Mass spectrometer with a Lead element

[requied]

Was the difference between m₁ and m₂ supposed to be 1.67x10^-27? I wonder if I made the wrong calculation.
m₂ - m₁ = 0.02x10^-25 = 2x10^-27. Does a 0.33 slip cause a problem? I hope does not :)

 

[phyzguy]

Was the difference between m₁ and m₂ supposed to be 1.67x10^-27? I wonder if I made the wrong calculation.
m₂ - m₁ = 0.02x10^-25 = 2x10^-27. Does a 0.33 slip cause a problem? I hope does not :)

In Post #27 you wrote:
m1 = 3.42*10-27x205.974 = 3.42*10-25
Where did 3.42*10^-27 come from? Also, the result is not what my calculator says. And you should be including units.

 

[requied]

Where did 3.42*10^-27 come from?

Oh, I thought I fixed it when I see it first time. So, actually 1AMU = 1.66X10^-27 and m1 = 205.974*1.66x10^-27 = 3.4191684×10^-25 = 3.42x10^-25. But I can't edit the post #27 now.

Also, the result is not what my calculator says.

It may says the same result now I guess.

And you should be including units.

I'm going to take care of it. Thanks for notice.

edit: I think only latest posts can be edited. So #27 will not be able to be changed.

 

[phyzguy]

So then m2 - m1 = 1 AMU = 1 neutron mass, right?

 

[requied]

I was talking about the same thing at #31. And because of we can't use these as m2-m1 in $(r_2 - r_1) = r_2 (1 - \sqrt{\frac{m_1}{m_2}})$ I calculated these m2 and m1 one by one. So in this way, we don't have to use actual m_neutron I think. What do you think?

 

[phyzguy]

You're right. The original problem didn't ask you to use the neutron mass, it just said, "The mass difference between two isotopes is sometimes just a neutron mass. The spectrometer should separate them very well."

 

[requied]

You're right. The original problem didn't ask you to use the neutron mass, it just said, "The mass difference between two isotopes is sometimes just a neutron mass. The spectrometer should separate them very well."

Would you like to add something else? Because I am starting over to do the homework.

 

[phyzguy]

Would you like to add something else? Because I am starting over to do the homework.

I think you've got the idea. A couple of things to remember:
(1) Clearly state the assumptions you are making.
(2) Make sure to keep enough significant figures so the error in your final answer is less than 10%, especially when subtracting two similar sized numbers like r2-r1.
(3) Always include the units!

 

[requied]

I think you've got the idea. A couple of things to remember:
(1) Clearly state the assumptions you are making.
(2) Make sure to keep enough significant figures so the error in your final answer is less than 10%, especially when subtracting two similar sized numbers like r2-r1.
(3) Always include the units!

Thanks for everything ! All the best

 

[requied]

In velocity selector region, the question says "determine" but I did it like this below. I chose the voltage necessarily. Is there another way to determine these values?

 

[requied]

And also, how can I calculate power of this voltage supply? This can be thought of a capacitor?