Imagine if Earth was suddenly converted to energy via emc2 just on time for xmas and holiday season, it would shine almost as mini-star or something like that, surely so?

English translation: Energy = mass * light speed constant squared

Formula: E = m * c ^ 2

Equation with Earth's mass: 5972200000000000000000000*299792458^2=5.367545678×10^41

1 hour ago, tylers100 said:

Imagine if Earth was suddenly converted to energy via emc2 just on time for xmas and holiday season, it would shine almost as mini-star or something like that, surely so?

English translation: Energy = mass * light speed constant squared

Formula: E = m * c ^ 2

Equation with Earth's mass: 5972200000000000000000000*299792458^2=5.367545678×10^41

E=mc2 is not about converting mass into energy.

It says mass is a form of energy, but does not say that it can necessarily be converted to another form.

3 hours ago, tylers100 said:

Equation with Earth's mass: 5972200000000000000000000*299792458^2=5.367545678×10^41

1: Where are the units?

2: Why are there all those zeroes for the mass but the energy is given in scientific notation?

3: Why is the energy given to ten significant figures when the mass is only given to five?

4 hours ago, KJW said:

1: Where are the units?

2: Why are there all those zeroes for the mass but the energy is given in scientific notation?

3: Why is the energy given to ten significant figures when the mass is only given to five?

1. Formula: E = mass * c ^ 2

2. Looked up the mass and light speed constant information on Google search.

3. Equation with units specified: E = 5,972,200,000,000,000,000,000,000 mass * 299,792,458 metres per second ^ 2

4. Equation entered into the calculator software I used, and it automatically returned with result (I was in the basic mode, not advanced, yet it still returned with scientific notation.. maybe a software bug?): 5972200000000000000000000*299792458^2=5.367545678×10^41

5. TBH, I wanted non-scientific notation result but the calculator I used on my computer is the only one calculator I used at this moment and it returned with exponent to powers which I don't really know how to read. Also, I didn't know that the emc2 didn't mean it can convert energy to mass meaning it only show how much energy joules there are in mass.

6. I was probably in good mood when posting this thread and guess I was in xmas / holidays spirit season to speak, but now.. sorry, I probably shouldn't had jumped ahead with this thread without properly knowing how to express in scientific way. After all, this forums is science.

Edited Sunday at 04:07 AM3 days by tylers100
Edited list number.

19 minutes ago, tylers100 said:

1. Formula: E = mass * c ^ 2

2. Looked up the mass and light speed constant information on Google search.

3. Equation with units specified: E = 5,972,200,000,000,000,000,000,000 mass * 299,792,458 metres per second ^ 2

4. Equation entered into the calculator software I used, and it automatically returned with result (I was in the basic mode, not advanced, yet it still returned with scientific notation.. maybe a software bug?): 5972200000000000000000000*299792458^2=5.367545678×10^41

5. TBH, I wanted non-scientific notation result but the calculator I used on my computer is the only one calculator I used at this moment and it returned with exponent to powers which I don't really know how to read. Also, I didn't know that the emc2 didn't mean it can convert energy to mass meaning it only show how much energy joules there are in mass.

6. I was probably in good mood when posting this thread and guess I was in xmas / holidays spirit season to speak, but now.. sorry, I probably shouldn't had jumped ahead with this thread without properly knowing how to express in scientific way. After all, this forums is science.

Ok. There's no harm in admitting a lack of knowledge. Perhaps I was being harsh in expecting skills you genuinely do not have, especially given the festive spirit of the thread. I apologise.

However, the questions I asked are legitimate:

1: Whenever you supply numbers to a formula, those numbers have units which should also be shown. Otherwise, how are we to know that the speed is in metres per second and not (say) miles per hour. Same applies to units of mass and energy.

2: It seems odd to specify a number as "5972200000000000000000000" instead of 5.9722 x 10^24 when you've already specified a number as 5.367545678 x 10^41. Also, the speed of light is 2.99792458 x 10^8 m/s when expressed in scientific notation.

3: This is about the accuracy of the numbers in the calculation. The accuracy of the final result is no greater than the least accurate number in the calculation. In your calculation, the least accurate number is the mass 5.9722 x 10^24 with only five significant figures. Therefore, the accuracy of the result (energy) is no greater than five significant figures. That is, 5.3675 x 10^41. The extra digits you supplied are just meaningless noise. It's obvious that you had just taken the number straight from a calculator.

Edited Sunday at 05:08 AM3 days by KJW