Math Problem

puckmymuskie

If I weigh 85 kilos and I gain 10% every year, how long until I weigh the same as all the mass of the known Universe?

Universe being 1.5*10^53 kg

eamonnq

Friday

Mr. FoggPatches

Rugby forum ->

Fr_Dougal

Just weight your birth giver.

munster87

You've a problem alright

Winterlong

Your biggest problem is not how long you would need to wait to get that big, but how would you weigh yourself? The bathroom scales in my house only goes to 24 stone.
Not to mention that at that size -light and time would not be as they are now so what you 'see' on your mega bathroom scales would not reflect what weight you are at that moment in time, relatively.
And you would have your own gravitational field too further distorting things.

bonzodog2

Eat less cake OP!

Gileadi

Give or take 1312.5 years

jimgoose

There's no point in asking this because it is physically impossible. In order to keep gaining weight like that over the kind of time period involved, you would need to consume and metabolise an incredible amount of matter, thus altering the mass of the Universe continuously as you went along. The best you could do is estimate the weight you'd be at that point where it was equal to the Universe's remaining mass, and that would pull in several other factors such as your metabolic rate and efficiency, how often you take a megadump (jokes about Black Holes should be inserted here) and so forth. After thus eating all the pies, as 'twere, in the astronomical sense, you would become what astronomers call a Fat Giant.

soiaf

1238 years.

But you are the universe at that stage ;-)

keano_afc

Math?

This is Ireland, Sean. Not America.

jimgoose

soiaf wrote: »

1238 years.

But you are the universe at that stage ;-)

https://i.ytimg.com/vi/HhG3JjYaHX8/hqdefault.jpg

The Backwards Man

Imagine the size of the calculator you would need so your fingers wouldn't mash the buttons.

tritium

jimgoose wrote: »

There's no point in asking this because it is physically impossible. In order to keep gaining weight like that over the kind of time period involved, you would need to consume and metabolise an incredible amount of matter, thus altering the mass of the Universe continuously as you went along. The best you could do is estimate the weight you'd be at that point where it was equal to the Universe's remaining mass, and that would pull in several other factors such as your metabolic rate and efficiency, how often you take a megadump (jokes about Black Holes should be inserted here) and so forth. After thus eating all the pies, as 'twere, in the astronomical sense, you would become what astronomers call a Fat Giant.

However if we assume that you are what you eat and therefore take on mass equivalent to what you consume (this also relies on the zero time dump, or "ghost ****" assumption) then we can solve for equilibrium at half the mass of the universe and get 1230.78 years

jimgoose

tritium wrote: »

However if we assume that you are what you eat and therefore take on mass equivalent to what you consume (this also relies on the zero time dump, or "ghost ****" assumption) then we can solve for equilibrium at half the mass of the universe and get 1230.78 years

That's so grossly oversimplified as to be next to useless. Typical Pure mathematician - all Pan-Galactic Fat Bastards are spherical! :pac:

tritium

jimgoose wrote: »

That's so grossly oversimplified as to be next to useless. Typical Pure mathematician - all Pan-Galactic Fat Bastards are spherical! :pac:

Im not actually sure how this one would be useful regardless of the degree of complexity applied:)

Maximus Alexander

That's not a maths problem, that's an eating problem.

Mr. CooL ICE

Depends. Do you lift? If yes, the answer will be different because 10kg of muscle is heavier than 10kg of fat

<insert trollface here>

Estrellita

I thought it said 'meth problem'. This world has broken me.

tritium

jimgoose wrote: »

That's so grossly oversimplified as to be next to useless. Typical Pure mathematician - all Pan-Galactic Fat Bastards are spherical! :pac:

In your final year you'd be eating 8x10^49 kilos, or an average of 2.5x10^42 kilos per second. The mass of the sun is 2x10^30. So in an expanding universe with mass being consumed youd need to travel faster than light to do this! (Math may be a little off)

Aha, ive found the flaw in the OPs plan :pac:

Maximus Alexander

tritium wrote: »

In your final year you'd be eating 8x10^49 kilos, or an average of 2.5x10^42 kilos per second. The mass of the sun is 2x10^30. So in an expanding universe with mass being consumed youd need to travel faster than light to do this! (Math may be a little off)

Aha, ive found the flaw in the OPs plan :pac:

Is that correct though? The expansion of the universe does not apply to gravitationally bound objects. In his penultimate year, would the OP be a sufficiently massive black hole to gravitationally bind the entire observable universe and counteract its expansion?

tritium

Maximus Alexander wrote: »

Is that correct though? The expansion of the universe does not apply to gravitationally bound objects. In his penultimate year, would the OP be a sufficiently massive black hole to gravitationally bind the entire observable universe and counteract its expansion?

