Maple TA 26-1 Quiz

View previous topic View next topic Go down

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?

sck105
Guest


Back to top Go down

Questions

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

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

Guest 91
Guest


Back to top Go down

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

super mo
Guest


Back to top Go down

question 2 and 3

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

can someone plz help with number 2 and 3?

sck105
Guest


Back to top Go down

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????

hwilson
Guest


Back to top Go down

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?

craziecu
Guest


Back to top Go down

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.

phy-six
Guest


Back to top Go down

question 3

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

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

phy-six
Guest


Back to top Go down

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.

phy-six
Guest


Back to top Go down

question 4

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

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

sjames
Guest


Back to top Go down

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?

cuteprin
Guest


Back to top Go down

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!

Guest123
Guest


Back to top Go down

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.

6 more c
Guest


Back to top Go down

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'.

6 more c
Guest


Back to top Go down

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?

sck105
Guest


Back to top Go down

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?

:)
Guest


Back to top Go down

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.

6 more c
Guest


Back to top Go down

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.

6 more c
Guest


Back to top Go down

thank you 6 more c

Post  :) on Mon Apr 27, 2009 1:03 am

heheh thanks, you're right! Very Happy

:)
Guest


Back to top Go down

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.

Delilah
Guest


Back to top Go down

Re: Maple TA 26-1 Quiz

Post  Sss on Mon Apr 27, 2009 1:12 am

What is the m in number 2?

Sss
Guest


Back to top Go down

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
Guest


Back to top Go down

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?????

sjames
Guest


Back to top Go down

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)

Guest001
Guest


Back to top Go down

Re: Maple TA 26-1 Quiz

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum