A Centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature registers 140°. What is the fall in temperature registered by the centigrade thermometer?

A thermometer is an instrument used to measure temperature. It operates on the principle that the physical properties of materials change with temperature. Common types include mercury thermometers, alcohol thermometers, and digital thermometers. They are used in various fields such as medicine, weather monitoring, and industrial applications.

Class 11 Physics Chapter 10 Thermal Properties of Matter focuses on understanding heat transfer through conduction convection and radiation. It covers topics like specific heat capacity thermal expansion and the laws of thermodynamics. The chapter explains the behavior of gases liquids and solids under varying temperatures and the relationship between temperature and energy transfer in different materials.