Ah but they still have to consume the (extremely distant) matter. Given they have to consume 10^12 times the mass of the sun per second, that mass going to have to get to them very quickly.

We could of course use wormholes here, and given the oddness of the whole thread, why the hell not

MilesMorales1

What's math? I only know maths.

Maximus Alexander

tritium wrote: »

Ah but they still have to consume the (extremely distant) matter. Given they have to consume 10^12 times the mass of the sun per second, that mass going to have to get to them very quickly.

We could of course use wormholes here, and given the oddness of the whole thread, why the hell not

Realistically it probably becomes physically impossible for him to continue expanding at that rate once he consumes the solar system. But that's boring. :pac: And it sounds like he's hungry enough to find a way!

blue note

puckmymuskie wrote: »

If I weigh 85 kilos and I gain 10% every year, how long until I weigh the same as all the mass of the known Universe?

Universe being 1.5*10^53 kg

Why don't you ask your mom how long it took?

tritium

Maximus Alexander wrote: »

Realistically it probably becomes physically impossible for him to continue expanding at that rate once he consumes the solar system. But that's boring. :pac: And it sounds like he's hungry enough to find a way!

Dont forget that after 1200 odd years the OP is unlikely to still have their own teeth. Therefore a blender of galactic porportions will also be required.

Hammer89

If and when you want to lose that weight, ask for help on here and you'll get Boards' resident experts on weight problems. "It's a scientific fact that if you eat less and move more you'll lose weight. Simples. Good luck bro."

ToddyDoody

You'd earn a fortune winning all those biggest double chin contests.

Mr. FoggPatches

blue note wrote: »

Why don't you ask your mom how long it took?

Burrrrn!!!!

Maximus Alexander

Hammer89 wrote: »

If and when you want to lose that weight, ask for help on here and you'll get Boards' resident experts on weight problems. "It's a scientific fact that if you eat less and move more you'll lose weight. Simples. Good luck bro."

Once he's finished consuming the solar system he'll have nothing left to eat and will be orbiting the galactic core at about 220km/s, so he'll be eating nothing and moving a lot. The kilos will fly off him.

jimgoose

tritium wrote: »

Dont forget that after 1200 odd years the OP is unlikely to still have their own teeth. Therefore a blender of galactic porportions will also be required.

Supermassive black holes are nature's blenders. All the OP has to do is swing by a few large galactic centres (by the time he's big enough to require this sort of thing some millions of years will have passed and he'll have evolved into a diffuse and extremely fat form of pure and freely-mobile intellect) and absorb several billion old galaxies in the form of gamma bursts. His own personal gamma bursts will be quite impressive in this and subsequent phases also.

jimgoose

Maximus Alexander wrote: »

Once he's finished consuming the solar system he'll have nothing left to eat and will be orbiting the galactic core at about 220km/s, so he'll be eating nothing and moving a lot. The kilos will fly off him.

Orbit is infinite free-fall so expends little or no energy. One good gamma burst will blast him out of that and on course to devour the next galaxy. Really, can we do something about the meathead gym-gowls like Maximus in this thread? This is the Big Leagues, boy!!

Maximus Alexander

jimgoose wrote: »

Orbit is infinite free-fall so expends little or no energy. One good gamma burst will blast him out of that and on course to devour the next galaxy. Really, can we do something about the meathead gym-gowls like Maximus in this thread? This is the Big Leagues, boy!!

I dunno, the fusion taking place in his core at that stage will be a pretty hefty workout. He'll be sweating a lot of solar wind!

jimgoose

Maximus Alexander wrote: »

I dunno, the fusion taking place in his core at that stage will be a pretty hefty workout. He'll be sweating a lot of solar wind!

At that point you're talking hydrogen fusion. The energy produced will be many times that thrown off via radiation. He'll have several billion years to make an intergalactic pig of himself before the helium fusion/Red Giant phase and he ends up suddenly several times his normal size - as if that wasn't bad enough - with his head down a quasar puking like a Cosmic Elvis.

Capt'n Midnight

puckmymuskie wrote: »

If I weigh 85 kilos and I gain 10% every year, how long until I weigh the same as all the mass of the known Universe?

Universe being 1.5*10^53 kg

That's a tough one all right.

The problem being that if you keep putting on weight then you will soon have a gravitational attraction of your own and your weight will increase faster than your mass. A 1Kg mass on Jupiter would weigh over 2.5Kg


If you want to calculate your surface gravity use this
http://nova.stanford.edu/projects/mod-x/ad-surfgrav.html
assume a density of 1,000Kg/m3, well at first. Later on you would have to take into account compression and electron repulsion and so on. And then when you hit 1.3 solar masses you are into the CNO cycle because Carbon-Nitrogen-Oxygen is what you are mostly made of.

