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Platinum has a work purpose of 6.4 eV. Radiation by wavelength 150 nm and intensity 1.3 W/m2 is directed at a platinum surface. (a) Discover the maximum kinetic energy of the ejected electrons. (b) If 1.0% of the photons striking a1.0 cm2 area of platinum eject electrons, how many electrons are emitted per second from that part of the surface?

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