Hello again,
How does one calculate the volume an amount of matter would take up once compresse into a blackhole?
Thanks again!
More black hole calculations
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Good question, and one that is currently undergoing a lot a investigation.
The short answer is this: to my knowledge (which is a year or two old) scientists don't know.
Here's the long answer: Stephen Hawking suggests that in a black whole matter is compressed to a singulairity, a "point" of an infinetesmally small size with incredible denisty. I do not know for sure, but my understanding is that no one yet has determined how the size of the singulairty and its mass are related.
The short answer is this: to my knowledge (which is a year or two old) scientists don't know.
Here's the long answer: Stephen Hawking suggests that in a black whole matter is compressed to a singulairity, a "point" of an infinetesmally small size with incredible denisty. I do not know for sure, but my understanding is that no one yet has determined how the size of the singulairty and its mass are related.
All the best,
Terik
Terik
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blackholes
Thanks for that answer.
I think I asked that question wrong. I meant how do calcualte for example the mass of human into the "size" of a black hole. Like the event horizon or something. I actually found the answer myself so you don't need to check or anything.
It's called the schwarzchild radius: R=2Gm/c^2
G=Gravitational constant m=mass c= speed of light
I was trying to calcualte the exact blackhole radius for a human. It would be like super cramming someone into the space of an electron. Obviously an electron is super small and I don't have enough digits on my calcualtor or the computers calculator to figure this out.
Anyway thanks!
I think I asked that question wrong. I meant how do calcualte for example the mass of human into the "size" of a black hole. Like the event horizon or something. I actually found the answer myself so you don't need to check or anything.
It's called the schwarzchild radius: R=2Gm/c^2
G=Gravitational constant m=mass c= speed of light
I was trying to calcualte the exact blackhole radius for a human. It would be like super cramming someone into the space of an electron. Obviously an electron is super small and I don't have enough digits on my calcualtor or the computers calculator to figure this out.
Anyway thanks!
Re: blackholes
What do you mean you don't have enough digits? The radius of an electron seems to be unknown, but is something like 1*10^-13 or smaller. I do calculations with numbers this small (or oppositely large like 6*10^23) on calculators all the time. Use scientific notation like I did above. The answer will be in scientific notation as well. That is the whole point. No one is going to type in a zillion digits. You put in the number to the degree of accuracy you care about, which is probably only a few digits for a caculation like you are doing. (for example, c (speed of light)= 3 *10^10 cm/s or 2.998*10^10 depending on how careful you want to be.)coinjunky2 wrote:Thanks for that answer.
I think I asked that question wrong. I meant how do calcualte for example the mass of human into the "size" of a black hole. Like the event horizon or something. I actually found the answer myself so you don't need to check or anything.
It's called the schwarzchild radius: R=2Gm/c^2
G=Gravitational constant m=mass c= speed of light
I was trying to calcualte the exact blackhole radius for a human. It would be like super cramming someone into the space of an electron. Obviously an electron is super small and I don't have enough digits on my calcualtor or the computers calculator to figure this out.
Anyway thanks!
Louise
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Oh, but I do have a math question that I'd be forever grateful if someone helps me out with. What does the math symbol "e" used for? Not E as in energy, but e. I've encoutered this symbol with larger numbers. Why can't they just use scientific notation? Why do they have to throw in another symbol to confuse me?
Well, e can mean a couple of things. In the number 3e10, it is the same as 3*10^10. I guess it comes from "e"xponent- you should use whatever comes after the e as the exponent of 10. It can also refer to a special number "e", which is used in a lot of formulas. See:coinjunky2 wrote:Oh, but I do have a math question that I'd be forever grateful if someone helps me out with. What does the math symbol "e" used for? Not E as in energy, but e. I've encoutered this symbol with larger numbers. Why can't they just use scientific notation? Why do they have to throw in another symbol to confuse me?
http://en.wikipedia.org/wiki/E_(mathematical_constant)
Some calculators (most?) use e instead of *10^whatever, since it takes up fewer digits on the screen.
Louise
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