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Physics, 26.11.2019 19:31 fionaaaa

Radiation with a wavelength of 238 nm shines on a metal surface and ejects electrons that have a maximum speed of 3.75 × 105 m/s. which one of the following metals is it, the values in parentheses being the work functions: potassium (2.24 ev), calcium (2.71 ev), uranium (3.63 ev), aluminum (4.08 ev), or gold (4.82 ev)?

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