An alpha particle (system of two neutrons and two protons) is stationary in a vacuum, when a proton is released from rest a distance di = 0.75nm away. The proton then accelerates from di to df which is a distance df = 5.5nm away from the alpha particle. a) What is the potential difference between df and di? b) What is the protons speed when it is at df ?

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.