-
Energy Conservation | National Geographic
Renewable energy technologies have come a long way. But public attitudes lag far behind.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
Get More National Geographic:
Official Site: http://bit.ly/NatGeoOfficialSite
Facebook: http://bit.ly/FBNatGeo
Twitter: http://bit.ly/NatGeoTwitter
Instagram: http://bit.ly/NatGeoInsta
Energy Conservation | National Geographic
https://youtu.be/KlG0xk93J-E
National Geographic
https://www.youtube.com/natgeo
published: 06 Apr 2009
-
GCSE Physics - Conservation of Energy #4
This video covers:
- Conservation of energy principle
- Open vs closes systems
- Examples of how energy is transferred
General info:
- Suitable for all GCSE and IGCSE courses
Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Everything is relevant to your course!
published: 18 Jun 2019
-
Conservation of Energy - Best demonstration Ever !!
Professor walter lewin demonstrates the law of conservation of energy using a swinging pendulum bob.
If the pendulum is released with zero speed, it can never rise above the initial point of release since that would imply free energy.
Walter Lewin's channel: @lecturesbywalterlewin.they9259
MIT OCW: @mitocw
published: 23 Dec 2020
-
Conservation of Energy: Free Fall, Springs, and Pendulums
The energy of a closed system is always conserved. This is an important law of physics! But energy does change forms. What are all the forms, how do they interchange, and how does this apply to things like free fall and pendulums? You gotta watch this clip to find out, buddy!
Watch the whole Classical Physics playlist: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2
Mathematics Tutorials: http://bit.ly/ProfDaveMaths
General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
EMAIL► [email protected]
PATREON► http://patreon.com/ProfessorDaveExplains
Check out "Is This Wi-Fi Organ...
published: 13 Mar 2017
-
What Are Sources of Energy? | Energy Explained | The Dr Binocs Show | Peekaboo Kidz
What Are Sources of Energy? | Classification Of Energy Sources | Types of Energy Sources | What Is Energy? | Work, Force & Energy | Forms Of Energy | Energy Conservation | Law Of Conservation Of Energy | Laws Of Energy | Natural Sources Of Energy | Natural Resources | What Is Solar Energy? | Electric Energy | Electricity | How Is Electricity Generated? | Thermal Energy | Wind Turbines | How Do Wind Turbines Work? | Biomass | Animal Waste | Wood | Fuel | Nuclear Energy | Exhaustible Energy Resources | Non-Renewable Sources Of Energy | Environment Science | Environment | Save Earth | Fun Learning | Fun Facts | Science For Kids | Science Videos For Kids | Video For Kids | Dr Binocs Show | Peekaboo Kidz
Hey kids, in this video, Dr Binocs will explain What Are Sources of Energy? | The Dr Bino...
published: 08 Jul 2022
-
Energy Efficiency 101
Energy efficiency is measured as the ratio of energy output to energy input, as a percentage. The goal of improving energy efficiency is to deliver the same service to the end user, using less energy. Learn more about energy efficiency at www.studentenergy.org
Thank you to the Alberta Real Estate Foundation for sponsoring this episode of the Energy Systems Map.
--------
Student Energy is currently developing the Global Youth Energy Outlook, a global youth-led report that will engage 50,000 young people around the world in 2021 to gather their perspectives on energy. Want to take part? If you’re between 18-30, head to www.bit.ly/gyeo to complete the survey! You can win $100 cash prizes in each region, or a fully funded trip to the next International Student Energy Summit!
Student Energy...
published: 21 Apr 2021
-
Energy Conservation vs. Energy Efficiency
What’s the difference between energy conservation and energy efficiency? If you’re striving to lower your carbon footprint, these are two phrases you’ll hear quite a bit. Both are important factors when it comes to living a more sustainable lifestyle, but what defines each one? Watch the video to find out!
