Sorry guys i have to strongly disagree on this one. in basic physics/chemistry terms such as 8th grade you'd be right. But as you probably learned in 9th grade and every year after that things get simplified so they are teachable. In an exothermic chemical reaction such as when fuel is burned the mass or particles and mass of chemical bonds is more than the final mass. only minutely. The new chemical bonds have less energy, so mass decreases even though the number of C atoms, for example, is constant.Trocola wrote:The energy you get from the ICE comes from a chemical reaction. The Carbon and the Hydrogen on the gasoline combines with the Oxygen of the air and it oxidates the gasoline, creating water an carbon dioxide (and a bit of carbon monoxide and nitrous oxydes, but they are minimal). The energy you obtain comes from the changes in energy states the atoms suffer when they are combining. Thats 8th grade chemistryelliott2705 wrote: There is no anti-matter reactor in a car. There is however a device that converts mass to energy, its called an internal combustion engine. The energy lost to heat and work when the fuel is burned will correspond to the reduction in mass of the exhaust gases.
the ecuation E=mc2 tells us that energy can be "stored" as mass, not that all energy is mass
That's what I was trying to explain. My english is not very good and it takes me a lot to explain myselfbeelsebob wrote:Urgh. No. You lot apparently know just enough to be dangerous.
The fact that there is an equation, does not mean it always applies. What E=mc^2 says is that you can gain a certain amount of energy by destroying a certain amount of mass. It does not say that there is no way to release stored energy that does not involve this equation. As an example. A rock falling down a hill gains kinetic energy while not changing mass whatsoever. The way it does that is by losing its gravitational potential energy as it falls. In an F1 car, the way we produce kinetic energy is by releasing chemical potential energy. not by converting mass into energy, as you might in a nuclear explosion, or a matter/antimatter explosion.
E=mc^2 is simply the wrong formula to apply.
All energy is mass and contributes to the relativistic mass of an object. That is exactly what that formula is saying. It also applies to every process where energy is gained or lost by an object, including a rock falling down a hill. It doesn't get used because the increase in mass is completely inconsequential.
have a read of this: http://www.decodedscience.com/is-there- ... emc2/22390 and http://scienceblogs.com/startswithabang ... fects-you/there is tons of information out there but this is explained fairly simply and relating to a non=nuclear process. I appreciate theses aren't authoritative sources, most journal articles on the subject don't look at things as small as charging a battery or burning wood, the mass involves is just so minute.
In summary:But E = mc2 comes into play in much less spectacular places than that: the paltry chemical reactions that underlie all the biological (and inorganic) processes of everyday life are all based on how electrons are bound to atoms and molecules. There are different energy levels and configurations that electrons transitions between; bonds are formed, broken and re-formed, and energy is either absorbed or emitted to balance each individual reaction out.
The crazy part? When a plant absorbs a photon for photosynthesis, it increases in mass in direct proportion to the energy of the photon it absorbed, following the law of E = mc2. When a human burns through his-or-her chemical fuel in order to maintain their body temperature, they lose mass in direct proportion to the energy released from the breaking of those chemical bonds. In fact, if I did something as simple as weighed a free electron and a free proton on one end of a scale, and weighed a neutral, ground-state hydrogen atom on the other end, I’d find that the free electron and proton weighed more by 13.6 eV/c2, exactly the mass-equivalent of the energy needed to ionize a neutral hydrogen atom!
-E=Mc2 refers to the change in mass when you impart
energy to a body.
-The mass of a solid body can not be converted
entirely to energy. In fact only a tiny fraction.
-E=Mc2 refers to all systems not just nuclei
I don't want to keep arguing on the matter, we are so far off topic. If you don't get it and would like to discuss further PM me or google mass-energy equivalence.