Leland on Mon Apr 27, 2009 4:40 am

After looking at this for a good 10 minutes I realized what these people are trying to say:

1: (h/2*pi*m) m is the number they give you, the dimension (in my post m = dimension)
((ans)^2)/(2*9.1E-31*1.6E-19) = final ans (negative)

2: same thing but divide ans^2 by 1.6E-19 instead (this didn't work, still working on a solution)

3: 2*L (given) / E-9 = ans (neg)

4: KE = ((h^2)*(n^2))/(8*m*L^2) = ans / 1.6E-13 = ans in Mev (positive)

m = mass given in problem
h = 6.6E-34
n = quantum number
L = Given Width

these are all just other people's explanations organized more clearly, if someone could post a CLEAR description of #2 please do so

Leland
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Maple TA 26-1 Quiz Empty question 2

Post  sjames on Mon Apr 27, 2009 9:26 am

Can someone please help with number 2 this is the only one I cant figure out and I have been working on this since yesterday. PLEASE HELP?????

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Maple TA 26-1 Quiz Empty Q #2

Post  Guest001 on Mon Apr 27, 2009 10:09 am

first: h/(2*pi*the #given)=ans
then: ans/1.6E-19=final answer (neg)

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Maple TA 26-1 Quiz Empty Re: Maple TA 26-1 Quiz

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