Evaporation

This section delves into the process of evaporation, explaining the mechanism at the particle level and factors affecting the rate of evaporation. It connects the concept to kinetic energy and temperature.

Definition: Evaporation is the process by which particles with high kinetic energy escape from the surface of a liquid.

Highlight: The page explains how evaporation leads to a decrease in the average kinetic energy of the remaining particles, resulting in a temperature drop.

Example: Factors affecting evaporation are discussed, including surface area, temperature, and humidity.

Vocabulary: Humidity - The amount of water vapor present in the air, which affects the rate of evaporation.

Energy Stores and Equations

This page introduces the fundamental concepts of energy stores and key GCSE Physics equations. It covers various energy stores such as chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic, and nuclear. The page also presents essential equations for calculating kinetic energy, efficiency, thermal energy, elastic potential energy, electrical energy, and gravitational potential energy.

Vocabulary: Specific heat capacity - The amount of energy required to raise the temperature of 1 kg of a substance by 1°C (J/kg°C).

Example: The page provides an example of energy transfer in a camping stove, where chemical energy from fuel is converted to thermal energy.

Highlight: The efficiency equation is presented as (useful energy output / total energy input) × 100, which is crucial for understanding energy conservation and transfer.