Science Brain Teaser: Which Magnet Will Rise Faster?

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Let’s look at the science puzzle in this picture. You have to say which magnet will rise faster. You will see two glass jars on a table. Jar A is filled with cold water. Jar B is filled with hot water. Both jars have a U-shaped magnet at the bottom. It also has a ring magnet hanging from the top.

The question asks which magnet will rise faster. Let’s break down the science to find the right answer. Think logically to find the math tricks and solve quickly. We are creating and sharing various fun, logical picture puzzles for smart people.

Correct Answer: B (Hot water)

Explanation:

The magnet is being pulled upward by the metal piece above the water. The water only resists the magnet’s motion.

Hot water has lower viscosity than cold water.
Lower viscosity means less drag (resistance) on the moving magnet.
Therefore, the magnet in hot water rises faster.

Science note: If the magnet itself were heated to a high temperature, its magnetic strength would decrease. But in this puzzle, the magnet is only submerged in hot water (far below its Curie temperature), so the reduced water resistance is the dominant effect.

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