Multiple choice

One liter of water at 30oC is mixed with one liter of water at 50oC. The temperature of the mixture will be

  1. 80oC

  2. More than 50o C

  3. 20o C

  4. Between 30o C and 50o C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When two equal volumes of water at different temperatures are mixed, the final temperature is the arithmetic mean of the two temperatures. The average of 30 and 50 is 40, which falls between 30 and 50.

AI explanation

When two equal volumes of water at different temperatures are mixed, the final temperature is the arithmetic mean of the two starting temperatures. The average of 30 degrees C and 50 degrees C is 40 degrees C. Therefore, the temperature of the mixture must be between 30 degrees C and 50 degrees C.

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