please shelp me with this

please shelp me with this problemwhat is the stopping potential (V) if the wavelength of the incident light is 400 nm??
1. 2 answers
2. asked by Liz frank
3. 390 views
what is one way that characters relate to plot?a. character shelp drive plot through their words and actions b. characters move
1. 1 answer
2. 30 views