DeBroglie Equation Post Assessment

[gabbym]

At what velocity is an electron moving if it has a de Broglie wavelength of 7.0 × 10-11 m? Can someone help me with this problem?

[A De Castro 14B 2H]

With this problem, use the deBroglie Equation: λ = h/p, where p is momentum = mass_electron * velocity. You can rearrange the equation to calculate the velocity: v = h/(λ * mass_electron)

[Samantha Man 1L]

By plugging in your given wavelength, the mass of an electron (9.11E-31kg), and Planck's constant, you can solve for the velocity.

[Jonas Talandis]

Hi,

Using the De Broglie equation (Wavelength = h/m*v), we can insert the given wavelength, the Planck constant, and the known mass of an electron, which is given on the test btw, to solve for v. Hope that helps.