13) Fluorine-21 has a half-life of approximately 5 seconds. What fraction of original nuclei would remain...
13) Fluorine-21 has a half-life of approximately 5 seconds. What fraction of original nuclei would remain after 1 minute? (6 points)
Fluorine-21 has a half-life of approximately 5 seconds. What fraction of original nuclei would remain after 1 minute?
14) Photons of energy 6.0 J are incident on a metal. It is found that current flows until a stopping potential of 3.8 V is applied. A) Find the work function. (5 points) B) If the wavelength of incident photons is tripled, what is the maximum kinetic energy of ejected electrons? (5 points)