What Is Energy Efficiency?

Updated on 08.26.2024

2 min read

Middle School High School
Physics - chemistry

Your washing machine, electric bulbs and heating can have varying levels of . The energy efficiency of a machine or system is the relationship between the useful energy given out and the energy consumed.

Our most popular content

See all
Article

Energy in All Its Forms

Elementary Middle School
Article

How Does a Photovoltaic Cell Work ?

High School
Article
Offshore oil and gas production has boomed since the start of the century.

Fossil Fuels

High School
Article
Electricity is used in a wide variety of areas including industry, housing and transportation, such as here for a tram in the city of Toulouse.

Electricity Generation and CO2 Emissions

High School
Article

How Is Coal Formed – A Process Spanning Eras

High School
Article

The Life Cycle of Oil and Gas Fields

High School
Article
Image of a lithium-ion battery from the Toyota Prius hybrid car.

How Do Lithium-Ion Batteries Work?

High School
Article

What Is the Energy Mix?

Middle School
Article

Hydrogen Production

High School
Article

The Three Stages of Refining

High School
Game
Game starting screen

Les Incollables® - Quiz on the Energy

Elementary Middle School
Article
A "house of the future" at the Solar Decathlon Europe 2014 in Versailles, France.

Energy, Ever-Present in Our Daily Lives

High School