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Terrarium. A terrarium ( pl.: terraria or terrariums) is usually a sealable glass container containing soil and plants that can be opened for maintenance to access the plants inside; however, terraria can also be open to the atmosphere. Terraria are often kept as ornamental items. A closed terrarium's transparent walls allow heat and light to ...
A molten-salt reactor ( MSR) is a class of nuclear fission reactor in which the primary nuclear reactor coolant and/or the fuel is a mixture of molten salt with a fissile material. Two research MSRs operated in the United States in the mid-20th century. The 1950s Aircraft Reactor Experiment (ARE) was primarily motivated by the technology's ...
Terraria ( / təˈrɛəriə / ⓘ [ 1]) is a 2011 action-adventure sandbox game developed by Re-Logic. The game was first released for Windows and has since been ported to other PC and console platforms. The game features exploration, crafting, building, painting, and combat with a variety of creatures in a procedurally generated 2D world ...
The point of sale ( POS) or point of purchase ( POP) is the time and place at which a retail transaction is completed. At the point of sale, the merchant calculates the amount owed by the customer, indicates that amount, may prepare an invoice for the customer (which may be a cash register printout), and indicates the options for the customer ...
e. This is a list of video games that have sold the highest number of software units worldwide. The best-selling video game to date is Minecraft, a sandbox game released by Mojang in November 2011 for a wide range of PC, mobile and console platforms, selling more than 300 million copies across all platforms. Grand Theft Auto V and EA's Tetris ...
Ionium-thorium dating is a technique for determining the age of marine sediments based upon the quantities present of nearly stable thorium-232 and more radioactive thorium-230. ( 230 Th was once known as ionium, before it was realised it was the same element as 232 Th.) Uranium (in nature, predominantly uranium-238) is soluble in water.
Thorium (IV) nitrate used in a lamp. Thorium (IV) nitrate is a chemical compound, a salt of thorium and nitric acid with the formula Th (NO 3) 4. A white solid in its anhydrous form, it can form tetra- and penta hydrates. As a salt of thorium it is weakly radioactive .
Thorium reacts with hydrogen to form the thorium hydrides ThH 2 and Th 4 H 15, the latter of which is superconducting below the transition temperature of 7.5–8 K; at standard temperature and pressure, it conducts electricity like a metal. [12] Thorium is the only metallic element that readily forms a hydride higher than MH 3. [31]