LIKE this video & SUBSCRIBE to IGS Energy for DIY guides, tips, and energy information: https://www.youtube.com/user/igsenergy
Visit IGS Energy’s WEBSITE: https://www.igs.com
Visit the IGS Energy BLOG: https://www.igs.com/energy-resource-center/blog
Visit the IGS Energy BLOG: https://www.igs.com/energy-resource-center/energy-101
And be sure to follow us on social media:
Like IGS Energy on FACEBOOK: https://www.facebook.com/IGScompanies/
Follow @IGSEnergy on TWITTER: https://twitter.c...
published: 27 Aug 2020
-
How Our Universe Violates a Fundamental Law of Physics! Energy Conservation
Claim your SPECIAL OFFER for MagellanTV here: https://try.magellantv.com/arvinash . Start your free trial TODAY so you can watch "Is the Universe Infinite?" to learn how far stars stretch out into space? And what's beyond them? https://www.magellantv.com/video/is-the-universe-infinite-
REFERENCES
General Relativity: https://youtu.be/tzQC3uYL67U
Dark Energy: https://youtu.be/YQq0VdJApzU
History of the universe: https://youtu.be/OUnYkixy3ug
All Physics Explained: https://youtu.be/TTHazQeM8v8
PATREON:
For Early Access, Input on New Videos, Personal answers to Questions, Join My Patreon:
https://www.patreon.com/arvinash
CHAPTERS
0:00 Energy only changes form
1:19 Open vs Closed vs Isolated system
2:39 Is the universe an Isolated system?
3:50 What General Relativity says about energy cons...
published: 18 Jun 2023
-
Delta Corporate Video
Delta, founded in 1971, is a global provider of switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its CSR-embedded business model to address key environmental issues, such as climate change. Delta serves customers through its sales offices, R&D centers an...
published: 30 Dec 2024
-
Energy Conservation drawing✨✨ Save Energy & Save Life 🌳🌞 ।। #saveenergy #saveearth #ytshorts
published: 06 Dec 2022
3:03
Energy Conservation | National Geographic
Renewable energy technologies have come a long way. But public attitudes lag far behind.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
About National Geographic:
...
Renewable energy technologies have come a long way. But public attitudes lag far behind.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
Get More National Geographic:
Official Site: http://bit.ly/NatGeoOfficialSite
Facebook: http://bit.ly/FBNatGeo
Twitter: http://bit.ly/NatGeoTwitter
Instagram: http://bit.ly/NatGeoInsta
Energy Conservation | National Geographic
https://youtu.be/KlG0xk93J-E
National Geographic
https://www.youtube.com/natgeo
https://wn.com/Energy_Conservation_|_National_Geographic
Renewable energy technologies have come a long way. But public attitudes lag far behind.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
Get More National Geographic:
Official Site: http://bit.ly/NatGeoOfficialSite
Facebook: http://bit.ly/FBNatGeo
Twitter: http://bit.ly/NatGeoTwitter
Instagram: http://bit.ly/NatGeoInsta
Energy Conservation | National Geographic
https://youtu.be/KlG0xk93J-E
National Geographic
https://www.youtube.com/natgeo
- published: 06 Apr 2009
- views: 173792
3:24
GCSE Physics - Conservation of Energy #4
This video covers:
- Conservation of energy principle
- Open vs closes systems
- Examples of how energy is transferred
General info:
- Suitable for all GCSE ...
This video covers:
- Conservation of energy principle
- Open vs closes systems
- Examples of how energy is transferred
General info:
- Suitable for all GCSE and IGCSE courses
Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Everything is relevant to your course!
https://wn.com/Gcse_Physics_Conservation_Of_Energy_4
This video covers:
- Conservation of energy principle
- Open vs closes systems
- Examples of how energy is transferred
General info:
- Suitable for all GCSE and IGCSE courses
Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Everything is relevant to your course!
- published: 18 Jun 2019
- views: 412659
2:05
Conservation of Energy - Best demonstration Ever !!
Professor walter lewin demonstrates the law of conservation of energy using a swinging pendulum bob.
If the pendulum is released with zero speed, it can never r...
Professor walter lewin demonstrates the law of conservation of energy using a swinging pendulum bob.
If the pendulum is released with zero speed, it can never rise above the initial point of release since that would imply free energy.
Walter Lewin's channel: @lecturesbywalterlewin.they9259
MIT OCW: @mitocw
https://wn.com/Conservation_Of_Energy_Best_Demonstration_Ever
Professor walter lewin demonstrates the law of conservation of energy using a swinging pendulum bob.
If the pendulum is released with zero speed, it can never rise above the initial point of release since that would imply free energy.
