The temperature of iced water after 30 minutes can vary depending on several factors, including the initial temperature of the water, the amount of ice present, the ambient temperature, and the insulating properties of the container holding the water.
Assuming that the iced water starts at a temperature close to 0 degrees Celsius (the freezing point of water) and is in a well-insulated container, we can expect the temperature to remain near 0 degrees Celsius even after 30 minutes. This is because the ice present in the water will absorb heat from the surroundings and gradually melt, but the temperature will remain close to the freezing point until all the ice has melted.
However, if the ambient temperature is higher than 0 degrees Celsius, the water may warm up slightly due to heat transfer from the surroundings. The rate of warming will depend on factors such as the initial temperature, the ambient temperature, and the specific heat capacity of the water.
To obtain a more accurate estimate of the temperature after 30 minutes, it would be helpful to know the initial temperature of the water, the amount of ice present, and the environmental conditions.