Heat flows from hot iron to cool wood to reach thermal equilibrium.
When a 200°C iron bar is placed in thermal contact with a 30°C block of wood, energy leaves the iron bar and enters the wood until the temperatures are equal. According to the law of conservation of energy, heat flows from the hotter object (iron bar) to the cooler object (wood) until thermal equilibrium is reached. This transfer of energy is a demonstration of the concept of heat flowing from high temperature to low temperature.
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