A 0.390 kg iron horseshoe that is initially at 745 degc is, Ask an Expert

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Q1. A railroad freight car weighing 290 kN and travelling at 1.52 m/s overtakes one weighing 206 kN and travelling at 0.920 m/s in the same direction. The cars couple together. What is the speed of the cars after collision?

Q2. A 0.390 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? Overlook any heat transfer to or from the surroundings.

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