The process of making camphor vapor from solid camphor is called sublimation. Sublimation is the direct transition of a substance from its solid phase to its gas phase without passing through the liquid phase. When solid camphor is heated, it ...
Tiwari Academy Discussion Latest Questions
Dew is not formed on a strong windy night because the rate of evaporation is fast. The movement of air removes the thin layer of moisture near the ground, preventing dew formation.
It takes more time to cook potatoes on mountain tops because atmospheric pressure is low. At higher altitudes, the reduced atmospheric pressure lowers the boiling point of water, causing water to boil at temperatures lower than at sea level. This ...
The reason why snow covered on mountains does not melt simultaneously due to the heat of the Sun is because it reflects most of the heat received from the Sun. The reflective properties of snow prevent it from absorbing much ...
The time taken for the hot water to cool from 80°C to 70°C will be more than 10 minutes. As the temperature difference decreases, the rate of cooling also decreases according to Newton’s law of cooling. Therefore, it will take ...
Newton’s cooling law is applicable only when the difference in temperature is not very much. This law describes the rate of cooling of an object relative to the temperature difference between the object and its surroundings, assuming a small temperature ...
The law stating that the rate of cooling of an object is directly proportional to the temperature difference between the object and the medium around it is known as Newton’s law of cooling. This principle, formulated by Sir Isaac Newton, ...
The law stating that good emitters are good absorbers is known as Kirchhoff’s law. This principle explains that materials that efficiently emit radiation at a particular wavelength also absorb radiation at the same wavelength. It is a fundamental concept in ...
The presence of humidity in the atmosphere is ensured by observing water drops on the outer surface of a steel glass filled with hot water. The warmth of the hot water causes moisture in the air to condense on the ...
Hot air produces more flame compared to boiling water, steam, or sun rays. When air is heated to high temperatures, it expands, becoming less dense and rising. This convection process creates a flame when combined with a fuel source.