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1. A particle (charge 7.5x10^(-6)C)is released from rest at a point on the x-axis, x=0.1m. It begins to move due to the presence of a 2.0x10^(-6)C charge which remains fixed at the origin. What is the kinetic energy of the particle at the instant it passes the point x=1.0m?

2. A charge of uniform density (0.80 nC/m) is distributed along the x-axis from the origin to the point x=0.1m. What is the electric potential (relative to zero at infinity) at a point x=0.18m, on the a-axis?