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7. In a cyclotrou, a He nucleus (4 times as massive as a proton, charge twice the elementary charge) is accelerated through a total potential difference of 20 million Volt. Assuming that the particle starts from rest (a) What is its final kinetic energy, in MeV and in J? (b) What is its final velocity?

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Electran voli electhon qain alter bei accelerated b volt 이 electric, ev is equal to work clone on au electhun n acceleva Hin it th rouqh te. tial dilerence o Ivolt 2- → Now initially, a+ rest. , so 2. K. lina 20 Mere ev is electron vo l+ うNow Conve rting 1+ to ttev. divident by lof 1o6 Con verting rt to Joules. →Jow 12. 2 916 x 1o

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