Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact

Answer

**Step-by-Step Solution:**

1. **Understanding Heat Transfer**: Heat transfer occurs when two bodies at different temperatures come into contact. The body with a higher temperature will transfer heat to the body with a lower temperature until thermal equilibrium is reached.

2. **Example of Ice and Body**: Consider an example where ice is placed on a body that has been injured. The ice is at a lower temperature compared to the body.

3. **Heat Flow**: When the ice comes into contact with the body, heat from the body (which is at a higher temperature) flows into the ice (which is at a lower temperature). This is because heat naturally moves from warmer areas to cooler areas.

4. **Effect on Ice**: As heat flows from the body to the ice, the temperature of the ice begins to rise. This means that the ice absorbs heat, causing it to melt and eventually reach the same temperature as the body.

5. **Equilibrium**: The process continues until both the ice and the body reach thermal equilibrium, meaning they are at the same temperature. At this point, heat transfer stops.

6. **Conclusion**: Therefore, heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact, until they reach the same temperature.

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