On cold days, the iron block feels colder than the wooden block because iron has higher thermal conductivity than wood. Thermal conductivity refers to a material’s ability to conduct heat. Iron quickly conducts heat away from the skin, giving a ...
Tiwari Academy Discussion Latest Questions
Water in an electric kettle gets heated primarily due to conduction. The heating element transfers thermal energy directly to the water molecules upon contact. While convection and radiation may contribute minimally, the main mechanism responsible for heating water in an ...
The Sun’s heat reaches the Earth primarily through radiation. Radiation involves the transfer of heat energy through electromagnetic waves, such as light and infrared radiation, traveling through the vacuum of space.
In the method of heat transfer known as radiation, a medium is not necessary. Radiation involves the transfer of heat energy through electromagnetic waves, such as light and infrared radiation, that can travel through a vacuum, such as space. Unlike ...
The method of heat transmission in which the particles of the medium do not move is conduction. Conduction involves the transfer of heat through direct contact between particles in a material medium.
The best conductor of heat among the options provided is mercury. Mercury is a metal with high thermal conductivity, efficiently transferring heat. In contrast, water, wood, and leather are poor conductors of heat.
The thermal conductivity of silver is greater than that of copper. Silver has a thermal conductivity of approximately 429 watts per meter Kelvin (W/mK), while copper’s thermal conductivity is about 401 W/mK.
A bolometer measures thermal radiation. It detects and quantifies infrared or heat radiation emitted by objects. By monitoring changes in electrical resistance when exposed to thermal radiation, bolometers determine radiation intensity. They are essential in various fields for precise measurement ...
The boiling point of water decreases with increasing altitude. Mussoorie is at a higher altitude than Delhi. Therefore, the boiling point of water in Mussoorie will be less than 100°C.
The normal temperature of a human body is approximately 37 degrees Celsius (°C) when measured orally. This temperature serves as a baseline for assessing an individual’s health. It can vary slightly depending on factors such as age, time of day, ...