r. Given the law of conservation of energy, what happens when a 200°C iron bar is placed in thermal contact with a 30°C block of wood? A. Energy leaves the iron bar and enters the wood until the temperatures are equal. B. Energy leaves the wood and enters the iron bar until the temperatures are equal. C. All the energy from the iron bar is transferred to the wood. D. All the energy from the wood is transferred to the iron bar.