hw problem 1B.23

[Joanna Mendoza 3J]

problem: What is the velocity of a neutron of wavelength 100. pm?

when we are given the wavelength in pm or any other unit, do we need to change it to nm before we plug it into our equation?

[Vicki Liu 2L]

It depends on the equation you're using because you want to make sure the unit for wavelength matches the units of other constants/values so that all the units cancel out nicely. In this case and most cases in general, wavelength should be changed to meters before being used in calculations.

[Alexa Mugol 3I]

Actually, I believe most equations use meters for wavelength. So you would convert the given wavelength, whether in nm or pm, to m when doing calculations.

[Jasmine Vallarta 2L]

it would be easier to convert to meters first as the equations use m and not pm or nm

[Kristina Rizo 2K]

Adding on to this question, does anyone know if we will be given a chart of mass values for future tests? Because in the question, we were only given the wavelength and not the mass of a neutron.