How do you calculate speed using the De Broglie equation? [ENDORSED]

[Mario Reyes 1C]

I do not understand how to calculate speed using the De Broglie equation? Is it the same as calculating the velocity? If so, how do you calculate the velocity?

[Elijah E 1C]

Speed would be the same as velocity. Since the De Broglie equation is wavelength=Planck's constant/momentum and we know momentum is mass times velocity you can rearrange the equation to find velocity.

[Mario Reyes 1C]

So rearranged, the equation for velocity would be plancks constant / (wavelength)(mass) correct? I used this equation for #34 solving for speed and did not get the correct answer, which was the reason I was unsure if speed and velocity were the same.

[Jimmy lira-1G]

Just to clarify,

wavelength= h / m
h= plancks constant 6.626 x 10^-34 j s
m= momentum= velocity x mass
so
m= h/ wavelength
velocity= h/ wavelength / mass
- Jimmy lira 1g

[JulietOttenberg-1C]

yes velocity is (planck's constant)/(wavelength)(mass). I'm fairly certain the main difference between velocity and speed is direction, and I think the only possible thing that could change in your answer is the positive or negative sign. Maybe check the numbers and there might be a miscalculation

[Luis Torres 1C]

Manipulating the DeBroglie wavelength equation can help with solving for velocity

[Chem_Mod]

Another note: velocity is a vector and speed is the magnitude of that velocity vector since it does not indicate direction.