Walter Lewin's channel: @lecturesbywalterlewin.they9259
MIT OCW: @mitocw
- published: 23 Dec 2020
- views: 46222
5:19
Conservation of Energy: Free Fall, Springs, and Pendulums
The energy of a closed system is always conserved. This is an important law of physics! But energy does change forms. What are all the forms, how do they interc...
The energy of a closed system is always conserved. This is an important law of physics! But energy does change forms. What are all the forms, how do they interchange, and how does this apply to things like free fall and pendulums? You gotta watch this clip to find out, buddy!
Watch the whole Classical Physics playlist: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2
Mathematics Tutorials: http://bit.ly/ProfDaveMaths
General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
EMAIL►
[email protected]
PATREON► http://patreon.com/ProfessorDaveExplains
Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
Amazon: https://amzn.to/2HtNpVH
Bookshop: https://bit.ly/39cKADM
Barnes and Noble: https://bit.ly/3pUjmrn
Book Depository: http://bit.ly/3aOVDlT
https://wn.com/Conservation_Of_Energy_Free_Fall,_Springs,_And_Pendulums
The energy of a closed system is always conserved. This is an important law of physics! But energy does change forms. What are all the forms, how do they interchange, and how does this apply to things like free fall and pendulums? You gotta watch this clip to find out, buddy!
Watch the whole Classical Physics playlist: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2
Mathematics Tutorials: http://bit.ly/ProfDaveMaths
General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
EMAIL►
[email protected]
PATREON► http://patreon.com/ProfessorDaveExplains
Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
Amazon: https://amzn.to/2HtNpVH
Bookshop: https://bit.ly/39cKADM
Barnes and Noble: https://bit.ly/3pUjmrn
Book Depository: http://bit.ly/3aOVDlT
- published: 13 Mar 2017
- views: 616272
5:43
What Are Sources of Energy? | Energy Explained | The Dr Binocs Show | Peekaboo Kidz
What Are Sources of Energy? | Classification Of Energy Sources | Types of Energy Sources | What Is Energy? | Work, Force & Energy | Forms Of Energy | Energy Con...
What Are Sources of Energy? | Classification Of Energy Sources | Types of Energy Sources | What Is Energy? | Work, Force & Energy | Forms Of Energy | Energy Conservation | Law Of Conservation Of Energy | Laws Of Energy | Natural Sources Of Energy | Natural Resources | What Is Solar Energy? | Electric Energy | Electricity | How Is Electricity Generated? | Thermal Energy | Wind Turbines | How Do Wind Turbines Work? | Biomass | Animal Waste | Wood | Fuel | Nuclear Energy | Exhaustible Energy Resources | Non-Renewable Sources Of Energy | Environment Science | Environment | Save Earth | Fun Learning | Fun Facts | Science For Kids | Science Videos For Kids | Video For Kids | Dr Binocs Show | Peekaboo Kidz
Hey kids, in this video, Dr Binocs will explain What Are Sources of Energy? | The Dr Binocs Show | Peekaboo Kidz
Make sure you watch the whole video to know all the answers to your curious questions!
Leave your ideas, suggestions and questions for Dr. Binocs at this Email Id:
[email protected]
For more fun learning videos SUBSCRIBE to Peekaboo Kidz: http://bit.ly/SubscribeTo-Peekabookidz
Watch How Do Wind Turbines Work?, here- https://youtu.be/ia1LJE9sOxQ
Credits -
Copyrights and Publishing: Rajshri Entertainment Private Limited
All rights reserved.
