HW 1.41 Help with understanding final answer


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Alexander Hari 1L
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HW 1.41 Help with understanding final answer

Postby Alexander Hari 1L » Thu Apr 19, 2018 7:51 pm

I calculated the velocity of question 41: "What is the velocity of a neutron of wavelength 100. pm"
I used the equation v=(h x lambda)/mass of a neutron and got 3.96 x 10^-24m, but the answer in the back of the book says 3.96 x 10^3m. How is this the answer? What did I do incorrectly? Thanks!

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Re: HW 1.41 Help with understanding final answer

Postby Chem_Mod » Thu Apr 19, 2018 9:59 pm

The problem you made was with converting the de Broglie wavelength equation to calculate velocity. In your answer you said but when you convert the equation to solve for v you should multiply both sides of the equation by v then divide both sides by
to get that . If you plug in the values for h, mneutron, and you should get the answer of 3.96 x 103.


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