Energy

[Mercedes Benzene]

I was just thinking about this a few minutes ago:

Eeintein's theorum gave way to use being able to convert mass into energy.

Is it possible, or do you think it will be possible, to create mass (substance), from energy??

[InfiniteNow]

Mass and energy are the same thing, inseperable. You're not creating either of them, simply changing forms.

 

 

Cheers. :rose:

[Mercedes Benzene]

Mass and energy are the same thing, inseperable. You're not creating either of them, simply changing forms.

 

yes. I should have said "convert", instead of "create".

That's what I was wondering.

[Nootropic]

It's entirely possible, as InfiniteNow mentioned; just like you can change the equation, you can change their forms. Although it is highly inefficient with our current technology. For a better explanation I would reccomend Isaac Asimov's book on...well, I forgot the title but I think it's something along the lines of the 50 most asked questions in science. He delivers probably the best answer I've heard.

[arkain101]

You can, but you need to take a large number of energy to compress it into a peice of mass so small its almost undetectable.

 

The nuclear bomb demonstrates mass changing to energy. But this only splits a part of the atom. It only uses 0.1% of the energy E=MC2 will calculate. If the bombs worked with 100% efficiency we would be in alot of trouble. This is called nuclear fission, it fizzes the atom. Like if you pull on a string between each hand and your elbows are aligned to hit two balls. When the string snaps your potential energy will release and hit the ball with amazing acceleration and force. However, you would have to break it over and over untill there was nothing left but dust to use it all.

Sort of like this, is an atom.

 

Fussion I guess creates more energy.

[Lsos]

Just by accelerating something you are converting energy into mass, according to the theory of relativity. The faster something moves the higher its mass. Happens all the time in particle accelerators. I heard particles' masses can increase thousands of times in the most powerful accelerators.

[anglepose]

Even simpler form than particle mumbo jumbo.

take plants and there photosynthesis

[HydrogenBond]

Mass and energy are not the same. Mass can not travel at C but energy can. These are two different phenomena. If we create mass from energy it tends to divide into matter and anti-matter, which cancels back to energy. It is not a stable conversion. Matter into energy is different. This does not divide into energy and anti-energy pairs, only energy.

 

Relativistic mass is a little different than real mass. Relativistic mass and energy are two aspect of the same thing. It takes energy to make relativstic mass, If one creates relativistic mass in a particle accelerator and then slows the particles down, one does not end up with more stable mass particles, i.e., protons, electrons, etc. The relativistic mass is virtual mass and ends up as short lived particles leading to energy.

[Lsos]

Even simpler form than particle mumbo jumbo.

take plants and there photosynthesis

 

I don't think any mass gets made in this process...we end up with the same amount we started.

[Mercedes Benzene]

Yea... and in plants, energy isn't really created from mass. The mass is used AS energy, and is still the same amount of mass as before photosynthesis.

[ronthepon]

Mass has been made from energy.

 

I believe it was by the collision of photons to form electrons and positrons.

[Racoon]

Mass has been made from energy.

 

and energy from mass.

Its like Yin - Yang...

 

Its a wonderful thing :)

 

what about the word Power?

Mass divided by space and time?

[Qfwfq]

Mass is just rest energy.

 

A hot brick at rest has slightly more energy than the same brick cold, at rest. So, in the same gravitational field it will weigh slightly more. If you buy them buy weight, make sure the vendor lets them fully cool down before weighing them. :confused:

 

Similarly, the total mass of a sugar molecule and 9 oxygen molecules is greater than the total mass of 6 of carbon dioxide and 6 of water.

[ronthepon]

Mass is just rest energy.

 

A hot brick at rest has slightly more energy than the same brick cold, at rest. So, in the same gravitational field it will weigh slightly more. If you buy them buy weight, make sure the vendor lets them fully cool down before weighing them. :confused:

 

Similarly, the total mass of a sugar molecule and 9 oxygen molecules is greater than the total mass of 6 of carbon dioxide and 6 of water.

Quite right, although we normally consider this energy negligible.

 

To show a more prominent example (and less connected with the day-to-day life) we can look at Uranium-235, it's mass added to a neutron which hits it, and compare it with the masses of the fission products. A difference in mass (called mass defect) is seen.

[hallenrm]

Let's clear our basics first!

 

Mass and Energy are concepts, and scientific concepts are created only once, in the mass conciousness of scientists!!

 

So, let us not talk about creation of mass, or energy for that matter, they are only attributes of substances that can be made and transformed.

 

As racoon commented, mind your words!!!:confused:

[ronthepon]

So energy is the potential to bring about energy. We can't include energy in the genre of free existing things.

 

That is new for me.

[Qfwfq]

So energy is the potential to bring about energy.

No, it's the potential of performing work. And work, of course, is a transfer of energy.