Adding ice cubes to boiling water will cause the ice cubes to melt faster compared to using room temperature or cold tap water. The reason for this is that the boiling water has a higher temperature than room temperature or cold tap water, which increases the rate of heat transfer. The ice cubes will experience a greater temperature difference when placed in boiling water, leading to a faster transfer of heat from the water to the ice.
The melting of ice occurs when heat energy is transferred from the surroundings to the ice, causing it to change from a solid to a liquid state. In the case of boiling water, the higher temperature of the water results in a more rapid transfer of heat to the ice cubes, accelerating their melting process.
On the other hand, using room temperature or cold tap water would provide a lower temperature difference between the water and the ice cubes. Consequently, the rate of heat transfer would be slower, leading to a slower melting of the ice cubes.
It's worth noting that the presence of ice cubes will also lower the temperature of the water, potentially causing it to cool down over time. However, initially, the boiling water will melt the ice cubes at a faster rate due to the higher temperature.