152 questions and answers in this section

Natural Sciences » Physics

Explain why airplanes fly in the air?

Explain why airplanes fly in the air?

Lift is the aerodynamic force that keeps an aircraft in the air. It is generated by the pressure difference between the intrados (lower surface of...

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Explain why bread rises during baking in the oven?

Explain why bread rises during baking in the oven?

Yeast is a unicellular microorganism that has been used for millennia to leaven bread dough. When rehydrated and fed with sugars present in the flour, yeast starts...

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Explain why traffic lights are red, orange, and green.

Explain why traffic lights are red, orange, and green.

Traffic lights use a visual signaling system to regulate road traffic. These systems control the flow of vehicles in an orderly and safe manner, thus...

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Explain why hot objects appear to twinkle in the distance?

Explain why hot objects appear to twinkle in the distance?

Atmospheric disturbance can play an important role in the flickering of hot objects observed from a distance. When light from these objects passes through different...

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Explain why glass is transparent to visible light?

Explain why glass is transparent to visible light?

When incident light comes into contact with a material, it interacts with the electrons present in the material. The polarization of electrons is a phenomenon...

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Explain why some people are left-handed?

Explain why some people are left-handed?

Scientific research has shown that handedness, that is being right-handed or left-handed, is partly influenced by genetic factors. Studies conducted on twins have shown a...

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Explain why compasses point north?

Explain why compasses point north?

The magnetic North Pole and the geographic North Pole are not located in the same place on our planet. The geographic North Pole is the...

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Explain why honey is sweet?

Explain why honey is sweet?

Honey is sweet due to its particular chemical composition which contains a large amount of sugars, mainly glucose and fructose. These two simple sugars are...

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Explain why plants need light to live?

Explain why plants need light to live?

Photosynthetic pigments are compounds found in plants and other photosynthetic organisms that capture the light energy needed for photosynthesis. The main photosynthetic pigments in plants...

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Explain why some planes fly faster than others?

Explain why some planes fly faster than others?

The speed performance of an aircraft largely depends on the power of its engines. The power of an aircraft's engines is essential to provide the...

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