A black body can absorb radiation from all wavelengths. As a theoretical concept, a black body absorbs all radiation incident upon it, regardless of the wavelength. This characteristic makes it an ideal absorber and emitter of radiation, which forms the ...
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During the winter season, we feel colder due to clear weather. Clear skies allow more heat to radiate away from the Earth’s surface into space, resulting in colder temperatures at ground level. This lack of cloud cover reduces the insulation ...
Absolute humidity is expressed in grams per cubic meter of air. Absolute humidity refers to the actual amount of water vapor present in a given volume of air and is typically measured in grams per cubic meter (g/m³), making option ...
The first law of thermodynamics, also known as the law of energy conservation, protects energy. It states that energy cannot be created or destroyed, only transformed from one form to another.
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 ...
Mercury is generally used in thermometers because it has high density. Its high density allows for precise and easily readable measurements due to the small size of the thermometer’s scale. Additionally, mercury’s low freezing point and wide liquid range make ...
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 function of a thermostat in a refrigerator is to maintain the same temperature. It regulates the cooling system, turning it on and off to ensure the internal temperature stays within a set range, thus preserving food at a consistent ...
It snows on high hills because the temperature is lower than the freezing point, causing water vapor to freeze and turn into ice. As air rises over the hills, it cools, and if the temperature drops below freezing, the water ...
The boiling point of water depends on the pressure above the open surface of water. As pressure increases, the boiling point rises, and as pressure decreases, the boiling point lowers.