How do I feed my black hole?How to Create and Use a Black Hole Computer Drive?Would the Hawking radiation from a small black hole make a feasible propulsion source?Protect a planet against a black hole attackGenerating power using a black hole's accretion disk?Could black holes be a better source of energy than stars?Short-term Miniature black hole weapon and its effectsCan I contain and control a small black hole within a facility?Can a black hole be turned into a white hole?Could black hole civilizations even exist?
Are game port joystick buttons ever more than plain switches? Is this one just faulty?
Why does a sticker slowly peel off, but if it is pulled quickly it tears?
What is a natural problem in theory of computation?
Why is the UK so keen to remove the "backstop" when their leadership seems to think that no border will be needed in Northern Ireland?
Ordering a list of integers
Where does learning new skills fit into Agile?
Semantic difference between regular and irregular 'backen'
Can I take an upcast spell as my Mystic Arcanum?
How is linear momentum conserved in case of a freely falling body?
When one problem is added to the previous one
How to maximize the drop odds of the Essences in Diablo II?
Changing JPEG to RAW to use on Lightroom?
Redacting URLs as an email-phishing preventative?
Talk interpreter
Is first Ubuntu user root?
How many lines of code does the original TeX contain?
Filling a listlineplot with a texture
Can $! cause race conditions when used in scripts running in parallel?
Who was the most successful German spy against Great Britain in WWII, from the contemporary German perspective?
Is gzip atomic?
How to check whether a sublist exist in a huge database lists in a fast way?
Could this kind of inaccurate sacrifice be countered?
Very slow boot time and poor perfomance
How to obtain a polynomial with these conditions?
How do I feed my black hole?
How to Create and Use a Black Hole Computer Drive?Would the Hawking radiation from a small black hole make a feasible propulsion source?Protect a planet against a black hole attackGenerating power using a black hole's accretion disk?Could black holes be a better source of energy than stars?Short-term Miniature black hole weapon and its effectsCan I contain and control a small black hole within a facility?Can a black hole be turned into a white hole?Could black hole civilizations even exist?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
$begingroup$
Strange title I know, but you'll understand why quickly.
I wanted to use a black hole to create absurd amounts of power for hopefully obvious reasons (kind of useful). The problem with natural large black holes is that they tend to be heavy and produce less energy per second than small black holes (or that is what I understand, I would expect the larger surface area to mean it generates more energy but have less surface area to volume to release that energy but that doesnt seem to be the case).
The problem with small black holes is that they dissappear on you quickly due to evaporation while you get the energy. So you need to feed them. A very small black hole evaporates almost instantly in a nuclear explosion and they are tiny with swartz radius's measured at then planc scale.
In my story they use a chamber that suspends the black hole, can absorb all the energy of the black hole and convert it into power to run things and the chamber has another function, it can activate and at no energy cost can stop the black hole from evaporating in its entirety. There is no grey area here, it can only stop evaporation completely or normal evaporation occurs. This is all important for the story as part of it takes place inside the room of the black hole and the plot requires at least these things!
The question I have: what is the reasonable maximum power output I can get while feeding the black hole using this system while turning the black hole as little as possible (so you can limit the amount of black holes you need to bring along which can affect the story).
The answer has to explain the following:
how do you feed the black hole despite it expelling large amounts of energy? (Or why cant you feed it while it is active and need to turn it off to feed it)
if the black hole needs to be deactivated to be fed, how long does it need to be offline to properly feed it?
what energy output is this black hole going to give, and based on that how much material needs to be thrown in per second to keep the black hole at that size?
how do you feed the black hole based on its size?
what material would be best suited to feed the black hole? (I assume it'll be heavy elements in cases where the black hole is mere hundreds of kilo's in weight)
The best answer will have the most energy output with the least time offline (not amount of times offline, amount of total time offline). In case it is important, the method that offers the highest energy output on average over one cycle of activation, deactivation and feeding is the best answer. For clarity: highest means the most energy per second, rather than the most energy across the entire cycle.
science-based energy black-holes
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
$endgroup$
add a comment |
$begingroup$
Strange title I know, but you'll understand why quickly.
I wanted to use a black hole to create absurd amounts of power for hopefully obvious reasons (kind of useful). The problem with natural large black holes is that they tend to be heavy and produce less energy per second than small black holes (or that is what I understand, I would expect the larger surface area to mean it generates more energy but have less surface area to volume to release that energy but that doesnt seem to be the case).
The problem with small black holes is that they dissappear on you quickly due to evaporation while you get the energy. So you need to feed them. A very small black hole evaporates almost instantly in a nuclear explosion and they are tiny with swartz radius's measured at then planc scale.