#WhatAreSourcesofEnergy? #DrBinocsShow #PeekabooKidz
Catch Dr.Binocs At - https://goo.gl/SXhLmc
To Watch More Popular Nursery Rhymes Go To - https://goo.gl/CV0Xoo
To Watch Alphabet Rhymes Go To - https://goo.gl/qmIRLv
To Watch Compilations Go To - https://goo.gl/nW3kw9
Catch More Lyricals At - https://goo.gl/A7kEmO
Subscribe to Peekaboo Kidz: http://bit.ly/peekabookidz
Like our Facebook page: https://www.facebook.com/peekabootv
https://wn.com/What_Are_Sources_Of_Energy_|_Energy_Explained_|_The_Dr_Binocs_Show_|_Peekaboo_Kidz
What Are Sources of Energy? | Classification Of Energy Sources | Types of Energy Sources | What Is Energy? | Work, Force & Energy | Forms Of Energy | Energy Conservation | Law Of Conservation Of Energy | Laws Of Energy | Natural Sources Of Energy | Natural Resources | What Is Solar Energy? | Electric Energy | Electricity | How Is Electricity Generated? | Thermal Energy | Wind Turbines | How Do Wind Turbines Work? | Biomass | Animal Waste | Wood | Fuel | Nuclear Energy | Exhaustible Energy Resources | Non-Renewable Sources Of Energy | Environment Science | Environment | Save Earth | Fun Learning | Fun Facts | Science For Kids | Science Videos For Kids | Video For Kids | Dr Binocs Show | Peekaboo Kidz
Hey kids, in this video, Dr Binocs will explain What Are Sources of Energy? | The Dr Binocs Show | Peekaboo Kidz
Make sure you watch the whole video to know all the answers to your curious questions!
Leave your ideas, suggestions and questions for Dr. Binocs at this Email Id:
[email protected]
For more fun learning videos SUBSCRIBE to Peekaboo Kidz: http://bit.ly/SubscribeTo-Peekabookidz
Watch How Do Wind Turbines Work?, here- https://youtu.be/ia1LJE9sOxQ
Credits -
Copyrights and Publishing: Rajshri Entertainment Private Limited
All rights reserved.
#WhatAreSourcesofEnergy? #DrBinocsShow #PeekabooKidz
Catch Dr.Binocs At - https://goo.gl/SXhLmc
To Watch More Popular Nursery Rhymes Go To - https://goo.gl/CV0Xoo
To Watch Alphabet Rhymes Go To - https://goo.gl/qmIRLv
To Watch Compilations Go To - https://goo.gl/nW3kw9
Catch More Lyricals At - https://goo.gl/A7kEmO
Subscribe to Peekaboo Kidz: http://bit.ly/peekabookidz
Like our Facebook page: https://www.facebook.com/peekabootv
- published: 08 Jul 2022
- views: 964870
3:14
Energy Efficiency 101
Energy efficiency is measured as the ratio of energy output to energy input, as a percentage. The goal of improving energy efficiency is to deliver the same ser...
Energy efficiency is measured as the ratio of energy output to energy input, as a percentage. The goal of improving energy efficiency is to deliver the same service to the end user, using less energy. Learn more about energy efficiency at www.studentenergy.org
Thank you to the
Alberta Real Estate Foundation for sponsoring this episode of the Energy Systems Map.
--------
Student Energy is currently developing the Global Youth Energy Outlook, a global youth-led report that will engage 50,000 young people around the world in 2021 to gather their perspectives on energy. Want to take part? If you’re between 18-30, head to www.bit.ly/gyeo to complete the survey! You can win $100 cash prizes in each region, or a fully funded trip to the next International Student Energy Summit!
Student Energy is a global youth-led organization empowering the next generation of leaders who are accelerating the transition to a sustainable, equitable energy future. We work with a network of 50,000 young people from over 120 countries to build the knowledge, skills, and networks they need to take action on energy. Learn more at www.studentenergy.org
--------
Attributions:
Glass Vectors by Vecteezy: https://www.vecteezy.com/free-vector/glass
Fruit Vectors by Vecteezy: https://www.vecteezy.com/free-vector/vector
Radiator Vectors by Vecteezy: https://www.vecteezy.com/free-vector/radiator
Meat Vectors by Vecteezy: https://www.vecteezy.com/free-vector/meat
Milk Vectors by Vecteezy: https://www.vecteezy.com/free-vector/milk
Nature Vectors by Vecteezy: https://www.vecteezy.com/free-vector/nature
https://wn.com/Energy_Efficiency_101
Energy efficiency is measured as the ratio of energy output to energy input, as a percentage. The goal of improving energy efficiency is to deliver the same service to the end user, using less energy. Learn more about energy efficiency at www.studentenergy.org
Thank you to the
Alberta Real Estate Foundation for sponsoring this episode of the Energy Systems Map.
