Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

What is Energy?

What is Energy?

The universe is composed of matter in different forms, and all forms of matter contain energy. The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal (fossilized plants)...

Energy Basics

Energy Basics

Chemical reactions, such as those that occur when you light a match, involve changes in energy as well as matter.

Energy

Energy

The universe is composed of matter in different forms, and all forms of matter contain energy. The different forms of energy on Earth originate from the Sun—the ultimate energy source. For instance, plants capture light energy from the Sun, and through the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal...

Electrical Energy

Electrical Energy

Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules. The...

Energy Carried By Electromagnetic Waves

Energy Carried By Electromagnetic Waves

Anyone who has used a microwave oven knows there is energy in electromagnetic waves. Sometimes, this energy is obvious, such as in the summer sun's warmth. At other times, it is subtle, such as the unfelt energy of gamma rays, which can destroy living cells. Electromagnetic waves bring energy into a system through their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. However, there is energy in an electromagnetic wave,...

Power and Energy

Power and Energy

The power and energy delivered to an element are subjects of great significance in the field of electrical engineering. It is a well-known fact that a 100-watt light bulb emits more light than a 60-watt one. Therefore, power and energy calculations play a crucial role in the analysis of electrical circuits.
Power, defined as the time rate of expending or absorbing energy, is quantified in units called watts (W). The relation between power and energy is mathematically given as

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Critical Appraisal of Paediatric Embryonal Cancers Treated with Image-guided Intensity-modulated Proton Therapy.

Clinical oncology (Royal College of Radiologists (Great Britain))·2023

Same author

Epidermoid cyst of the brain stem : a case report.

Neurology India·2018

Same author

Primary osteosarcoma of the anterior skull base.

Neurology India·2018

Same author

Aortic arch tortuosity with PHACE syndrome - a rare case scenario.

Images in paediatric cardiology·2017

Same author

Prognostic Predictors of Visual Outcome in Open Globe Injury: Emphasis on Facial CT Findings.

AJNR. American journal of neuroradiology·2017

Same author

Carbachol excites sublaterodorsal nucleus neurons projecting to the spinal cord.

The Journal of physiology·2013

Search research articles

Related Experiment Video

Updated: Jul 11, 2026

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Published on: April 2, 2015

Energy for the new millennium.

J Goldemberg¹, T B Johansson, A K Reddy

¹Instituto de Eletrotecnica e Energia Universidade de Sao Paulo Av. Prof. Almeida Prado, 925 Cidade Universitaria 05508-900 Sao Paulo-SP, Brazil. goldemb@iee.usp.br

|January 5, 2002

Summary

The study advocates for an energy approach centered on sustainable development, focusing on end-use services rather than just supply. This shift addresses environmental, security, and equity issues, particularly for the two billion people lacking modern energy access.

More Related Videos

Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves

Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves

Published on: April 10, 2015

Measurement of Energy Metabolism in Explanted Retinal Tissue Using Extracellular Flux Analysis

Measurement of Energy Metabolism in Explanted Retinal Tissue Using Extracellular Flux Analysis

Published on: January 7, 2019

Related Experiment Videos

Last Updated: Jul 11, 2026

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Published on: April 2, 2015

Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves

Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves

Published on: April 10, 2015

Measurement of Energy Metabolism in Explanted Retinal Tissue Using Extracellular Flux Analysis

Measurement of Energy Metabolism in Explanted Retinal Tissue Using Extracellular Flux Analysis

Published on: January 7, 2019

Area of Science:

Energy policy and sustainable development
Environmental science and global challenges
Technological innovation in energy systems

Background:

Traditional energy perspectives focused on supply-side growth, neglecting environmental, security, and equity concerns.
Significant global population lacks access to affordable modern energy, hindering development and quality of life.
Energy consumption is a major driver of environmental issues, including air pollution and global warming.

Purpose of the Study:

To propose an evolved energy perspective prioritizing sustainable development goals.
To highlight the importance of focusing on energy end-uses and the services they provide.
To explore technological and policy solutions for a more equitable and environmentally sound energy future.

Main Methods:

Review of historical energy thinking and its limitations.
Analysis of energy's role in sustainable development, considering economic, social, and environmental factors.
Examination of technological options, case studies (e.g., Brazilian ethanol), and policy strategies for energy systems.

Main Results:

A paradigm shift is needed from supply-centric to end-use-focused energy provision.
Innovative technologies and strategic investments are crucial for sustainable energy transitions.
Developing countries can potentially 'leap-frog' to advanced, sustainable energy solutions.

Conclusions:

Energy provision must actively support sustainable development, addressing access, environment, and equity.
Technological innovation and foreign direct investment are key enablers for developing nations.
Policy frameworks are essential to align energy systems with sustainable development objectives.