1295 questions and answers in this section
Explain why pasteurized milk lasts longer than raw milk.

Explain why pasteurized milk lasts longer than raw milk.

Pasteurization is a simple thermal treatment that allows, by rapidly heating milk to a temperature generally between 72°C and 85°C for a few seconds, to...

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Explain why do heatwaves affect electricity?

Explain why do heatwaves affect electricity?

Heatwaves often create imbalances in the electrical grid. When electricity demand surges due to intensive use of air conditioning, the grid is put under significant...

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Explain why it is said that the weather is heavy before a summer thunderstorm?

Explain why it is said that the weather is "heavy" before a summer thunderstorm?

That somewhat oppressive sensation of heaviness before a storm mainly comes from the hot, humid, and still air surrounding us. In fact, our body regulates...

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Explain why we blow on hot soup to cool it down?

Explain why we blow on hot soup to cool it down?

Heat spontaneously flows from a hot medium to a colder one: this is the basic rule of heat transfer. In your hot soup, the fast...

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Explain why are reflections on the surface of water inverted compared to reality?

Explain why are reflections on the surface of water inverted compared to reality?

When you observe a reflection on the water, what you see is the light bouncing off the surface. The principle is simple: each ray of...

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Explain why some volcanoes form underwater?

Explain why some volcanoes form underwater?

Beneath the oceans, the Earth's crust is not fixed but divided into immense pieces called tectonic plates. These plates move slowly, sometimes pulling apart and...

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Explain why can some lakes transform into lava lakes?

Explain why can some lakes transform into "lava lakes"?

Some volcanoes have a magma chamber directly connected to the surface. When the magma rises, it can form permanent pools, called lava lakes, directly visible...

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Explain why do some mountains have snowy peaks all year round?

Explain why do some mountains have snowy peaks all year round?

The local climate plays a key role in ensuring that certain mountains remain snow-covered year-round. For example, near coastal regions, the significant humidity from the...

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Explain why can the length of days vary depending on the year?

Explain why can the length of days vary depending on the year?

The Earth moves through space with a slightly tilted axis (about 23.5 degrees relative to its orbit). This detail is not trivial; it is even...

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Explain why is the lava from Hawaiian volcanoes so fluid?

Explain why is the lava from Hawaiian volcanoes so fluid?

Hawaiian lavas are primarily composed of basalt, a volcanic rock rich in iron and magnesium, but very low in silica. The key point is this...

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