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Q1. A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings.

Q2. The length of a simple pendulum is 0.65 m, the pendulum bob has a mass of 255 g, and it is released at an angle of 16° to the vertical. (a) With what frequency does it oscillate? (b) What is the pendulum bob's speed while it passes through the lowest point of the swing? Assume SHM. (c) What is the total energy stored in this oscillation assume no losses?

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