SAMS

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Sun, 10 Sep 2017 16:00:20 +1000

ri-science: A potassium volcano experiment from 1812 This...

Sun, 10 Sep 2017 08:00:22 +1000

A potassium volcano experiment from 1812

This demonstration, performed for a packed lecture theatre at the Royal Institution in 1812 by Sir Humphry Davy, one of history’s greatest scientists, was a guess at what causes the force of a volcanic eruption.

Pieces of potassium are nestled in the bottom of the volcano. When water is added, the result is immense due to the highly reactive nature of potassium, which Davy himself had discovered just a few years before.

These chemical reactions aren’t really what sparks volcanic eruptions, but the beauty and drama of Davy’s demonstrations of natural phenomena, which very few of the audience would’ve seen before, helped build his reputation as one of the most brilliant lecturers of the day.

Sign up to the free online course from the University of Lancaster and Future Learn to learn more about Davy, his discoveries and his life as a poet.

lil-hooves: A Stag Beetle for Thursday! (Low key inspired by...

Sat, 09 Sep 2017 16:00:30 +1000

lil-hooves:

A Stag Beetle for Thursday!

(Low key inspired by all the beetle hunting I’ve been doing in Animal Crossing)

scienceshenanigans: thatsnotwatyourmomsaid: blaineandersasss: kpopcrackchat: burqini: Chemistry...

Sat, 09 Sep 2017 08:00:33 +1000

scienceshenanigans:

thatsnotwatyourmomsaid:

blaineandersasss:

kpopcrackchat:

burqini:

Chemistry more like cheMYSTERY because i have no idea what’s going on

Calculus more like calKILLus because a piece of my sanity dies with every equation

Biology more like BYEology because I’m out

math more like no

Toxicology more like EVERYTHING WILL KILL YOU LIFE IS FUTILE JUST HAVE THE ICE CREAM

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Fri, 08 Sep 2017 16:00:18 +1000

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Fri, 08 Sep 2017 08:00:27 +1000

mautlyn: teamrocketing: i’m so glad i live in 2016 so i dont...

Thu, 07 Sep 2017 16:00:08 +1000

mautlyn:

teamrocketing:

i’m so glad i live in 2016 so i dont have to deal with these massive terrifying animals except the blue whale, but shes gentle and good

wait is it really called Hell Pig

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Thu, 07 Sep 2017 08:00:13 +1000

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Wed, 06 Sep 2017 16:00:30 +1000

sciencealert: Gothite is normally black and dull, but...

Wed, 06 Sep 2017 08:00:38 +1000

sciencealert:

Gothite is normally black and dull, but occasionally it looks iridescent. This one is from Graves Mountain, in Georgia. So beautiful! 😍😍 📷: jewels-fine-minerals/Ebay #science #georgia #minerals #iridescent #gothite #sciencealert http://ift.tt/2vxx6N4

cincylibrary:Fox-coloured Sparrow, from Audubon’s Birds of...

Tue, 05 Sep 2017 16:00:16 +1000

cincylibrary:

Fox-coloured Sparrow, from Audubon’s Birds of America.

wapiti3: A monograph of the pheasants By Beebe, William,...

Tue, 05 Sep 2017 08:00:17 +1000

wapiti3:

A monograph of the pheasants

By Beebe, William, 1877-1962 Chanler, Robert Winthrop, 1872-1930 Grönvold, Henrik, 1858-1940

Publication info London, England :Published under the auspices of the New York Zoological Society by Witherby & Co.,1918-1922.
BHL Collections:
Smithsonian Libraries

justjames: We don’t talk about the moon enough like it is so beautiful and it’s just a big slab of...

Mon, 04 Sep 2017 16:00:26 +1000

justjames:

We don’t talk about the moon enough like it is so beautiful and it’s just a big slab of rock that can make tides like ??? amazing

bl3wyn: Benthic flatfish and benthopelagic cod on a shore – Jan...

Mon, 04 Sep 2017 08:00:33 +1000

bl3wyn:

Benthic flatfish and benthopelagic cod on a shore – Jan van Kesselsenior, 1626–1679

bijoux-et-mineraux: Rhodochrosite - N'Chwaning Mines, Kuruman,...

Sun, 03 Sep 2017 16:00:26 +1000

bijoux-et-mineraux:

Rhodochrosite - N'Chwaning Mines, Kuruman, Northern Cape Province, South Africa

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Sun, 03 Sep 2017 08:00:20 +1000

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Sat, 02 Sep 2017 16:00:32 +1000

thequarkside: There really are some veryyyyyyy strange worlds...

Sat, 02 Sep 2017 08:00:37 +1000

thequarkside:

There really are some veryyyyyyy strange worlds out there.

Elemental Profile: Gallium

Fri, 01 Sep 2017 16:00:30 +1000

materialsscienceandengineering:

Gallium is the thirty first element on the periodic table, giving it thirty one protons and electrons. It cannot be found as a free element and is one of the few metals that is a liquid near room temperature (gallium has a melting temperature of 29.8 °C or 85.6 °F).

On the periodic table, it is often classified as a post transition metal. These metals are generally soft, with poor mechanical strength and low melting points. Metals typically have good thermal and electrical conductivity and usually form cations rather than anions.

Gallium is a soft, silvery and brittle metal that is easily alloyed with many metals. It is a highly anisotropic element with two stable isotopes.

Source.

materialsscienceandengineering: Alloys: Colored Gold Many...

Fri, 01 Sep 2017 08:00:31 +1000

materialsscienceandengineering:

Alloys: Colored Gold

Many alloys of gold are often named by they way they change gold’s coloring, such as rose gold or white gold. This additions can be made to alter the properties - as gold is a rather soft and malleable metal - and often is done so for aesthetic reasons. Most forms of colored gold are used in jewelry or decorative items, with a few exceptions.

As gold is one of the few metals that exhibits color (along with copper), additions of other elements to gold can alter the structure ever so slightly in a way that alters the light reflected.

Colored gold alloys tend to fall into three main categories: those within the Au-Ag-Cu system (such as in the phase diagram depicted above); intermetallic compounds, and surface oxide layers. Perhaps the most common and well known varieties of colored gold include white gold and rose gold, but there are many others, including red, pink, green, blue, purple, and black:

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