In my story they use a chamber that suspends the black hole, can absorb all the energy of the black hole and convert it into power to run things and the chamber has another function, it can activate and at no energy cost can stop the black hole from evaporating in its entirety. There is no grey area here, it can only stop evaporation completely or normal evaporation occurs. This is all important for the story as part of it takes place inside the room of the black hole and the plot requires at least these things!
The question I have: what is the reasonable maximum power output I can get while feeding the black hole using this system while turning the black hole as little as possible (so you can limit the amount of black holes you need to bring along which can affect the story).
The answer has to explain the following:
how do you feed the black hole despite it expelling large amounts of energy? (Or why cant you feed it while it is active and need to turn it off to feed it)
if the black hole needs to be deactivated to be fed, how long does it need to be offline to properly feed it?
what energy output is this black hole going to give, and based on that how much material needs to be thrown in per second to keep the black hole at that size?
how do you feed the black hole based on its size?
what material would be best suited to feed the black hole? (I assume it'll be heavy elements in cases where the black hole is mere hundreds of kilo's in weight)
The best answer will have the most energy output with the least time offline (not amount of times offline, amount of total time offline). In case it is important, the method that offers the highest energy output on average over one cycle of activation, deactivation and feeding is the best answer. For clarity: highest means the most energy per second, rather than the most energy across the entire cycle.
science-based energy black-holes
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
$endgroup$
$begingroup$
Related: physics.stackexchange.com/questions/173898/…
$endgroup$
– Logan R. Kearsley
8 hours ago
add a comment |
$begingroup$
Strange title I know, but you'll understand why quickly.
I wanted to use a black hole to create absurd amounts of power for hopefully obvious reasons (kind of useful). The problem with natural large black holes is that they tend to be heavy and produce less energy per second than small black holes (or that is what I understand, I would expect the larger surface area to mean it generates more energy but have less surface area to volume to release that energy but that doesnt seem to be the case).
The problem with small black holes is that they dissappear on you quickly due to evaporation while you get the energy. So you need to feed them. A very small black hole evaporates almost instantly in a nuclear explosion and they are tiny with swartz radius's measured at then planc scale.
In my story they use a chamber that suspends the black hole, can absorb all the energy of the black hole and convert it into power to run things and the chamber has another function, it can activate and at no energy cost can stop the black hole from evaporating in its entirety. There is no grey area here, it can only stop evaporation completely or normal evaporation occurs. This is all important for the story as part of it takes place inside the room of the black hole and the plot requires at least these things!
The question I have: what is the reasonable maximum power output I can get while feeding the black hole using this system while turning the black hole as little as possible (so you can limit the amount of black holes you need to bring along which can affect the story).
The answer has to explain the following:
how do you feed the black hole despite it expelling large amounts of energy? (Or why cant you feed it while it is active and need to turn it off to feed it)
if the black hole needs to be deactivated to be fed, how long does it need to be offline to properly feed it?
what energy output is this black hole going to give, and based on that how much material needs to be thrown in per second to keep the black hole at that size?
how do you feed the black hole based on its size?
what material would be best suited to feed the black hole? (I assume it'll be heavy elements in cases where the black hole is mere hundreds of kilo's in weight)
The best answer will have the most energy output with the least time offline (not amount of times offline, amount of total time offline). In case it is important, the method that offers the highest energy output on average over one cycle of activation, deactivation and feeding is the best answer. For clarity: highest means the most energy per second, rather than the most energy across the entire cycle.
science-based energy black-holes
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
$endgroup$
Strange title I know, but you'll understand why quickly.
I wanted to use a black hole to create absurd amounts of power for hopefully obvious reasons (kind of useful). The problem with natural large black holes is that they tend to be heavy and produce less energy per second than small black holes (or that is what I understand, I would expect the larger surface area to mean it generates more energy but have less surface area to volume to release that energy but that doesnt seem to be the case).
The problem with small black holes is that they dissappear on you quickly due to evaporation while you get the energy. So you need to feed them. A very small black hole evaporates almost instantly in a nuclear explosion and they are tiny with swartz radius's measured at then planc scale.
In my story they use a chamber that suspends the black hole, can absorb all the energy of the black hole and convert it into power to run things and the chamber has another function, it can activate and at no energy cost can stop the black hole from evaporating in its entirety. There is no grey area here, it can only stop evaporation completely or normal evaporation occurs. This is all important for the story as part of it takes place inside the room of the black hole and the plot requires at least these things!
