Math Is Fun Forum

What do you mean?

And what a perfect example to go with it.

Bookmark: http://3.141592653589793238462643383279502884197169399375105820974944592.com/index314.html

If you do get your test back, tell me about any questions which you got wrong, and I'll post a video solution of them.

Please wait. I am raising you to the 0th floor.

(you are now undefined)

Your browser language setting is en-GB

So these are the spellings we will use:

Maths, metre, litre, colour, organisation.

UK is fine.

And if you're still having trouble, I can make a video on this problem if you like.

To my knowledge, you cannot split an electron. At least, not according to the very well established quantum theory of electromagnetism and electrons. As far as current scientific knowledge, the electron is not divisible.

By definition, nothingness can't exist. I'm pretty sure mathematics defines this well as the 'null set'.

Think of the balloon analogy for a 2-dimensional universe. The universe is on the surface of the balloon, which is expanding. Points on the balloon move away from each other as it expands. Even though the universe is expanding, it doesn't make sense to talk about motion of a centre of mass.

Neutrons by themselves are unstable and decay into a proton and electron with a half-life of about 15 min. Without protons in the right ratio, as in a nucleus, to stabilize the neutrons, your neutronium will decay away. It's only when there is enough pressure from gravity to prevent this decay that you can have stable neutronium.

Well, there are a number of different answers to this question. A 24-bit RGB computer monitor can simulate 16,777,216 colours. It works like this;

We have three 'columns' -- 0 0 0. We can add any number to these columns, i.e. if we add 127 to the first column, 61 to the second, and 39 to the third, we get 127 61 39. This represents the amount of red, green, and blue respectively. The maximum is actually 255 per column, leaving us with 256 possible combinations per column. To calculate the number of combinations, that is 256³, or, 2[sup]24[/sup], which is 16,777,216.

However, in reality, we know that, of course, 16,777,216 is not the actual number of possible colours. The visible spectrum of light means that we can see wavelengths between 380 and 740 nm (nanometres), hence why there are infinite possibilities; you can have fractional wavelengths. For example, 491.66206782365 nm could be a visible wavelength.

In terms of how many colours a human can perceive? That depends. The perception of colour varies from person to person... the number of different colors that you, as an individual, can distinguish also varies dramatically according to the conditions; it drops to zero in low light conditions, in which only the rod cells of the retina can function, as the cone cells of the retina are required for color vision. So there is no single number that applies to everyone. I believe the estimate is between 1 and 10 million.

[ Also, 0 0 0 isn't always used -- sometimes 00 00 00 - FF FF FF is used (hexadecimal). The number of combinations is still the same, because 00 in hexadecimal is 0, and FF is 255. So there are still 256³ = 16,777,216 combinations. ]

(EDIT: Sentence didn't even make sense. )