Assuming that the smallest measurable wavelength in an experiment is 0.330 fm (femtometers), what is the maximum mass of an object traveling at 157 m·s^–1 for which the de Broglie wavelength is observable?


mass = ? kg

I know the formula but I don't know how to solve it. Can some help me?

Didn't I do that for you. What exactly (be specific) do you not understand. Copy and what I answered and show what you don't understand.