The question I have: what is the reasonable maximum power output I can get while feeding the black hole using this system while turning the black hole as little as possible (so you can limit the amount of black holes you need to bring along which can affect the story).
The answer has to explain the following:
how do you feed the black hole despite it expelling large amounts of energy? (Or why cant you feed it while it is active and need to turn it off to feed it)
if the black hole needs to be deactivated to be fed, how long does it need to be offline to properly feed it?
what energy output is this black hole going to give, and based on that how much material needs to be thrown in per second to keep the black hole at that size?
how do you feed the black hole based on its size?
what material would be best suited to feed the black hole? (I assume it'll be heavy elements in cases where the black hole is mere hundreds of kilo's in weight)
The best answer will have the most energy output with the least time offline (not amount of times offline, amount of total time offline). In case it is important, the method that offers the highest energy output on average over one cycle of activation, deactivation and feeding is the best answer. For clarity: highest means the most energy per second, rather than the most energy across the entire cycle.
science-based energy black-holes
science-based energy black-holes
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
asked 8 hours ago
DemiganDemigan
13.8k1 gold badge13 silver badges64 bronze badges
13.8k1 gold badge13 silver badges64 bronze badges
$begingroup$
Related: physics.stackexchange.com/questions/173898/…
$endgroup$
– Logan R. Kearsley
8 hours ago
add a comment |
$begingroup$
Related: physics.stackexchange.com/questions/173898/…
$endgroup$
– Logan R. Kearsley
8 hours ago
$begingroup$
Related: physics.stackexchange.com/questions/173898/…
$endgroup$
– Logan R. Kearsley
8 hours ago
$begingroup$
Related: physics.stackexchange.com/questions/173898/…
$endgroup$
– Logan R. Kearsley
8 hours ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
In practice, you may not need to feed it at all - as long as you can deal with a sufficiently hefty mini black-hole. According to wiki a black hole with mass $M$ measured in kg will have:
Power output $P = 3.56times 10^32 M^2$ Watts.
Evaporation time $T = 2.67times 10^-24 M^3$ years.
So a tidy little black hole of mass $10^11$ kg will provide you with a continuous 3.6 GigaWatts. Its evaporation time is 2700 years and it will eventually ramp up its power output, but for the first 2000 years or so the power output won't change significantly. This means that the simplest option is to just use it continuously (and leave it for your great-great-$great^120$ grand children to find a safe way to safely dispose of the remnant.
Of course you could feed it approximately 40 micrograms of matter for every second you leave it 'switched on', in which case it will effectively last forever. But the problem is that your black-hole has a diameter of approximately $1.5times 10^-16$ m, which is about 10 times smaller than a proton, so the absorption cross-section for any kind of matter will be very small. So it is not obvious that you could actually 'feed' it in any practical way - even if your chamber could hand-wavingly stop it from evaporating during the feeding process.
As well as size of the Schwartzchild radius being problematical, the radiation pressure at its surface (about $5 times10^63$ W/m^2) would definitely be a hinderance to poking matter into it, if you didn't stop it from evaporating during feeding.
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
$endgroup$
add a comment |
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "579"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fworldbuilding.stackexchange.com%2fquestions%2f153790%2fhow-do-i-feed-my-black-hole%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
In practice, you may not need to feed it at all - as long as you can deal with a sufficiently hefty mini black-hole. According to wiki a black hole with mass $M$ measured in kg will have:
Power output $P = 3.56times 10^32 M^2$ Watts.
Evaporation time $T = 2.67times 10^-24 M^3$ years.
So a tidy little black hole of mass $10^11$ kg will provide you with a continuous 3.6 GigaWatts. Its evaporation time is 2700 years and it will eventually ramp up its power output, but for the first 2000 years or so the power output won't change significantly. This means that the simplest option is to just use it continuously (and leave it for your great-great-$great^120$ grand children to find a safe way to safely dispose of the remnant.
Of course you could feed it approximately 40 micrograms of matter for every second you leave it 'switched on', in which case it will effectively last forever. But the problem is that your black-hole has a diameter of approximately $1.5times 10^-16$ m, which is about 10 times smaller than a proton, so the absorption cross-section for any kind of matter will be very small. So it is not obvious that you could actually 'feed' it in any practical way - even if your chamber could hand-wavingly stop it from evaporating during the feeding process.
As well as size of the Schwartzchild radius being problematical, the radiation pressure at its surface (about $5 times10^63$ W/m^2) would definitely be a hinderance to poking matter into it, if you didn't stop it from evaporating during feeding.
