Calculating velocity


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Maria Roman 1A
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Joined: Fri Apr 06, 2018 11:04 am

Calculating velocity

Postby Maria Roman 1A » Mon Apr 16, 2018 12:00 am

When given wavelength, how would velocity be calculated?

Chem_Mod
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Re: Calculating velocity

Postby Chem_Mod » Mon Apr 16, 2018 12:39 pm

You need to give me more information for me to answer this. Based on your question, it seems to be a de Broglie wavelength problem.

Steven Luong 1E
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Re: Calculating velocity

Postby Steven Luong 1E » Wed Apr 25, 2018 8:03 pm

Given the wavelength, this might be a De Broglie problem. Since Lambda-max = h/(mass x velocity), you should convert Lambda into meters and you are probably given a mass. The Planck's constant is h. Then just plug all the values in and solve for velocity.

Andre-1H
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Re: Calculating velocity

Postby Andre-1H » Sun Apr 29, 2018 6:10 pm

I'm pretty sure that the only way to calculate it would be if the mass of the object with that wavelength is given because otherwise with the DeBroglie equation there would be two unknown variables.

Mohamad Farhat 1L
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Re: Calculating velocity

Postby Mohamad Farhat 1L » Sun Apr 29, 2018 7:04 pm

typically you would use the debroglie equation. You would have wavelength = h over m times v. you would switch v and wavelength and solve for v.

Amir Akhavan 1E
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Joined: Fri Apr 06, 2018 11:01 am

Re: Calculating velocity

Postby Amir Akhavan 1E » Sun Apr 29, 2018 9:02 pm

To find velocity you can just use the equation that wavelength equals planks constant over mass times velocity. You should know the mass of the object such as an electron which will be given.


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