--------
Student Energy is currently developing the Global Youth Energy Outlook, a global youth-led report that will engage 50,000 young people around the world in 2021 to gather their perspectives on energy. Want to take part? If you’re between 18-30, head to www.bit.ly/gyeo to complete the survey! You can win $100 cash prizes in each region, or a fully funded trip to the next International Student Energy Summit!
Student Energy is a global youth-led organization empowering the next generation of leaders who are accelerating the transition to a sustainable, equitable energy future. We work with a network of 50,000 young people from over 120 countries to build the knowledge, skills, and networks they need to take action on energy. Learn more at www.studentenergy.org
--------
Attributions:
Glass Vectors by Vecteezy: https://www.vecteezy.com/free-vector/glass
Fruit Vectors by Vecteezy: https://www.vecteezy.com/free-vector/vector
Radiator Vectors by Vecteezy: https://www.vecteezy.com/free-vector/radiator
Meat Vectors by Vecteezy: https://www.vecteezy.com/free-vector/meat
Milk Vectors by Vecteezy: https://www.vecteezy.com/free-vector/milk
Nature Vectors by Vecteezy: https://www.vecteezy.com/free-vector/nature
- published: 21 Apr 2021
- views: 75874
1:33
Energy Conservation vs. Energy Efficiency
What’s the difference between energy conservation and energy efficiency? If you’re striving to lower your carbon footprint, these are two phrases you’ll hear qu...
What’s the difference between energy conservation and energy efficiency? If you’re striving to lower your carbon footprint, these are two phrases you’ll hear quite a bit. Both are important factors when it comes to living a more sustainable lifestyle, but what defines each one? Watch the video to find out!
LIKE this video & SUBSCRIBE to IGS Energy for DIY guides, tips, and energy information: https://www.youtube.com/user/igsenergy
Visit IGS Energy’s WEBSITE: https://www.igs.com
Visit the IGS Energy BLOG: https://www.igs.com/energy-resource-center/blog
Visit the IGS Energy BLOG: https://www.igs.com/energy-resource-center/energy-101
And be sure to follow us on social media:
Like IGS Energy on FACEBOOK: https://www.facebook.com/IGScompanies/
Follow @IGSEnergy on TWITTER: https://twitter.com/igsenergy
Follow @IGSEnergy on INSTAGRAM: https://www.instagram.com/igsenergy/
https://wn.com/Energy_Conservation_Vs._Energy_Efficiency
What’s the difference between energy conservation and energy efficiency? If you’re striving to lower your carbon footprint, these are two phrases you’ll hear quite a bit. Both are important factors when it comes to living a more sustainable lifestyle, but what defines each one? Watch the video to find out!
LIKE this video & SUBSCRIBE to IGS Energy for DIY guides, tips, and energy information: https://www.youtube.com/user/igsenergy
Visit IGS Energy’s WEBSITE: https://www.igs.com
Visit the IGS Energy BLOG: https://www.igs.com/energy-resource-center/blog
Visit the IGS Energy BLOG: https://www.igs.com/energy-resource-center/energy-101
And be sure to follow us on social media:
Like IGS Energy on FACEBOOK: https://www.facebook.com/IGScompanies/
Follow @IGSEnergy on TWITTER: https://twitter.com/igsenergy
Follow @IGSEnergy on INSTAGRAM: https://www.instagram.com/igsenergy/
- published: 27 Aug 2020
- views: 33801
12:42
How Our Universe Violates a Fundamental Law of Physics! Energy Conservation
Claim your SPECIAL OFFER for MagellanTV here: https://try.magellantv.com/arvinash . Start your free trial TODAY so you can watch "Is the Universe Infinite?" to ...
Claim your SPECIAL OFFER for MagellanTV here: https://try.magellantv.com/arvinash . Start your free trial TODAY so you can watch "Is the Universe Infinite?" to learn how far stars stretch out into space? And what's beyond them? https://www.magellantv.com/video/is-the-universe-infinite-
REFERENCES
General Relativity: https://youtu.be/tzQC3uYL67U
Dark Energy: https://youtu.be/YQq0VdJApzU
History of the universe: https://youtu.be/OUnYkixy3ug
All Physics Explained: https://youtu.be/TTHazQeM8v8
PATREON:
For Early Access, Input on New Videos, Personal answers to Questions, Join My Patreon:
https://www.patreon.com/arvinash
CHAPTERS
0:00 Energy only changes form
1:19 Open vs Closed vs Isolated system
2:39 Is the universe an Isolated system?
