In the diagram, q1, 92, and q3 are in a straight line. Each of these particles has a charge of -2.35 x 10-6 C. Particles qi and q2 are separated by 0.100 m and particles q2 and q3 are separated by 0.100 m. What is the net force on particle q3?​

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Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

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