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[" 25.A particle of mass "1" mg has the ...

[" 25.A particle of mass "1" mg has the same "],[" wavelength as an electron moving with "],[" velocity of "3times10^(6)ms^(-1)" .The velocity "],[" particle is (mass of electron "],[=9.1times10^(-31)kg" ) "],[[" (a) "2.7times10^(-18)ms^(-1)," (b) "9times10^(-2)ms^(-1)],[" (c) "3times10^(-31)ms^(-1)," (d) "2.7times10^(-21)ms^(-1)]],[" (c) "3times10^(-31)ms^(-1)," (d) "2.7times10^(-21)ms^(-1)]

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