cavalierzee:

How Long Is A Spoonful Of Water?
I can’t quite remember how the teaspoon question arose except to recall that it came up in conversation with my son, a physics student.
 

First let me clarify the question. To state it more precisely: if you took all the molecules in a teaspoon of water and laid them end to end, how far would that thin aqueous line stretch? 
The first step is to figure out how many water molecules we have. 
A typical teaspoon holds about 5 millilitres (mL), which weights 5 grams. To find out how many water molecules there are in 5 grams you need to know that the molecular weight of water is 18 — the sum of the weights of one oxygen atom (16) and two hydrogen atoms (1 a piece) in H2O. What that means is 18 grams of water contains one mole of water molecules. Students of chemistry also know the mole to be a defined number of atoms or molecules (which relates the arbitrarily set scale of atomic weights — hydrogen = 1, helium = 2, and so on — to the actual weights of atoms in grams). It’s rather big: one mole is 6.022 x 1023 in scientific notation. That’s

602,200,000,000,000,000,000,000
So in 5 grams of water there would be 5/18ths of this number which is:

167,300,000,000,000,000,000,000
In other words: a lot.
But water molecules are very small; each one is only about 0.3 nanometers wide. That’s 0.0003 micrometres, or 0.0000003 millimetres or 0.0000000003 metres. These are bizarre numbers — we have no real experience of them so it’s hard to get much sense of scale. But let’s plough on anyway.
If we lay down 167,300,000,000,000,000,000,000 water molecules end to end, the total length of the line is:

167,300,000,000,000,000,000,000 molecules x 0.0000000003 metres per molecule.
Which is 50,190,000,000,000 metres.
Or 50,190,000,000 km (that’s 31,368,750,000 miles for older readers).
Which is 50 billion km. (How good was your guess?)
That’s over 10 times the width of the solar system. From a teaspoon. 
Just think how far you could go with a bucket of water. 
Stephen Curry is a Professor of Structural Biology at Imperial College.

cavalierzee:

How Long Is A Spoonful Of Water?

I can’t quite remember how the teaspoon question arose except to recall that it came up in conversation with my son, a physics student.
 
First let me clarify the question. To state it more precisely: if you took all the molecules in a teaspoon of water and laid them end to end, how far would that thin aqueous line stretch? 
The first step is to figure out how many water molecules we have. 
A typical teaspoon holds about 5 millilitres (mL), which weights 5 grams. To find out how many water molecules there are in 5 grams you need to know that the molecular weight of water is 18 — the sum of the weights of one oxygen atom (16) and two hydrogen atoms (1 a piece) in H2O. What that means is 18 grams of water contains one mole of water molecules. Students of chemistry also know the mole to be a defined number of atoms or molecules (which relates the arbitrarily set scale of atomic weights — hydrogen = 1, helium = 2, and so on — to the actual weights of atoms in grams). It’s rather big: one mole is 6.022 x 1023 in scientific notation. That’s
602,200,000,000,000,000,000,000
So in 5 grams of water there would be 5/18ths of this number which is:
167,300,000,000,000,000,000,000
In other words: a lot.
But water molecules are very small; each one is only about 0.3 nanometers wide. That’s 0.0003 micrometres, or 0.0000003 millimetres or 0.0000000003 metres. These are bizarre numbers — we have no real experience of them so it’s hard to get much sense of scale. But let’s plough on anyway.
If we lay down 167,300,000,000,000,000,000,000 water molecules end to end, the total length of the line is:
167,300,000,000,000,000,000,000 molecules x 0.0000000003 metres per molecule.
Which is 50,190,000,000,000 metres.
Or 50,190,000,000 km (that’s 31,368,750,000 miles for older readers).
Which is 50 billion km. (How good was your guess?)
That’s over 10 times the width of the solar system. From a teaspoon.
Just think how far you could go with a bucket of water. 
Stephen Curry is a Professor of Structural Biology at Imperial College.

(via imathematicus)


itsstuckyinmyhead:

School and Tumblr photoset

(via right-your-life)



spaceplasma:

Planets of Our Solar System

Our solar system officially has eight planets and one star: the Sun. The discovery of an object larger than Pluto in 2005 rekindled the debate over whether such objects, belonging to the Kuiper Belt – a collection of icy bodies located beyond Neptune – should be called planets. Pluto and other large members of the Kuiper Belt are now considered “dwarf planets.”

