In winter, two thin shirts provide more comfort than one thick shirt because the layer of air trapped between the two shirts acts as an insulating medium. This air layer reduces heat loss from the body, keeping it warmer.
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Food cooks faster in a pressure cooker because the air pressure increases, which increases the boiling point of water. This higher boiling point allows the food to cook at a higher temperature, speeding up the cooking process.
300 K is equal to 27 °C. To convert from Kelvin to Celsius, subtract 273.15 from the temperature in Kelvin. Therefore, 300 K – 273.15 = 26.85 °C, which is approximately 27 °C.
The water remains cold in the pitcher due to the process of evaporation. As water evaporates from the surface of the pitcher, it absorbs heat energy from the surroundings, including the remaining water, cooling it down.
The latent heat of melting of ice is 80 Cal/g. This value represents the amount of heat required to convert 1 gram of ice at its melting point into water without changing its temperature.
The emitted or absorbed heat which changes the state of the substance but does not cause any change in temperature is called latent heat. This energy is used for phase transitions, such as melting or boiling, without altering the substance’s ...
Water on mountains starts boiling at a temperature less than 100°C due to the lower atmospheric pressure at higher altitudes. The reduced pressure decreases the boiling point of water, causing it to boil at temperatures below 100°C.
Due to impurities, the boiling point (B.P) of a liquid increases. This phenomenon is known as boiling point elevation and is a colligative property. The presence of impurities lowers the vapor pressure of the solution, requiring a higher temperature for ...
Running a fan in hot weather gives comfort because our sweat evaporates faster. The moving air increases the evaporation rate of sweat from our skin, which cools the body through the process of evaporative cooling.
The temperature of the Sun’s surface is approximately 6000K. This value refers to the photosphere, the Sun’s outer layer that emits the light we see.