1322 questions and answers in this section
Explain why our fingers wrinkle after a long bath?

Explain why our fingers wrinkle after a long bath?

Our skin is mainly composed of three distinct layers: the epidermis, the dermis, and the hypodermis. The epidermis is the outer layer that protects the...

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Explain why has the city of Crescent City (in the United States) been affected by so many tsunamis?

Explain why has the city of Crescent City (in the United States) been affected by so many tsunamis?

Crescent City is located on the northwestern coast of California, not far from the border with Oregon, directly across from the Pacific. The big issue...

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Explain why trees in windy regions often have inclined trunks?

Explain why trees in windy regions often have inclined trunks?

When a tree is regularly subjected to strong winds, it endures significant mechanical stress. The trunk is constantly strained, bent, and deformed by gusts, generating...

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Explain why bamboo forests grow so quickly?

Explain why bamboo forests grow so quickly?

Bamboos have a unique genetic heritage that allows them to grow at a record speed. Their genome is equipped with numerous genes responsible for very...

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Explain why we squint in bright sunlight to see better?

Explain why we squint in bright sunlight to see better?

When you squint, it is mainly the muscles around the eyelids that come into play, especially the orbicularis oculi muscle. This circular muscle contracts gently...

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Explain why a metal fork can produce a screeching sound on a plate?

Explain why a metal fork can produce a screeching sound on a plate?

The metal fork made of stainless steel is rigid but sufficiently elastic: this means it vibrates easily when excited by friction. It conducts vibrations very...

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Explain why ice cubes stick together in the freezer?

Explain why ice cubes stick together in the freezer?

Even when they appear perfectly solid, ice cubes can slowly lose some of their ice in the form of vapor, without passing through the liquid...

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Explain why some mirrors produce a distorted image?

Explain why some mirrors produce a distorted image?

The way a mirror distorts an image essentially depends on its shape and its curvature. A normal mirror, the one you use every day, is...

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Explain why the foam in a bath eventually disappears after a while?

Explain why the foam in a bath eventually disappears after a while?

The foam you see in your bath is mainly due to the presence of surfactants, molecules found in soap and shower gels. These somewhat special...

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Explain why do tides occur regularly?

Explain why do tides occur regularly?

Tides occur mainly due to the gravitational force exerted by the Moon, and to a lesser extent by the Sun, on the Earth's oceans. As...

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