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![3. A proton moving at 3 x 10 m/s is projected at an angle of 30° above a horizontal plane. If an electric
field of 400 N/C is directed downwards, how long does it take the proton to return to the horizontal
plane? (Ignore gravity.) [mProton = 1.67 x 10-27 kg. Proton +1.6x 10¹ C.] 7.8 x 10's
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Transcribed Image Text:3. A proton moving at 3 x 10 m/s is projected at an angle of 30° above a horizontal plane. If an electric
field of 400 N/C is directed downwards, how long does it take the proton to return to the horizontal
plane? (Ignore gravity.) [mProton = 1.67 x 10-27 kg. Proton +1.6x 10¹ C.] 7.8 x 10's
=
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