3:50 What General Relativity says about energy conservation
6:00 Evidence for Violation of Energy conservation
7:40 Could lost energy be transforming into Dark Energy?
8:50 If the Universe is infinite, then all bets are off
9:47 Even if not infinite, we are almost certainly losing energy
10:28 Opposing view on why Energy could still be conserved
SUMMARY
The law of energy conservation may be the most fundamental law in physics. It says that overall energy is always conserved. It can never be created nor destroyed - it can only change form. But this law is probably violated by our universe as a whole.
Specifically, the Energy Conservation law states that in an isolated system, that is a system in which no matter or energy enters or leaves, overall energy remains the same. Energy only changes form.
But isn't the entire universe a well-defined isolated system? Since the universe if everything, shouldn’t it be the ultimate isolated system? It turns out that the answer not straightforward. If we want to include the whole universe, we have to include everything from the very small to the very large. Let’s start with the very small. The behavior at the micro-scale is described by quantum mechanics.
At the quantum level, the concept of energy conservation is explicitly defined. This is shown in the Schrodinger equation, which states that total energy is equal to kinetic energy plus potential energy. Energy is conserved according to this equation. So there is no problem at micro scales.
But at the largest scales, where Einstein’s theory of general relativity applies, this is not the case. What his field equations show is that the derivative of the energy-momentum tensor is zero. So the simplified way to think of this is that the change in energy and momentum remains zero. This is called the principle of energy momentum conservation.
This equation is not saying that energy stays the same, only that the combination of energy AND momentum remains the same. This means that energy can change, as long as the combination of energy and momentum doesn't change. So, it tells us that at large scales, energy is really not conserved in the universe.
Several observations confirm this. First is the expansion of the universe. Empty space has energy. If the volume of this space is increasing then energy is increasing. We know that the energy density of spacetime doesn’t change, but energy density is energy over volume. If the volume increases, then energy also increases.
Another consequence of an expanding spacetime is the observed redshift. The light from distant galaxies is redshifted. As the universe expands, the wavelength of light also expands, which means it loses energy. So light is losing energy within an expanding spacetime from our perspective.
Could it be that the energy that light waves lose turns into dark energy, thus conserving energy overall? The answer is no. I explain why in the video.
In an expanding universe, we don't even know what the size of the universe really is, so we can’t define what the isolated system would be. We only know the observable universe, which is about 94 billion light years in diameter. But there is a cosmic event horizon which is the end of this observable universe. We don't know how big big the universe is beyond this horizon.
If the universe is infinite, then we would have to conclude that the universe likely does not conserve energy.
Evan if the universe is not infinite, it is probably still the case that it is much much larger than the 94 billion year diameter that we observe. We are losing energy of the galaxies that are moving out of the observable universe.
#energyconservation
Some experts believe that overall energy is conserved in an expanding universe because, they say, you have to include the energy of the gravitational field along with the energy of the matter and radiation. In other words, as distances between objects increase, the increasing gravitational potential between them, which is a kind of negative energy, also increases, balancing overall energy.
https://wn.com/How_Our_Universe_Violates_A_Fundamental_Law_Of_Physics_Energy_Conservation
Claim your SPECIAL OFFER for MagellanTV here: https://try.magellantv.com/arvinash . Start your free trial TODAY so you can watch "Is the Universe Infinite?" to learn how far stars stretch out into space? And what's beyond them? https://www.magellantv.com/video/is-the-universe-infinite-
REFERENCES
General Relativity: https://youtu.be/tzQC3uYL67U
Dark Energy: https://youtu.be/YQq0VdJApzU
History of the universe: https://youtu.be/OUnYkixy3ug
All Physics Explained: https://youtu.be/TTHazQeM8v8
PATREON:
For Early Access, Input on New Videos, Personal answers to Questions, Join My Patreon:
https://www.patreon.com/arvinash
CHAPTERS
0:00 Energy only changes form
1:19 Open vs Closed vs Isolated system
2:39 Is the universe an Isolated system?