Planet facts: space-facts.com

(via quantumaniac)


compoundchem:

Today’s graphic looks at the 20 common amino acids that are combined to make up the proteins in our bodies. It also gives the three-letter and one-letter codes for each, as well as denoting whether they are ‘essential’ or ‘non-essential’.Read more information & grab the PDF here: http://wp.me/p4aPLT-tu

compoundchem:

Today’s graphic looks at the 20 common amino acids that are combined to make up the proteins in our bodies. It also gives the three-letter and one-letter codes for each, as well as denoting whether they are ‘essential’ or ‘non-essential’.

Read more information & grab the PDF here: http://wp.me/p4aPLT-tu

(via we-are-star-stuff)


themajesticmountainscold:

moffats-army:

theuppitynegras:

siuilaruin:

aria-brook:

gentlenight:

wallflowersperk:

penchant-for-raising-cain:

“You fight like a girl.”

I’m sorry

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I didn’t

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realise

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that 

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was 

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a

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bad

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thing

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Reblogging because I’m sure the comic readers out there could add some more.

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yeah

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so sorry

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i can’t hear you

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over the sound

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of me crushing my enemies

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This list

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was looking

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a little

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white

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so here you go

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watch tha

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bodies hit

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tha floor

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this is the best post on tumblr, hands down

(via cuddlybetch)


manybodies:

lightspeedsound:

lunapics:

theshells:

I can’t stop laughing at Harry running the fuck awaythe boy who lived ladies and gentlemen.

….You realize, of course, that Hermione Granger lit a teacher on fire when she was eleven, and kept a person alive in a jar for a year when she was fourteen, and studies dark and forbidden magics for kicks, and is one of the brightest and strongest witches of her era. If she came at me, even wandless, I would aparate to Neptune to get away from her.

Hermione Granger also: 

  • punched Draco Malfoy in the nose for being an idiot 
  • purposefully performed a confundus charm on whatshsface WHILE HE WAS FLYING just so Ron would win (omfg that is so fucking dangerous) 
  • literally pulled a fucking Bourne Identity on her parents and managed to set them up in fucking Australia (jesus christ she literally made it so that she NEVER EXISTED wtf that’s so fucking 007)
  • Convinced the Ministry of Magic to give her an incredibly dangerous and volatile device that allowed her to ALTER TIMELINES COMPLETELY (just because she was so smart, literally, that is the reason, her “potential”) 
  • Has enough basic survival skills and badass magic to literally disappear to the middle of nowhere and flourish AND figure out Voldemort’s plot with Harry 
  • Hermione also figures out not only what Voldemort’s plan is, but generally how to beat it, WAY BEFORE VOLDEMORT EVER DOES. Why? because she is just that much smarter and better at magic than everybody else

in conclusion: Voldemort wishes he could be as awesome as Hermione, that’s why he wants to kill her so bad. 

Can we rehave this series with hermione as the protagonist. 

(via cuddlybetch)


thisragingpeace:

cassiel-the-loyal:

rpgmaker:

thatbatterisaspy:

hairandbeardkommando:

punks not dead

Heosemys spinosa is an endangered species. 

punks almost dead

That is not a Heosemys Spinosa,its a Graptemys nigrinoda. 
they are in the low risk list, therefore, not endangered.

Punks not as almost dead as we thought.

thisragingpeace:

cassiel-the-loyal:

rpgmaker:

thatbatterisaspy:

hairandbeardkommando:

punks not dead

Heosemys spinosa is an endangered species.

punks almost dead

That is not a Heosemys Spinosa,its a Graptemys nigrinoda.

they are in the low risk list, therefore, not endangered.

Punks not as almost dead as we thought.

(via right-your-life)


egoting:

yoncehaunted:

*SHOUTING TO THE HEAVENS*

This was a fucking rollercoaster

(via right-your-life)


theworldwontspinforever:

hold-a-lover-close:

owlturdcomix:

We go forward.

This is too deep to comprehend.

This fucked me up.

(via right-your-life)


(via doctorwho)


I dreamed of being an orphan, but as usual Father said “no.”
Tyrion Lannister, A Game of Thrones (via incorrectgotquotes)

scienceisbeauty:

Learning maths concepts using gifs.

Via Functionspace



Cosmos: A Personal Voyage | Cosmos: A Spacetime Odyssey

(via child-of-thecosmos)