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# What does e equal?

# How do you use e equals mc2?

The formula E=mc2 shows that matter and energy are interrelated, matter can be converted into energy and energy can be converted into mass. E=mc2 Where: E is Energy …in Joules (J) m is mass in kilograms (kg) c is the speed of light in meters per second (ms-1) which is 3.0x108 ms-1 c2 = 3.0x108 x 3.0x108 = 9.0x1016 The simplest way to show how to use the formula is to give some examples. Example 1 - Burning Coal If we burn 1 tonne of coal then about 36GJ of energy is released. Rearranging the equation E=mc2 we get m=E/c2 so m = 3.6x107/9x1016 = 4x10-10kg = 0.4ÎĽg If we weigh the coal and air before burning and the ash and air after burning we would find that the stuff remaining afterwards would be 0.4ÎĽg lighter than what we started with. Obviously it would be impossible to measure a change of 0.4ÎĽg in 1 tonne of coal and about 10 tonnes of air but with more energetic reactions and very sensitive equipment it has been shown to be true for chemical reactions. Example 2 - Fission of Uranium-238 The results are more useful in nuclear reactions, during the fission of 1kg of Uranium-235 about 6.7x1010J of energy is released. Using the equation m=E/c2 as we did in example 1 we get m=6.7x1010/9x1016 = 7.4x10-7kg = 0.74mg. A loss of mass of about 0.000074%, small but definitely measurable. Example 3 - Total conversion of matter If we were able to convert 1kg of mass completely into energy (the only way currently known how to do this is to have antimatter to collide with matter but the amounts produced with our current technology have not exceeded a couple hundred of atoms) then the energy released can be calculated using E=mc2. E = 1 x 9x1016 = 9x1016J. Example 4 - Providing all human energy requirement using matter conversion Finally, in 2005 the Earth's total energy use was 5x1020J. If it were possible to convert matter fully into energy then we can calculate how much mass would be required. m=E/c2 so m=5x1020/9x1016 = 5500kg. The total annual energy requirement of human kind could be provided from just 5.5 tonnes of matter. Its a pity it can't be done........ Notes on limitations of data used above * The figure of 6.7x1010J/kg for Uranium-238 is not very accurate, I estimated it from data in the Encarta link below, it is good enough for an illustration here but I would not suggest using it elsewhere. * See reservations in Wikipedia source link about total energy use of human kind.

# What does E equal to?

e=mc2

# What is E equal to?

E=MC2 E means energy produced.

# Is e equals mc2 calculus?

No. It's physics.

# What is e in e equals mcsquared?

energy (e) equals mass (m) times the square of the speed of light (c2)

# What is e in e equals mc2?

E=mc2 means energy=mass multiplied by the speed of light squared.

# What does c equal if E equals mc2?

In the equation E=mc2 'c' is equal to the speed of light (in a vacuum) or 2.997*108. or... 186282.397 miles per second 670616629 miles per hour Or if you're metric 1….07925285 Ă— 109 kph 299792458 metres per second * * * * * Actually, the equation "works" only in SI units. With any other units you will need to introduce a constant which is based on the units used.

# E equals mc2 significance of equal?

This formula shows that matter is just a form of energy; one can convert mass into energy and vice versa.

# Who immortalized E equals MC2?

Einstein

# Why e equals mc2 is necessary?

e=mc2 is a constant. so you can use it in a variety of equations without having to do all the math up to that point. basically it helps us measure astronomical numbers. -- (se…e: avigadro's number for a similar constant with a similar kind of use.) e=mc2 means this: energy is the same as mass multiplied by the speed of light times the speed of light. this would be a huge number - so it's shortened by saying e=mc2. it's a nickname!!

# What is Einstein's E equals mc2?

e=mc^2 pretty much is a relation between mass (m) and energy (e) where c = speed of light. Pretty much, as something goes faster, it gains slightly more mass. It really has no… visible effect when you're going like 60 mph, but when you go the speed of light the mass becomes almost infinite. We would have to generate an infinite amount of energy to propel this thing (which is pretty much impossible) so we can never really go the speed of light. Light travels at the top speed in the universe, but it's still finite. The equation ends up being: (c=mc^2) divide by c so that (1=mc) so the mass is very small.

# When did he discover E equals mc2?

Albert Einstein developed energy is equal to mass times the speed of light squared in 1905 whilst pondering light.

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# Who is famous for the for E equals mc2?

Albert Einstien - it's his theory of relativity

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In Algebra

# What is E equals MC2 short for?

it's Einstein's theory of relativity... Energy = Mass times the speed of light squared.

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In Algebra

# What does E equal in algebra?

E equals whatever you need it to to fit the equation.... for instance....3E=9....9/3=E.....E=3.. I'm only 12 so don't make fun of my answer..

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In Science

# How many meters does e equals?

I am going to assume that you are referring to the formula "e = mc^2" in this case e is not a distance, but stands for energy. In the formula m stands for mass and c stands f…or the speed of light squared. This means that the total energy in anything is the mass of the object times the speed of light squared.

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# Is E equals MCÂ˛ true?

If you're talking about the mass/energy equivalence that arises out of Einstein's Relativity, it's been verified in thousands of experiments over the past 70 years. No seri…ous question remains, and it's one of the relatively few 'theories' that have graduated to the status of 'law'.