-- Posted by Rayne22 at 4:52 pm on Jan. 23, 2007 Is it true that energy can't be created or destroyed? -- Posted by Absynthia at 4:52 pm on Jan. 23, 2007 according to newtons law yes -- Posted by Saralita at 4:52 pm on Jan. 23, 2007 yessir. -- Posted by Jay2325 at 4:53 pm on Jan. 23, 2007 uh, yeah. -- Posted by Rhino at 4:53 pm on Jan. 23, 2007 As far as we as humans know, yes.  It's all basic high school psychics. -- Posted by halfsithalready at 4:53 pm on Jan. 23, 2007 yes -- Posted by Tigerhawk at 4:53 pm on Jan. 23, 2007 Yeah, it just goes back and forth between the particles! -- Posted by Alan18 at 4:55 pm on Jan. 23, 2007 All matter is trapped energy -- Posted by FurryPanther at 4:55 pm on Jan. 23, 2007 No. Matter and energy must be conserved. Matter can be destroyed, but energy is created in the reaction. According to the theory of general relativity, at least. FP -- Posted by shutter bugs at 4:55 pm on Jan. 23, 2007 yep energy is always there -- Posted by dethrose at 4:59 pm on Jan. 23, 2007 Energy can never be created or destroyed, no. -- Posted by AtomicCactus at 5:40 pm on Jan. 23, 2007 I just ate a granola bar, and now I have not granola bar. How do you explain that? But yeah, what FP said.  Take the nucleus of an atom, for example.  Say, it has 6 protons and 6 neutrons.  The weight of the nucleus itself with the 12 nucleons is less than the weight of each 12 nucleon added together.  This is due to the conversion of mass and energy.  The binding energy of the nucleus (the energy that holds the nucleons together) is transformed from matter.  When split apart, the energy is converted back into mass, thus restoring the "lost weight". -- Posted by muscleman at 7:00 pm on Jan. 25, 2007 the hell with the basic laws of thermodynamics.  Free energy sources will be reality.   -- Posted by AtomicCactus at 9:55 pm on Jan. 28, 2007 Quote: from muscleman at 9:00 pm on Jan. 25, 2007 the hell with the basic laws of thermodynamics.  Free energy sources will be reality.   Link? =) -- Posted by muscleman at 6:25 pm on Jan. 29, 2007 My brain. -- Posted by holysaiyan1 at 10:30 pm on Feb. 2, 2007 That would actually be the Law of Conservation of Energy, which predates Einstein by about 100 years.  You can not create energy that was not existing in some other form elsewhere, and you can not destroy energy.  Energy can only be transformed into other forms of energy, or transmuted into matter. 1 kilowatt-hour (roughly the energy consumed by running a toaster for 1 hour) is equal to 4.0055402e-11 grams of matter. -- Posted by asb at 2:13 pm on Feb. 7, 2007 For everyday purposes, we have the 1st law of thermodynamics (which incidentally is an empirical law).  This states that, for a system, the internal energy is equal to the heat input to it less the work output from it.  Thus we have three forms of energy - potential energy (internal) eg from position in a magnetic or gravitational field, or chemical energy; heat, which is a bit hard to define; and work, which can be defined as a quantity that could be used to raise a weight. The laws of thermodynamics apply to things on the human scale - on the quantum or universal scales they may not hold. -- Posted by goodman at 3:45 am on Mar. 8, 2007 energy to mass -- Posted by Ryan Potter at 4:00 pm on Mar. 10, 2007 Scientists now have actually proven than mass and energy are the same thing, and as Alan18 said above, matter is just trapped energy.  Einstein proved that mass can be converted to energy with E = mc^2, and this was shown the the nuclear bombs. After doing this, scientists though that it must work the other way around, so they collided two immensely powerful units of pure energy together, and two small particles magically appeared, so yes, matter is never created or destroyed, it only changes form... even if that form is energy.  We need to come up with a word that describes mass and energy together. -- Posted by norock at 6:07 pm on Mar. 10, 2007 Quote: from Ryan Potter at 4:00 pm on Mar. 10, 2007 After doing this, scientists though that it must work the other way around, so they collided two immensely powerful units of pure energy together, and two small particles magically appeared, ive never heard about this one lol link? -- Posted by Ryan Potter at 8:04 pm on Mar. 10, 2007 http://answers.yahoo.com/question/index?qid=20070212202759AAEgDsN The first respondent confirms this. -- Posted by norock at 9:59 am on Mar. 11, 2007 i didnt see anything... however, i think you are referring to particle accellerator experiments, where electrons and positrons are collided, creating small particles. however, these particles cannot be grouped [as if you were trying to create molecules, because they would not have proper electric charges, and/or leptons. is it possible to create what we consider matter [things we can see/touch] not at this point in time. the fermilab accellerator [a VERY large one] drains half a city's electric, and still cant produce many particles. however, is it possible to create particles from energy at this time, yes. -- Posted by Moridin at 2:54 am on Mar. 12, 2007 Energy and mass are not 'the same thing'. That statement can lead to more confusion than it solves. You cannot just convert an electron to energy just like that. That would violate the conservation of spin and the conservation of charge. Also, electrons are affected by the strong and weak interaction, whereas a photon is not. A positron is required for the event to take place. Energy and mass are different manifestations of the same thing. norock, that user is most likely speaking of pair production. http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html -- Posted by I live for the net at 2:07 am on Mar. 13, 2007 Read relativity. -- Posted by JohnTheNormalOne at 2:15 pm on Mar. 20, 2007 Mass is like a concetrated energy. If you join up an electron and an positron, they will neutralise and turn into energy. Also, you can concetrate energy (in accelerators) by impacting some particles. I'm not quite shure how that works, but I know that immense temperature and pressure are created, and then energy released is turned into equal amount of particles and antiparticles. Proved by the theory of relativity and quantum physics. People did that already.