Experiment of December 7, 2024:

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Solution video:

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Experiment:

Question:

What happens, when he puts balloons over both bottles?

A) The balloon in the warm bottle rises, the one in the cold bottle is pulled into the bottle.

B) Both balloons remain unchanged.

C) The balloon in the cold bottle rises, the one in the warm bottle is pulled into the bottle.

D) The balloon in the cold bottle remains unchanged, the one in the warm bottle is pulled into the bottle.

Advice of the day:

By "cold" water, we mean, as shown in the film, water from the tap or at room temperature, not from the refrigerator.