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Annie Ye
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Joined: Wed Sep 18, 2019 12:22 am


Postby Annie Ye » Sun Oct 13, 2019 12:44 pm

What is the minimum uncertainty in the speed of an electron confined within a lead atom of diameter 350 pm? Model the atom as a one-dimensional box with a length equal to the diameter of the actual atom.

Posts: 99
Joined: Sat Sep 14, 2019 12:15 am

Re: 1B.25

Postby VLi_2B » Sun Oct 13, 2019 1:01 pm

You should use Heisenberg's Indeterminacy Equation, delta p x delta x >= h/(4pi)
First, change the diameter from 350pm to meters, 3.50 x 10^-10 m. Then plug in all known values into the Heisenberg equation to solve for Delta p.
delta p = 6.63x10^-34/ (4pi x 3.50x10^-10m)
Then, just use delta p = delta velocity x mass to get the answer.

Ellis Song 4I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: 1B.25

Postby Ellis Song 4I » Sat Oct 19, 2019 2:08 pm

For this problem you use the equation but you break up into (mass of the electron)x

You can then plug in all your known variables and solve for

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