An increase in the temperature of an object means that the thermal energy has increased. This is because temperature is a measure of the average kinetic energy of the molecules, and an increase in temperature corresponds to an increase in ...
Category: Class 10 Science
NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021
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When an object is cooled, the energy of its molecules decreases. Cooling reduces the thermal energy of the molecules, causing them to move more slowly.
Heat is a type of energy that can be converted into work. Count Rumford (Benjamin Thompson) first gave direct evidence of this through his experiments on the boring of cannons, which demonstrated the mechanical equivalent of heat.
The scientist who first melted two pieces of ice by rubbing them together was Sir Humphry Davy. He demonstrated that friction could generate heat, which melted the ice.
When some water is churned continuously, its temperature increases. In this process, mechanical energy is converted into thermal energy due to the work done on the water, which raises its temperature.