3:50 What General Relativity says about energy conservation
6:00 Evidence for Violation of Energy conservation
7:40 Could lost energy be transforming into Dark Energy?
8:50 If the Universe is infinite, then all bets are off
9:47 Even if not infinite, we are almost certainly losing energy
10:28 Opposing view on why Energy could still be conserved
SUMMARY
The law of energy conservation may be the most fundamental law in physics. It says that overall energy is always conserved. It can never be created nor destroyed - it can only change form. But this law is probably violated by our universe as a whole.
Specifically, the Energy Conservation law states that in an isolated system, that is a system in which no matter or energy enters or leaves, overall energy remains the same. Energy only changes form.
But isn't the entire universe a well-defined isolated system? Since the universe if everything, shouldn’t it be the ultimate isolated system? It turns out that the answer not straightforward. If we want to include the whole universe, we have to include everything from the very small to the very large. Let’s start with the very small. The behavior at the micro-scale is described by quantum mechanics.
At the quantum level, the concept of energy conservation is explicitly defined. This is shown in the Schrodinger equation, which states that total energy is equal to kinetic energy plus potential energy. Energy is conserved according to this equation. So there is no problem at micro scales.
But at the largest scales, where Einstein’s theory of general relativity applies, this is not the case. What his field equations show is that the derivative of the energy-momentum tensor is zero. So the simplified way to think of this is that the change in energy and momentum remains zero. This is called the principle of energy momentum conservation.
This equation is not saying that energy stays the same, only that the combination of energy AND momentum remains the same. This means that energy can change, as long as the combination of energy and momentum doesn't change. So, it tells us that at large scales, energy is really not conserved in the universe.
Several observations confirm this. First is the expansion of the universe. Empty space has energy. If the volume of this space is increasing then energy is increasing. We know that the energy density of spacetime doesn’t change, but energy density is energy over volume. If the volume increases, then energy also increases.
Another consequence of an expanding spacetime is the observed redshift. The light from distant galaxies is redshifted. As the universe expands, the wavelength of light also expands, which means it loses energy. So light is losing energy within an expanding spacetime from our perspective.
Could it be that the energy that light waves lose turns into dark energy, thus conserving energy overall? The answer is no. I explain why in the video.
In an expanding universe, we don't even know what the size of the universe really is, so we can’t define what the isolated system would be. We only know the observable universe, which is about 94 billion light years in diameter. But there is a cosmic event horizon which is the end of this observable universe. We don't know how big big the universe is beyond this horizon.
If the universe is infinite, then we would have to conclude that the universe likely does not conserve energy.
Evan if the universe is not infinite, it is probably still the case that it is much much larger than the 94 billion year diameter that we observe. We are losing energy of the galaxies that are moving out of the observable universe.
#energyconservation
Some experts believe that overall energy is conserved in an expanding universe because, they say, you have to include the energy of the gravitational field along with the energy of the matter and radiation. In other words, as distances between objects increase, the increasing gravitational potential between them, which is a kind of negative energy, also increases, balancing overall energy.
- published: 18 Jun 2023
- views: 157802
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Delta Corporate Video
Delta, founded in 1971, is a global provider of switching power supplies and thermal management products with a thriving portfolio of smart energy-saving system...
Delta, founded in 1971, is a global provider of switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its CSR-embedded business model to address key environmental issues, such as climate change. Delta serves customers through its sales offices, R&D centers and manufacturing facilities spread over close to 200 locations across 5 continents.
Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies and dedication to CSR. Since 2011, Delta has been listed on the DJSI World Index of Dow Jones Sustainability™ Indices for 9 consecutive years. Delta also ranked at the Climate Change Leadership Level by CDP for the 3rd year in 2019.
https://wn.com/Delta_Corporate_Video
Delta, founded in 1971, is a global provider of switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its CSR-embedded business model to address key environmental issues, such as climate change. Delta serves customers through its sales offices, R&D centers and manufacturing facilities spread over close to 200 locations across 5 continents.
Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies and dedication to CSR. Since 2011, Delta has been listed on the DJSI World Index of Dow Jones Sustainability™ Indices for 9 consecutive years. Delta also ranked at the Climate Change Leadership Level by CDP for the 3rd year in 2019.
- published: 30 Dec 2024
- views: 32