Three liquids are at temperatures of 13 ◦C, 21◦C, and 34◦C, respectively. Equal masses of the first two liquids are mixed, and the equilibrium temperature is 15◦C. Equal masses of the second and third are then mixed, and the equilibrium temperature is 23.8 ◦C. Find the equilibrium temperature when equal masses of the first and third are mixed.
Answer in units of ◦C.

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blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.