So, what does a bitcoin WEIGH?

[Carl Quesadilla]

nada.  

edit:  the price in gold??   

[tkbx]

I would argue that a bitcoin doesn't have a set weight. Even if you accurately calculated the weight of the bits of a private key in one place, it would weigh more or less on a different storage device, and that private key can hold anywhere from 0 to 21M coins.

[birr]

If it takes 2 or 3 kWh to mine a coin, it "weighs" or has mass on the order of a femtogram.
E=m*c^2
Edit:  looks like coins are even heavier than I thought.  Apparently it might take several hundred kWh to earn a coin.  So ~100 fg?

[Beans]

How much energy was used to create this thread? Can we ever get it back?

[freedomno1]

How much energy was used to create this thread? Can we ever get it back?

Unfortunately its a non-refundable product unless you control time and space 

[birr]

How much energy was used to create this thread? Can we ever get it back?

Energy conserves.
Entropy -- TO DA MOON

[Gladdy]

It weigh 630 USD now

[notbatman]

How much energy was used to create this thread? Can we ever get it back?

The answer to your second question is yes. Every point in space and time can be calculated. If you can calculate enough points within a given volume of space you can reproduce a any moment in time.

Just calculate the space this server rack occupied before OP asked his question and there you go, Bob's your uncle. This same technique could also be used to recover the empty gox server rack; it would still be empty though...

[JohnnyBTCSeed]

I'd like to cut your head off, so I can weigh it, what'd you say?

5lbs? 6lbs? 7lbs?

https://www.youtube.com/watch?v=8IrIiG5wDeY

[Taras]

How much energy was used to create this thread? Can we ever get it back?

Unfortunately its a non-refundable product unless you control time and space 

Looks like this is a job for the Doctor.

[BruceFenton]

So what you are saying is that people should definitely not delete Bitcoin in order to make the laptop lighter?

[freedomno1]

How much energy was used to create this thread? Can we ever get it back?

Unfortunately its a non-refundable product unless you control time and space 

Looks like this is a job for the Doctor.

Nice quick lets go get the Tardis ^_^

[jonald_fyookball]

OP you think too much

[Joshuar]

OP you think too much

This. xD

[acs267]

Infinity.

Bitcoin exists only digitally, much like the Internet. Could you weigh the Internet?

It's not physical or in any liquid or gaseous state. So it weighs infinity, just like the Internet.

[Dabs]

Okay. My bitcoins and altcoins all fit in one small USB flash drive. That's light.

They also fit in a single sheet of paper sealed in an envelope. That's about close to similar weight.

Of course, I've got the private keys etched or carved on to some stainless steel sheet, that's pretty heavy.

This one is pretty heavy, being that it's tungsten.

Early last year, someone engraved a private key in WIF (wallet import format) on a tungsten block.

The bank can burn down around it and it will still be readable.

https://bitcointalk.org/index.php?topic=60903.msg710662#msg710662

[Taras]

OP you think too much

This. xD

Expect more topics of me thinking too much.

[Taras]

Probably impossible to calculate.

Admittedly, this is almost certainly the case.

[bountygiver]

actually, since every node contains a copy of the block chain, you should multiply the weight by the number of nodes.

[pungopete468]

It's simple to calculate...

The net difference is 0 because data isn't stored as an electrical charge. The data is stored by the orientation of a magnetic coating on the surface of the disk. When the head energizes it simply acts as an electromagnet and changes the magnetic orientation on the face of the platter... A binary 1 is observed when the positive pole is facing the head and a 0 is when the negative pole is facing the head.

So the weight and mass of a Bitcoin is 0.