Refer to the image attached. Answer the problem within the red box by using the example steps above the red box.:

Photoelectric Effect - An electron with v=705km/s is released from zinc due to incident light. What is: the kinetic energy of the electron, the wavelength of the incident light given the work function of zinc is 3.63eV, and longest wavelength of light which will liberate an electron from zinc. - Calculate the kinetic energy of the electron to get the answer to the first part KE=21mv2=21(9.1091031)(7.05105)22.261019J Use kinetic energy and the photoelectric effect to answer the second part -hv=+KE=(3.63eV1eV1.6021019J)+(2.26371019J)8.081019J-6.6261034Js8.078961019J1.21931015s1-=vc=1.21931015s13.00108sm2.46107mor246nm - Finally, use the definition of the work function to solve the last part =hv0=h(0c),so0=hc=5.81510196.6261034.001083.418107342nm Find the wavelength of light needed to eject electrons at 785km/s from zinc