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Solve the all parts of given problem:
Problem: In an experiment, 230 g of aluminum (with a specific heat of 900 J/kg • K) at 100°C is mixed with 48.0 g of water (4186 J/kg•K) at 20°C, with the mixture thermally isolated.
Part A: What is the equilibrium temperature?
Part B: What is the entropy change of the aluminum? (Enter your answer to at least three significant figures.)
Part C: What is the entropy change of the water? (Enter your answer to at least three significant figures.)
Part D: What is the entropy change of the aluminum-water system?
Can someone please explain what the heck is going on?
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Two particles are fixed to an x axis: particle 1 of charge q1 = +2.1 10-8 C at x = 20 cm and particle 2 of charge q2 = -4.00q1 at x = 70 cm. At what coordinate on the axis is the net electric field produced by particles equal to zero.
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