Solar powered Fresnel Lens melts through plaster and vaporizes aluminum instantaly.
[ Ссылка ]
Using a rock as film to capture a temporary image of the sun 0:36. Backyard Lava Homemade Obsidian Rock conversion and How the sun can vaporize aluminum with a Professional grade Fresnel Lens. Forming borosilicate glass tubing. At 0:36 the image of the sun is exposed into the rock surface.
The maximum working temperature of plaster is 1,200 °C (2,200 °F), so higher melting temperature materials would melt the plaster mold. Also, the sulfur in the gypsum reacts with iron, making it unsuitable for casting ferrous materials.
Minecraft
Obsidian is a deep purple and black block that was first released into the game in version 0.30. Obsidian may be found naturally on rare occasions, when there is flowing Water and source Lava blocks nearby. Obsidian is created when flowing water hits a lava "source block"; when water and runoff lava collide, Cobblestone is created. In the Overworld, Obsidian never actually spawns with the chunk, but is created by the environment. In The End, solid pillars of obsidian can be found on the surface. Obsidian can only be successfully mined with a diamond pickaxe.
Each obsidian block takes 9.4 seconds to mine when using a diamond pick. As of 1.0.0, it takes 4 minutes and 10 seconds to break obsidian using anything other than a diamond pick.
Obsidian found naturally is somewhat rare and difficult to mine since it usually rests on top of a Lava block. Obsidian farming is thus the preferred way to acquire large quantities. A basic Obsidian farm is composed of a trough seven blocks long into which seven blocks of Lava are poured using the Bucket. A water block is then placed on top of one end of the trough so that it flows onto the lava and converts it into Obsidian.
As of the Halloween Update, Obsidian can be used to create portals to The Nether. This requires 10 to 14 blocks of Obsidian and a Flint and Steel or Fire Charge. The portal must be four blocks wide and five blocks tall (with 10 blocks, it would be the same dimensions.
Minecraft
From Wikipedia, the free encyclopedia
Minecraft
Minecraft 1.2.5 main menu window
Developer(s) Mojang, 4J Studios (Xbox 360)
Publisher(s) Mojang
Designer(s) Markus "Notch" Persson
Jens Bergensten
Artist(s) Kristoffer Zetterstrand
(In-game artwork)
Markus "Junkboy" Toivonen
Composer(s) Daniel "C418" