In the set up shown in figure 4, it is observed that the level of the water initially drops before starting to rise.

      

In the set up shown in figure 4, it is observed that the level of the water initially drops before starting to rise.
10waterlevel1136.jpg
Explain the observation.

  

Answers


John
The water level dropped due to expansion of glass that received heat first. The level started rising when the water was finally heated.
johnmulu answered the question on April 15, 2017 at 08:41


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Previous: Figure 2 shows a flask filled with water. The flask is fitted with a cork through which a tube is inserted. When the flask is cooled, the water level rises slightly, and then falls steadily.

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