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[" 14.The threshold frequency vo for a m...

[" 14.The threshold frequency vo for a metal is "7.0times10^(14)s^(-1)" calculate the kinetic energy of an electron emitted "],[" when radiation of frequency "v=1.0times10^(15)times10^(-1)],[[" (A) "1.98times10^(-19)," (B) "2.98times10^(-13)," (C) "3.20times10^(-20)," (D) "1.0times10^(-10)]]

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