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Mitchell Richardson posted the thread Finding force between solenoid and magnet in Introductory Physics Homework Help.$$\mu = 4\pi \times 10^{-7}$$ $$n = \frac{180}{0.135} = 1333.33$$ $$I = 1.85$$ $$L = 22.619$$ $$r = 0.014$$ $$F= \frac{\mu \times...