98 questions and answers in this section
Explain why air quality in the mountains can impact athletes' performance at high altitudes.

Explain why air quality in the mountains can impact athletes' performance at high altitudes.

When the human body is exposed to high altitude, several effects occur. The decrease in atmospheric pressure and the reduction in oxygen concentration are the...

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Explain why the wind can extinguish a flame but fuel a fire.

Explain why the wind can extinguish a flame but fuel a fire.

A strong wind can extinguish a flame by causing a faster cooling of the fuel and by pushing away the hot air needed for combustion. When the...

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Explain why the Epupa Falls are important to the residents.

Explain why the Epupa Falls are important to the residents.

The Epupa Falls, located along the Kunene River at the border between Namibia and Angola, represent a site of great cultural and heritage importance for...

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Explain why the sea is blue?

Explain why the sea is blue?

When sunlight enters the water, it is bent, causing refraction. The wavelength of blue light is shorter than that of other colors, allowing it to...

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Explain why do penguins swim so quickly underwater despite their clumsy appearance on land?

Explain why do penguins swim so quickly underwater despite their clumsy appearance on land?

Penguins are marine birds that have a morphology adapted to aquatic life. Their streamlined and aerodynamic body is covered with dense feathers that act as...

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Explain why brisk walking is a good way to improve cardiovascular health.

Explain why brisk walking is a good way to improve cardiovascular health.

Fast walking is beneficial for cardiovascular health because it is a moderate-intensity exercise that allows to progressively increase heart rate. By engaging the muscles consistently, fast walking...

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Explain why seahorses so often coil around marine objects.

Explain why seahorses so often coil around marine objects.

Seahorses are fascinating marine creatures in many ways. Their delicate appearance and small size make them fragile and vulnerable beings in the vast ocean. These...

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Explain why a tennis ball bounces higher in hot weather than in cold weather?

Explain why a tennis ball bounces higher in hot weather than in cold weather?

The temperature of the air and the surface of the ground plays a crucial role in how a tennis ball bounces. Indeed, when the temperature...

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Explain why Japanese samurais carried katanas as their main weapon.

Explain why Japanese samurais carried katanas as their main weapon.

Japanese samurais used katanas as their main weapon due to their formidable efficiency in close combat. Katanas were single-edged, sharp and curved swords, typically measuring...

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Explain why the presence of elastane in sports clothing promotes athletes' freedom of movement.

Explain why the presence of elastane in sports clothing promotes athletes' freedom of movement.

Elastane, also known as Spandex or Lycra, is a stretchy synthetic fiber widely used in the textile industry. Its main characteristic lies in its exceptional...

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