position units


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905290504
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position units

Postby 905290504 » Mon Oct 26, 2020 7:21 pm

if the problem gives an uncertainty of position in nm should I convert to m, or vice versa? thanks!

Jaclyn Dang 3A
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Re: position units

Postby Jaclyn Dang 3A » Mon Oct 26, 2020 7:32 pm

I keep it in m since velocity is m/s. Hope this answers your question

Cecilia Cisneros 1J
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Re: position units

Postby Cecilia Cisneros 1J » Mon Oct 26, 2020 7:51 pm

I convert to m to be consistent with the velocity (m/s) and momentum (kg*m/s). I think that is always the best way to go! So long as all your units match up you should be good to go.

Racquel Fox 3L
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Re: position units

Postby Racquel Fox 3L » Mon Oct 26, 2020 7:52 pm

I think you would always convert nm to m unless it's specified otherwise.

aashmi_agrawal_3j
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Re: position units

Postby aashmi_agrawal_3j » Wed Oct 28, 2020 5:33 pm

You should covert to meters as that is the SI unit and will be consistent with the other measurements.

Helena Hu 3E
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Re: position units

Postby Helena Hu 3E » Wed Oct 28, 2020 9:18 pm

Generally speaking, your answer should always follow SI units (meters, grams, etc.) unless it is specified to be converted to other units. Even then, you should be converting anything that is not the correct SI units, and then converting to the specified units (Angstrom, kg, nm, etc.) at the very end once you find your answers.

Massimo_Capozza_1H
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Re: position units

Postby Massimo_Capozza_1H » Wed Oct 28, 2020 9:23 pm

You can't use the uncertainty equation to find mass or velocity, correct? Do you have to use wavelength=h/p?

Binyu You
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Joined: Wed Sep 30, 2020 9:37 pm

Re: position units

Postby Binyu You » Thu Oct 29, 2020 9:40 am

I would like to keep it in meters because velocity's unit is m/s. Keeping it consistent to meters it more convenient and ensures you to make less mistakes.

KKrivenko_3J
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Re: position units

Postby KKrivenko_3J » Thu Oct 29, 2020 9:52 am

I think it's best to convert it to meters, so it is consistent with units of velocity (m/s) and momentum (kg*m/s) and you don't make mistakes when calculating the final answer. Then, if the problem asks you to give your final answer in nm, just convert it. Hope it helps :)

Malakai Espinosa 3D
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Re: position units

Postby Malakai Espinosa 3D » Thu Oct 29, 2020 10:04 am

since we have momentum in the uncertainty equation, we must use meters. This is because momentum uses velocity with SI units m/s. It is always just easier to convert nm to m.

Ariel Guan 1G
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Re: position units

Postby Ariel Guan 1G » Thu Oct 29, 2020 10:15 am

You would convert to meters! Remember that SI Units for length is in m, so you should always use meters to stay consistent

haileyk
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Joined: Wed Sep 30, 2020 10:03 pm

Re: position units

Postby haileyk » Thu Oct 29, 2020 10:17 am

Hi!

While you're solving the problem, you should always convert to meters since it is an SI unit. Sometimes the question will ask for the wavelength in other units like nm, but that should only be converted at the very end.

Adam Bustamante 3J
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Re: position units

Postby Adam Bustamante 3J » Thu Oct 29, 2020 5:28 pm

I would always make sure to first convert nm or pm to m, in order to stay consistent with the units used in the uncertainty equation (m/s) when solving for velocity. Unless specified otherwise, convert to m.

Brenda Silva 2L
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Re: position units

Postby Brenda Silva 2L » Thu Oct 29, 2020 6:24 pm

It would be best to convert nm to m because the units for velocity are m/s therefore you would have the same units when solving the problems.

AnjikaFriedman-Jha3D
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Re: position units

Postby AnjikaFriedman-Jha3D » Thu Oct 29, 2020 6:26 pm

For the uncertainty principle, you should use meters and kilograms because this allows for the appropriate unit cancellation

Ryan_Kien_1L
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Re: position units

Postby Ryan_Kien_1L » Thu Oct 29, 2020 6:38 pm

I like to convert things into SI units as soon as possible, so I don't forget later.

Gigi Elizarraras 2C
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Re: position units

Postby Gigi Elizarraras 2C » Thu Oct 29, 2020 8:47 pm

I would for sure convert nm to m whenever you have to plug in values to equations. Because meters is an SI unit you must use it in equations to make sure of unit consistency:)

Charlie Russell 3F
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Joined: Wed Sep 30, 2020 10:01 pm

Re: position units

Postby Charlie Russell 3F » Thu Oct 29, 2020 8:48 pm

Since m is the SI unit, ALWAYS convert to the SI unit unless the problem asks for a different unit.

Margaret Xu 2F
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Joined: Wed Sep 30, 2020 9:36 pm

Re: position units

Postby Margaret Xu 2F » Fri Oct 30, 2020 2:01 am

For the Heisenberg uncertainty equation, I believe you always use meters in order to keep the units consistent (since velocity is also written in meters/sec). This way they'll cancel out when calculating.

Britney Tran IJ
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Joined: Fri Aug 30, 2019 12:18 am

Re: position units

Postby Britney Tran IJ » Fri Oct 30, 2020 3:29 am

I would keep it in m so that it cancels out with velocity(m/s)


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