Q1. An electron is a subatomic particle (m = 9.11 × 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from the initial velocity of +5.40 × 10^5 m/s to a final velocity of +2.10 × 10^6 m/s while travelling a distance of 0.038 m. The electron's acceleration is due to two electric forces parallel to the x axis: and, which points in the -x direction. Find the magnitudes of (a) net force acting on the electron and (b) electric force.

Q2. A 203 rad dose of radiation is administered to a patient in an effort to combat a cancerous growth. Suppose that all of the energy deposited is absorbed by the growth.

(a) Calculate the amount of energy delivered per unit mass.

(b) Assuming the growth has a mass of 0.25 kg and a specific heat equal to that of water, work out its temperature rise.

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