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A proton with the mass m is projected into a uniform electric field that points vertically upward and has magnitude E. The initial velocity of the proton has a magnitude v_0 and is directed at an angle \alpha below the horizontal. A)Find the numerical value of d if E = 500 N/c, v_o= 4.60*10^4, alpha= 40 The equation is 2mv_0^2 sin(alpha)cos(alpha)/eE But M is not given.

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