But when you get to about 3.8 Solar masses it's game over. Because you become so massive you'd become a black hole. Because you are now a singularity your radius is zero (or damn close to) so your surface gravity would be infinite. Also because of the event horizon you would now comprise the totality of your observable universe, and I'm calling that the "known universe" regardless of information falling into the hole. But time would stop too. So the question of how long would it take for you to weigh the same as the known universe involves infinities divided by zero, like I said a tough question.

Pedro K

Ignoring the physics and just doing the maths, it's a Malthusian model.

P(t)=Po exp(rt)

Po = 85 kg
P(t) = 1*10^53 kg
r= 10%= (.10)
t= ?

Solve for t.

Ln(P(t)/Po) / r= t

So about 1175.94 years..... I think.

Yeah, I'm a nerd.

jimgoose

Pedro K wrote: »

Ignoring the physics and just doing the maths...

Oh for FCUK sake!!!

Pedro K

jimgoose wrote: »

Oh for FCUK sake!!!

I think this lad has a lot on his plate already, without worrying about the physics!

Skylinehead

MilesMorales1 wrote: »

What's math? I only know maths.

The singular, duh.

If you only do one Leaving Cert question you did a math.

Archeron

If you're eating with your kids, be sure to give them a child sized galaxy, not an adult one. Together we can tackle obesity!

LordSutch

puckmymuskie wrote: »

Math problem

Math?

puckmymuskie wrote: »

If I weigh 85 kilos and I gain 10% every year, how long until I weigh the same as all the mass of the known Universe?

Universe being 1.5*10^53 kg

I dunno man, but may I suggest you need jog to work on the sidewalk instead of commuting by automobile or greyhound. Stop consuming so many high calorific Tacos & milk shakes, then put them there dimes back in your fanny pack and stop spending so much time in the Movie Theatre!
Pull up your pants dude, break into a sweat, and lose some fat on your jive ass fanny-butt, man....
https://upload.wikimedia.org/wikipedia/en/thumb/a/a4/Flag_of_the_United_States.svg/300px-Flag_of_the_United_States.svg.png

Hubba hubba.

For ever odd

puckmymuskie wrote: »

If I weigh 85 kilos and I gain 10% every year, how long until I weigh the same as all the mass of the known Universe?

Universe being 1.5*10^53 kg

Assume it has already been done, and the entity that did it got bored and decided to lose 10% per year until "it" got down to 85 kilos. At the halfway point, each Should be the same size and unavoidable.
Then you say "hey there, I've seen you around - your looking well, have you lost a bit weight?"
(insert pleasantries here) ... "Really, and how long did that take?"

Every action has an equal and opposite reaction...?

matchthis

Take a short cut and eat loads of Milky Way bars and it'll take 2 weeks..... and it won't spoil yer dinner

bonzodog2

LordSutch wrote: »

Math?



I dunno man, but may I suggest you need jog to work on the sidewalk instead of commuting by automobile or greyhound. Stop consuming so many high calorific Tacos & milk shakes, then put them there dimes back in your fanny pack and stop spending so much time in the Movie TheatreTheater!
Pull up your pants dude, break into a sweat, and lose some fat on your jive ass fanny-butt, man....
https://upload.wikimedia.org/wikipedia/en/thumb/a/a4/Flag_of_the_United_States.svg/300px-Flag_of_the_United_States.svg.png

Hubba hubba.

FYP. Dude.
Hubba hubba.:rolleyes:

LordSutch

Hey Bonzo, spelling mistakes aside, what do you say?

Math or Maths?

Ted111

Weight or mass?

Skylinehead

Ted111 wrote: »

Weight or mass?

Not the same thing!

Mr. FoggPatches

Ted111 wrote: »

Weight or mass?

You say tomato,

I say derivative of force with respect to acceleration.

learn_more

puckmymuskie wrote: »

If I weigh 85 kilos and I gain 10% every year, how long until I weigh the same as all the mass of the known Universe?

Universe being 1.5*10^53 kg

That weight (fat) you 'put on' is made of atoms you've consumed. They are not 'new atoms'. You've just transferred atoms from one part of the universe to another, namely, to your belly.

So, the mass of the universe will remain exactly the same as it is, and there is no 'you' getting bigger independent of the mass of the universe.

Your Face

Its all relative.

greenflash

keano_afc wrote: »

Math?

This is Ireland, Sean. Not America.

What does afc stand for? This is Ireland, Keano, not North London.