(Solved): Need help finding D and C Potassium and gold cathodes are used in a The threshold frequency. photoe ...

Need help finding D and C

Potassium and gold cathodes are used in a The threshold frequency. photoelectric-effect experiment. For each cathode, Enter your answers in hertz separated by a comma. find the following quantities. $f_{0_{\text{potassium }}},f_{0_{\text{gold }}}=5.56\times 10^{14},1.23\times 10^{15}\mathrm{Hz}$ Part B The threshold wavelength. Enter your answers in nanometers separated by a comma. The maximum photoelectron ejection speed if the light has a wavelength of $240\mathrm{nm}$. Enter your answers in meters per second separated by a comma. Part D The stopping potential in volts if the wavelength is $240\mathrm{nm}$. Enter your answers in volts separated by a comma.