145 questions and answers in this section

Natural Sciences » Chemistry

Explain why a candle flame is cone-shaped?

Explain why a candle flame is cone-shaped?

A candle flame is composed of three distinct zones: the core, the luminous zone, and the outer shell. The core of the flame is the...

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Explain why some fireworks shine in color and others do not?

Explain why some fireworks shine in color and others do not?

Fireworks produce light through an exothermic chemical reaction called combustion. When the fireworks are ignited, the chemical components inside react violently and release energy in...

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Explain why colors change when mixing paint?

Explain why colors change when mixing paint?

The pigments present in paint are substances that absorb certain colors of light while reflecting others. When white light hits them, pigments absorb certain wavelengths...

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Explain why a soap bubble bursts?

Explain why a soap bubble bursts?

A soap bubble is mainly composed of water, detergent, and air. Water makes up the liquid inside the bubble, while the detergent helps reduce the...

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Explain why can radioactive cells glow in the dark?

Explain why can radioactive cells glow in the dark?

Why do radioactive cells glow? Radioactive cells can glow in the dark due to the phenomenon of radioactive luminescence. This process is related to the...

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Explain why hot water freezes faster than cold water?

Explain why hot water freezes faster than cold water?

The Mpemba paradox is named after Erasto Mpemba, a Tanzanian student who first observed this phenomenon in 1963. He noticed that under certain conditions, hot...

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Explain why some foods sting or burn the tongue?

Explain why some foods sting or burn the tongue?

Peppers are foods that cause a burning sensation on the tongue and in the mouth. This sensation is due to the presence of capsaicin, a...

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Explain why glass can break under sudden pressure?

Explain why glass can break under sudden pressure?

Glass is a solid, amorphous and transparent material, mainly composed of silicon dioxide (SiO2) and other additives that give it specific properties. Its molecular structure...

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Explain why did Marie Curie use red notebooks for her research?

Explain why did Marie Curie use red notebooks for her research?

Marie Curie, born Maria Skłodowska in 1867 in Warsaw, Poland, showed exceptional aptitude for science at an early age. Raised in an academic environment, she...

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Explain why does water bubble when it boils?

Explain why does water bubble when it boils?

The formation of steam bubbles during the boiling of water is a fascinating phenomenon and essential to understand. When the water temperature reaches its boiling...

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