Guide

1

easiest method - measure the temperature

*mixture***water by any suitable thermometer.Suppose, began to fill the tub or other container, you let too much hot water.Then, discovering his mistake, you immediately cut off valve hot water****and added some cold.How to determine the final temperature****?Stir the water and use any suitable thermometer (eg medical).**

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2

You can also calculate the resulting temperature

*mixture*advance.Suppose you have a volume V1**hot water with a temperature**t1.To it surged some cold water**with the volume V2 and the temperature t2.We need to calculate what the final temperature t will have***mixture*.Heat loss to the environment is negligible. 3

and heat capacity, and density

**water of different temperatures is the same.Consequently, the final temperature will depend on the volume ratio.One can easily understand that in any case the final temperature t is intermediate between t1 and t2, but less than the value V2 compared to V1, the closer to the t is t1, and vice versa.** 4

Final temperature t is calculated by the following formula: t = (t1V1 + t2V2) / (V1 + V2).Substituting into this formula known to you the value of temperature and volume, and performing calculations, you define the desired temperature

*mixture***water**. 5

Of course, your task would be completely solved in the same way, if instead of the volume you have to know the mass of water

**m1 and m2.**** **

Good advice is easy to understand that the same method is all the same temperature of the mixture of fluids, not just water.If we are talking about the temperature of a mixture of different liquids, then the calculation must take into account their specific heats, and this simplified formula can not be applied.