Woolen clothes are warmer than cotton clothes because they are good insulators of heat. Wool fibers trap air within their structure, creating a barrier against heat loss. This insulation prevents body heat from escaping, keeping the wearer warm.
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White clothes are cooler than black clothes because they reflect whatever light reaches them. Unlike black clothes, which absorb light and convert it into heat, white clothes reflect most of the light, including infrared radiation, reducing heat absorption and maintaining ...
The morning sun is not as hot as the afternoon sun because in the morning, the sun’s rays have to travel a greater distance in space before reaching the Earth’s surface. Therefore, they are more scattered and less intense, resulting ...
Dark-skinned people from Africa compared to white-skinned people from Britain generally feel more heat. The higher melanin levels in their skin absorb sunlight, leading to increased heat retention. In contrast, lighter-skinned individuals dissipate heat more efficiently.
The most appropriate color combination of umbrellas for protection from the sun is White above and black below. White reflects sunlight and heat, keeping the area beneath the umbrella cooler, while black absorbs heat, preventing it from reaching the user. ...
Clothes keep us warm in winter because they prevent body heat from going out. In cold weather, our bodies generate heat through metabolic processes. Clothing acts as insulation, trapping this heat close to the body and forming a barrier against ...
The part of the sun’s radiation that heats the solar cooker is infrared ray. Infrared radiation carries heat energy and is responsible for warming objects exposed to sunlight. Solar cookers utilize this infrared radiation to heat and cook food, making ...
Mercury is a very good conductor of heat. Mercury, being a metal, exhibits high thermal conductivity due to its densely packed atoms, facilitating efficient heat transfer. Water, ether, and benzene, being organic compounds, have lower thermal conductivity compared to mercury.
The transmission of heat through molecular structure is called conduction. Conduction occurs when heat is transferred through direct contact between molecules, allowing energy to move from one molecule to another.
The best conductor of heat among is sea water. Sea water contains dissolved salts and minerals, which increase its thermal conductivity compared to cold water, hot water, and distilled water.