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
$endgroup$
add a comment |
$begingroup$
In practice, you may not need to feed it at all - as long as you can deal with a sufficiently hefty mini black-hole. According to wiki a black hole with mass $M$ measured in kg will have:
Power output $P = 3.56times 10^32 M^2$ Watts.
Evaporation time $T = 2.67times 10^-24 M^3$ years.
So a tidy little black hole of mass $10^11$ kg will provide you with a continuous 3.6 GigaWatts. Its evaporation time is 2700 years and it will eventually ramp up its power output, but for the first 2000 years or so the power output won't change significantly. This means that the simplest option is to just use it continuously (and leave it for your great-great-$great^120$ grand children to find a safe way to safely dispose of the remnant.
Of course you could feed it approximately 40 micrograms of matter for every second you leave it 'switched on', in which case it will effectively last forever. But the problem is that your black-hole has a diameter of approximately $1.5times 10^-16$ m, which is about 10 times smaller than a proton, so the absorption cross-section for any kind of matter will be very small. So it is not obvious that you could actually 'feed' it in any practical way - even if your chamber could hand-wavingly stop it from evaporating during the feeding process.
As well as size of the Schwartzchild radius being problematical, the radiation pressure at its surface (about $5 times10^63$ W/m^2) would definitely be a hinderance to poking matter into it, if you didn't stop it from evaporating during feeding.
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
$endgroup$
add a comment |
$begingroup$
In practice, you may not need to feed it at all - as long as you can deal with a sufficiently hefty mini black-hole. According to wiki a black hole with mass $M$ measured in kg will have:
Power output $P = 3.56times 10^32 M^2$ Watts.
Evaporation time $T = 2.67times 10^-24 M^3$ years.
So a tidy little black hole of mass $10^11$ kg will provide you with a continuous 3.6 GigaWatts. Its evaporation time is 2700 years and it will eventually ramp up its power output, but for the first 2000 years or so the power output won't change significantly. This means that the simplest option is to just use it continuously (and leave it for your great-great-$great^120$ grand children to find a safe way to safely dispose of the remnant.
Of course you could feed it approximately 40 micrograms of matter for every second you leave it 'switched on', in which case it will effectively last forever. But the problem is that your black-hole has a diameter of approximately $1.5times 10^-16$ m, which is about 10 times smaller than a proton, so the absorption cross-section for any kind of matter will be very small. So it is not obvious that you could actually 'feed' it in any practical way - even if your chamber could hand-wavingly stop it from evaporating during the feeding process.
As well as size of the Schwartzchild radius being problematical, the radiation pressure at its surface (about $5 times10^63$ W/m^2) would definitely be a hinderance to poking matter into it, if you didn't stop it from evaporating during feeding.
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
$endgroup$
In practice, you may not need to feed it at all - as long as you can deal with a sufficiently hefty mini black-hole. According to wiki a black hole with mass $M$ measured in kg will have:
Power output $P = 3.56times 10^32 M^2$ Watts.
Evaporation time $T = 2.67times 10^-24 M^3$ years.
So a tidy little black hole of mass $10^11$ kg will provide you with a continuous 3.6 GigaWatts. Its evaporation time is 2700 years and it will eventually ramp up its power output, but for the first 2000 years or so the power output won't change significantly. This means that the simplest option is to just use it continuously (and leave it for your great-great-$great^120$ grand children to find a safe way to safely dispose of the remnant.
Of course you could feed it approximately 40 micrograms of matter for every second you leave it 'switched on', in which case it will effectively last forever. But the problem is that your black-hole has a diameter of approximately $1.5times 10^-16$ m, which is about 10 times smaller than a proton, so the absorption cross-section for any kind of matter will be very small. So it is not obvious that you could actually 'feed' it in any practical way - even if your chamber could hand-wavingly stop it from evaporating during the feeding process.
As well as size of the Schwartzchild radius being problematical, the radiation pressure at its surface (about $5 times10^63$ W/m^2) would definitely be a hinderance to poking matter into it, if you didn't stop it from evaporating during feeding.
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
edited 1 hour ago
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
answered 6 hours ago
PenguinoPenguino
2,2504 silver badges13 bronze badges
2,2504 silver badges13 bronze badges
add a comment |
add a comment |
Thanks for contributing an answer to Worldbuilding Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fworldbuilding.stackexchange.com%2fquestions%2f153790%2fhow-do-i-feed-my-black-hole%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
$begingroup$
Related: physics.stackexchange.com/questions/173898/…
$endgroup$
– Logan R. Kearsley
8 hours ago