Dark Matter: Unveiling the Invisible Cosmic Enigma

cosmic enigma

In the vast expanse of the universe, there lies a mystery as pervasive as it is elusive: dark matter. This invisible substance makes up about 85% of the universe’s total mass, yet it neither emits nor absorbs light, making it incredibly difficult to detect with traditional astronomical tools. Its existence is inferred from gravitational effects on visible matter, radiation, and …

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Historical Physics Discoveries That Changed the World

physics discoveries changing the world

Introduction Physics, the study of matter, energy, and the fundamental forces that govern the universe, has been a driving force behind numerous technological advancements and a deeper understanding of the world we live in. Throughout history, physicists and scientists have made groundbreaking discoveries that have revolutionized our perception of the cosmos. This article will explore some of the most significant …

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Why Using A Fan Will Make Ice Melt Faster?

Question A fan cools you on a hot day. Yet, why does the same fan warm an ice to make it melt faster? Answer Fans exhibit a dual impact, providing a cooling effect to humans on hot days and simultaneously expediting the melting of ice. Understanding the underlying principles of these phenomena reveals the nuanced interplay between air circulation, temperature, …

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Why an orchestra needs to be warmed up first?

orchestra

Question: If an orchestra doesn’t warm up before a performance, the strings go flat and the wind instruments go sharp during the performance. Why? Answer: The temperature dynamics within an orchestra, particularly the wind and string instruments, play a crucial role in the observed phenomena of strings going flat and wind instruments going sharp when a proper warm-up is neglected. …

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A Monkey Climbing A Rope – What Happens?

ropeclimb

Question: A monkey hangs on one end of a rope which passes over a pulley and is balanced by a weight on the other end; the weight is the same as the weight of the monkey. The monkey decides to climb the rope. What happens next? Answer: As the monkey initiates its climb up the rope, a consequential shift in …

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Why Do Metals Feel Colder Than Plastics In Air-con?

Question: In an air-conditioned room, a metal box and a plastic box both have the same temperature. Yet, why does the metal box feel colder? Answer The perceived difference in temperature between the metal and plastic boxes stems from their distinct thermal conductivity properties. While both materials may possess the same internal temperature, their ability to conduct heat varies significantly, …

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Why must we measuring blood pressure at the arm?

BloodPressure heart

Blood pressure is normally measured with the cuff of the sphygmomanometer around the arm. Suppose the blood pressure were measured with the cuff around the calf of the leg of a standing person. Would the reading of the blood pressure be the same here as it is for the arm? Answer: No, the blood pressure measured at the calf would …

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