What the crap does "E=mc2" mean?
458495
The theoretical physics equation E = mc2 states a relationship between energy (E), in whatever form, and mass (m). In this formula, c², the square of the speed of light in vacuum, is the conversion factor required to formally convert from units of mass to units of energy, i.e. the energy per unit mass. In unit specific terms, E (Joules) = M (kilograms) · (299792458 m/s) 2.\n\nThis formula, which was discovered by Albert Einstein, proposes that when a body has a mass (measured at rest), it has a certain (a very large) amount of energy associated with this mass. This is opposed to the Newtonian mechanics, in which a massive body at rest has no kinetic energy, and may or may not have other (relatively small) amounts of internal stored energy (such as chemical or thermal energy), in addition to any potential energy it may have from its position in a field of force. That is why a body's mass, in Einstein's theory, is often called the rest energy of the body. The E of the formula can be seen as the total energy of the body, which is proportional to the mass when the body is at rest.\n\nConversely, a single photon travelling in empty space cannot be considered to have an effective mass, m, according to the above equation. The reason is that such a photon cannot be measured in any way to be at "rest" and the formula above applies only to single particles when they are at rest. Photons are generally considered to be "massless," (i.e., they have no rest mass or invariant mass) even though they have varying amounts of energy.\n\n\nENERGY=MASS x Speed square \n\n\nbtw  check out my website \n\nhttp://oldman.netfirms.com/
130040
http://en.wikipedia.org/wiki/E_%28mathematical_constant%29\nfor the significance of e and how it is used, use this link
1156590
E = energy\nm = mass\nc^2 = speed of light squared\nMass and energy are equivalent.\nThis is a part of theory of relativity of Albert Einstein.\n\nDuring nuclear fission and fusion about 1% mass disappears and an equivalent amount of energy comes free.\n\nDuring annihilisation all mass 'changes' into energy.\nDuring creation of an electron and positron the inverse happens.
711054
It's two.  Energy goes as the square of amplitude.
276671
(e^(cose^e+sin^e)/2)^pi\nhahaha ..just kidding
135213
His role is discoving the equation of energy. E=MC squared.
791590
E = m x c^2,\nso \n\nmass = Energy / c^2 (speed of light squared)
394861
I have no idea. But Steven Hawking says we cant travel back in time, and Einstein showed that hitting the speed of light with a mass is pretty unlikely. But that has no effect on the massless.\n\nAnd E=MC2 is just the rest energy of a particle of mass M and has no time travel implications.\n\nI know Cal-tech has some research in this field... look into it.
428474
m(e) = (2/3) log(e / 10^4.4) energy release = 2 * 10^17?\n\nWhat is the question?  Do you want to know what value of e makes (2/3) log(e / 10^4.4) = 2 * 10^17 ?\n\nThat would mean\nlog(e / 10^4.4) = (3/2) * 2 * 10^17 = 3 * 10^17\ne / 10^4.4 = exp(3 * 10^17)\ne = 10^4.4 exp(3 * 10^17)\n\nwhere exp(x) is just e^x for e = 2.718281828459... the base of natural logarithms, but I write exp(x) because you are already using "e" for something else.
68748
uhm, ZERO!  0x2=0  what, did you fail basic math?
231306
Ashton Family, where did you learn science?  E=mc^2 is a mass to energy conversion equation (incomplete by the way) developed by Einsten.  Nothing in our universe can travel faster the the speed of light.\n\nMessages from neurons travel faster that any other means in the body.  They are electrical impulses and thus travel at slightly slower than light (the neurons have to receive and retransmit the signal).\n\nTo figure out what is correct and why it is the fastest, lets try some logic.  Assume blood flow is the fastest, it must therefore travel faster than electrical impulses.  If this was the case, you'll have friction between the bloody flowing and the veins and arteries carrying them.  Since we don't feel burning sensations in our body this must not be the case.  Thus blood flow is not the fastest.  \n\nHormone diffusion.  Hormones are carried in our blood stream.  And we've already proven that blood flow is not faster than electrical impulses, so hormone diffusion must not travel faster than blood flow, and so hormone diffusion is not the fastest.\n\nMuscle contraction.  This is the result of neuron stimulation.  If muscles could move as fast as electrical impulses, they would be moving at light speed.  Try shaking your hand back and forth as fast as possible.  If you could move your hand at light speed through the air your hands would be burned to a crisp due to the friction.  Since you are unable to perform this function, muscle stimulation is not as fast as electrical impulses and thus again we prove that muscle stimulation is not the fastest communication throughout the body.\n\nWe've eliminated all possibilities except neuron impulse transmission.  We know that this is electrical transmission and we know that it is possible for this to be transmitting at the speed of light.  Therefore this must be the fasted communication through the body.\n\nBy the way the example that someone gave, about feeling heat and jerking away from it.  The time delay is not due to neuron transmission delay.  Something has to make sense of the nerve impulses.  In our case it is our spinal column that says "hey these signals mean the hand is touching something hot!".  The spinal column is "smart" enought to know this is dangerous and says "let go".  The nerve impulses still are travelling to the brain.  The brain does a lot more analysis of the signals, and by this time, it's figured out location, distance, which fingers, how long, how hot etc etc etc, the hand has already jerked away.  And just now you are feeling how hot, it is.
