# What is energy?

### What is energy?

Energy is central to existence. But what is it exactly? Energy has diverse forms and is conserved in ideal closed systems...

"It is important to realize that in physics today, we have no knowledge of what energy is. We do not have a picture that energy comes in little blobs of a definite amount. It is not that way. However, there are formulas for calculating some numerical quantity and when we add it together it gives “28″—always the same number. It is an abstract thing in that it does not tell us the mechanisms or the reasons for the various formulas." -- R. P. Feynman.

https://en.wikipedia.org/wiki/Energy
Guest

### Re: What is energy?

Guest wrote:Energy is central to existence. But what is it exactly? Energy has diverse forms and is conserved in ideal closed systems...

"It is important to realize that in physics today, we have no knowledge of what energy is. We do not have a picture that energy comes in little blobs of a definite amount. It is not that way. However, there are formulas for calculating some numerical quantity and when we add it together it gives “28″—always the same number. It is an abstract thing in that it does not tell us the mechanisms or the reasons for the various formulas." -- R. P. Feynman.

https://en.wikipedia.org/wiki/Energy

FYI: The Three Laws of Thermodynamics and an attached file by a physics teacher that explains energy is not the ability to do work... may help to answer your question.

https://courses.lumenlearning.com/introchem/chapter/the-three-laws-of-thermodynamics/
Attachments
robert-lehrman-energy-is-not-the-abillity-to-do-work.pdf
Guest

### Re: What is energy?

Energy is a manifestation of a system, opened or closed, acting on itself, globally or locally. And therefore, it or its subsystems can be modeled mathematically... David Hilbert had stated there's a need to postulate fundamental axioms about the system's existence and about the system's nature over time and over space. Please refer to the following links for some insights on how we may proceed with the modeling of any physical system.

https://en.wikipedia.org/wiki/Hilbert%27s_sixth_problem

https://royalsocietypublishing.org/doi/abs/10.1098/rspa.1934.0059

Dave.
Guest

### Re: What is energy?

FYI: 'Hilbert’s sixth problem: the endless road to rigour',

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5869544/.
Guest

### Re: What is energy?

'How are mass and radiant energy distributed in the universe?',

https://www.math10.com/forum/viewtopic.php?f=32&t=8331

'What is the most important equation in science?',

https://www.math10.com/forum/viewtopic.php?f=32&t=8272.
Attachments
Big Bang Expansion.jpg (6.93 KiB) Viewed 1015 times
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### Re: What is energy?

Some Food for Thought:

"Science is an adventure of the human spirit. It is essentially an artistic enterprise, stimulated largely by curiosity, served largely by disciplined imagination, and based largely on faith in the reasonableness, order, and beauty of the universe." -- Warren Weaver.
Guest

### Re: What is energy?

Some Food for Thought:

"Scientists predict the behavior of a complex system by developing a model of its inputs, throughputs (flows) of matter, energy, or information, and outputs of matter, energy, and information."
Guest

### Re: What is energy?

'Introduction to Energy Physics',

https://epdf.pub/introduction-to-energy-physics.html;

'INTRODUCTION TO MATHEMATICAL PHYSICS',

https://epdf.pub/introduction-to-mathematical-physics2267f5070df940cc17c0a9d33785caeb88706.html.
Guest

### Re: What is energy?

'Breakthrough enables storage and release of mechanical waves without energy loss',

https://phys.org/news/2019-08-breakthrough-enables-storage-mechanical-energy.html.
Guest

### Re: What is energy?

'Thermodynamics' by the late great Enrico Fermi,
1938 Nobel Laureate in Physics,

Guest

### Re: What is energy?

Energy is the source of everything possible. And it is everywhere... Now, please consider the following story.

'Transformative? New Device Harvests Energy from Darkness:
It doesn’t generate much power, but it works during the one time of day that solar cells can’t: night.',

https://www.nytimes.com/2019/09/12/science/solar-energy-power-electricity.html?action=click&module=Well&pgtype=Homepage&section=Science.
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### Re: What is energy?

WOW! THINK BIG ON ENERGY!

FYI: 'Kardashev Scale',

https://en.wikipedia.org/wiki/Kardashev_scale
Attachments
Kardashev Energy Scale.png (75.82 KiB) Viewed 852 times
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### Re: What is energy?

Wow! Go Blue! 'Most powerful laser in the U.S. to be built at U-M',

https://record.umich.edu/articles/most-powerful-laser-in-the-u-s-to-be-built-at-u-m/.
Guest

### Re: What is energy?

FYI: "The discovery definitively confirms that heavier elements in the universe can be made in the mergers of neutron stars, at last helping answer the puzzle of how chemical elements form."

'SCIENTISTS FIND ANSWER TO VAST PUZZLE ABOUT THE UNIVERSE IN THE MIDDLE OF TWO COLLIDING STARS',

Guest

### Re: What is energy?

Guest wrote:Wow! Go Blue! 'Most powerful laser in the U.S. to be built at U-M',

https://record.umich.edu/articles/most-powerful-laser-in-the-u-s-to-be-built-at-u-m/.

'Nobel laureate’s story highlights value of science literacy',

https://record.umich.edu/articles/nobel-laureates-story-highlights-value-of-science-literacy/.
Guest

### Re: What is energy?

FYI: 'On the Global Challenge: Offshore wind could power the world',

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### Re: What is energy?

FYI: 'FYI: 'Researchers create blueprint for 'quantum battery' that doesn't lose charge',

https://phys.org/news/2019-10-blueprint-quantum-battery-doesnt.html.
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