Assertion (A): A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter, the copper piece appears hotter than the glass piece. Reason (R): The density of copper is more than that of glass.Codes:
✓ Correct answer: b) Both A and R are true but R is not a correct explanation of A
ExplanationThermal conductivity is a property of a material that indicates its ability to conduct heat.It is defined as the amount of heat that passes through a unit area of a material over a unit of time, when there is a temperature difference across the material.Assertion (A) is true: When copper and glass are heated to the same temperature, copper feels hotter to the touch because it has a much higher thermal conductivity than glass.Copper transfers heat to your skin more quickly than glass which makes it feel hotter.Reason (R) is true: While it is true that copper has a higher density than glass, the reason copper feels hotter is due to its thermal conductivity, not its density.R is Not a Correct Explanation of A: The reason (R) correctly states that copper is denser than glass, but density alone does not determine how hot an object feels to the touch.The primary factor is thermal conductivity, which determines how quickly heat is transferred from the object to your skin.Directions: The following item consist of two statements, one labeled as the Assertion (A) and the other as Reason
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