An iron ball at 49 °C is dropped in a beaker containing water at 409.19 K. Identify the correct statement regarding the heat flow.

Answer: A. The heat will flow from the water to the iron ball.

The temperature of the iron ball is 49 °C. The temperature of the water is 409.19 K, which equals 136.04 °C (since K = °C + 273.15). Heat always flows from a body at a higher temperature to one at a lower temperature. Therefore, heat will flow from the hotter water to the cooler iron ball.

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