872993
E=m c^2\nEnergy=Mass &#92;times (speed of light)^2
368323
E=MC2 doesn't talk about radiation.  It is about energy.  Nuclear bombs and nuclear reactors work off of the same principle.  Just in nuclear reactors, the reaction is controlled and made safe, and in bombs, the energy is released all at once.  When an atom is "split", the total mass of the origional atom and the neutron that splits it is more than the pieces that it breaks into.  That difference becomes heat energy, and the E=MC2 tells you how much energy.  The radiation that everyone associates with it comes before and after the nuclear reaction, when the nuclear fuel and daughter products (the pieces the atom split into) decay and emit various forms of radiation, depending on what is decaying.  E=MC2 doesn't talk about this part of the process, just about the moment the atom actually splits.  To reverse the process and convert energy into mass is mainly theoretical, though it is possible.  Lab conditions have achieved microscopicly small results.  This is the process that the transporters and replicators use on Star Trek.
158826
The E=mc^2 equations come from Einstein's theory of Special Relativity. Special Relativity concerns the laws of motion and observed properties when objects are travelling very close to the speed of light.\n\nSpecial relativity starts with two premises: the speed of light is constant for all observers, and the laws of physics are the same for all observers. However, observed properties are not necessarily the same.\n\nSay I flew past the Earth in a space ship travelling 99% the speed of light. To me, the space ship is normal, but the Earth would look squished, rotated, and blue with everyone moving slowly. To you, however, Earth would look normal, but the space ship would be squished, rotated, blue and with everyone moving very slowly. (This gets resolved if the space ship turns around - breaking the symmetry - to come home, and results in the famous Twins "Paradox.")\n\nIn describing the laws of motion in the context of special relativity Einstein derived that E = mc^2 -- in other words that mass has a "rest energy."\n\nIf an electron and an anti-matter electron (known as the positron) bump into each other then their is total energy conversion. The mass of two electrons is converted into energy.\n\nIn a fission or fusion bomb the the atomic process (breaking apart a heavy atom, or fusing some light atoms) results in a  much smaller conversion of mass to energy. But still a lot compared with normal explosives.
690012
the equation is as simple as the elegant and simple universe.the equation means that any type of energy can be converted into mass and vice versa. it means that at speed of light the enrgy becomes infinite(to accelerate it actually)and thus mass becomes infinite(special relativity)provided the generation of light in both the cases. the actual equation is e(kinetic energy)=mc^2/underroot(1-v^2/c^2).the e=mc^2 equation is still applicable for objects moving or stationary meaning that both the equations are true.
851776
E=mc^2\n\nwhere \n E is in joules or kg·m²/s²,\nm is in kilograms, and \nc equals speed of light, in meters/sec (approx 3*10^8)
294164
Thw formular to use here is Q = mcT where Q = quantity of heat, m = mass, c = specific heat capacity, and T is the change in the temperature, thus here Q = 2.0g*(30-25)*0.90 = 9J. Notice that I sed Joules as the unit.\n\n2.For this one, a law which i cant remember the name right now is nedeed. Here we have C(s)+O2(g)=CO2 Enthalphy -390KJ\nand also Mn(s)+O2(g)=MnO2(s) Enthalphy = -520KJ\nFor this law to be appplied, we have to write the second equation the other way to become MnO2= Mn+O2 Enthalphy = 520KJ. Notice that i changed the sign when i reversed the equation. Then O2 could be canceled out on the left side of the first equation and on the right side of the second equation. This was we are adding. Finally adding, we get MnO2(s)+C(s) = Mn + CO2 Enthalphy = -390KJ+520KJ = 130KJ.\nand thats the correct answer