1273 questions and answers in this section
Explain why soap bubbles are round.

Explain why soap bubbles are round.

Surface tension is the force acting at the surface of a liquid, resulting from interactions between molecules at the surface of the liquid. This force...

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Explain why oceanic abysses remain largely unexplored?

Explain why oceanic abysses remain largely unexplored?

The oceanic abysses, located at extreme depths of up to more than 10,000 meters, are subjected to extremely high pressures. At such depths, the water...

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Explain why wireless charging works through surfaces ?

Explain why wireless charging works through surfaces ?

When an electromagnetic wave propagates through space, its electric and magnetic fields oscillate in planes perpendicular to each other. The direction in which the electric...

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Explain why spiders can walk on walls and ceilings?

Explain why spiders can walk on walls and ceilings?

Spiders have hairs and hooks on their legs, which allow them to walk on vertical surfaces like walls and ceilings. The hairs, called setae, are...

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Explain why some deserts have crescent-shaped dunes.

Explain why some deserts have crescent-shaped dunes.

The crescent-shaped dunes, called barkhanes, mainly appear where a wind predominantly blows from a single direction. This dominant wind pushes the sand up the gentle...

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Explain why water freezes more quickly when salt is added to it?

Explain why water freezes more quickly when salt is added to it?

Salt lowers the freezing point of water, which means that the water must be cooled to a lower temperature to freeze. By adding salt to...

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Explain why carbon dioxide is responsible for ocean acidification.

Explain why carbon dioxide is responsible for ocean acidification.

The increase in carbon dioxide in the atmosphere is the primary reason why the oceans are becoming more acidic. This phenomenon is mainly due to...

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Explain why certain plant species are phosphorescent at night.

Explain why certain plant species are phosphorescent at night.

Bioluminescence is a fascinating natural phenomenon found in certain living species, including plants, fungi, insects, and marine organisms. This ability to emit light results from...

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Explain why some lakes disappear and reappear cyclically?

Explain why some lakes disappear and reappear cyclically?

Drought periods are one of the main factors contributing to the cyclical disappearance of certain lakes around the world. When a region undergoes prolonged drought, precipitation decreases...

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Explain why bicycle tires are filled with air?

Explain why bicycle tires are filled with air?

Bicycle tires need to be filled with air for several reasons. First, the air trapped inside the tire creates internal pressure that allows the tire...

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