## Value of Delta X

$\Delta p \Delta x\geq \frac{h}{4\pi }$

Jasmine Reddy DIS 1E
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Joined: Fri Sep 28, 2018 12:17 am

### Value of Delta X

For our purposes, will the value of delta X always be the diameter of the atom?

Reva Kakaria 1J
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### Re: Value of Delta X

When we're given ∆x, it's usually the diameter of an atom, but one of the problems in the book uses diameter of a nanoparticle. I think in general we will be given some sort of diameter.

Laura Gong 3H
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### Re: Value of Delta X

Sometimes the question with give you a plus/minus value for deltaX (say +/-5) which means you have to double that value (deltaX=10) before plugging it into the equation.

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### Re: Value of Delta X

Yesterday at office hours the TA said delta X should be in meters

Jasmine Chow 1F
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### Re: Value of Delta X

The delta x in the equation is usually in meters and is often what is solved for or given. If it is in pm you would need to convert it to m so you can solve the problem.

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### Re: Value of Delta X

I agree with the previous replies, delta x is usually in meters (m). Delta x describes the position, sometimes the problem gives it as a radius which is the same thing as the position.

Imelda Mena 3I
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### Re: Value of Delta X

So if the radius is given that is the electron's uncertainty in position? Or do we have to multiple it by 2 so it can be the diameter?

Brandon Mo 4K
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### Re: Value of Delta X

I think we would have to multiply the radius by 2 to get the diameter. We want delta x to be the full range of where the electron could be.

Charles Gu 1D
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### Re: Value of Delta X

Delta X is usually the diameter in meters. If it is given in radius you should use that in meters.

Camille 4I
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Joined: Sat Aug 24, 2019 12:18 am

### Re: Value of Delta X

In the question 1b28, the diameter is given as 2.00x10^2 nm. Should I use 2.00x10^-7 meters for the diameter for delta X?