q 34

[805373590]

how do we determine is our answer is reasonable in "If an electron (mass 9.11 x 10-31 kg) has an associated wavelength of 7.28 x 10-9 m, what is its speed? Is your answer reasonable, why?'

[Alice Chang 2H]

Not sure if this is right, but from what I've found online, electrons can only move about 1% of the speed of light. The question's answer is around 4.12 x 10^16 m/s for the electron's speed, which is way faster than light (assuming I did the calculations correctly). So, I assume that this is unreasonable. Hope this helps somehow!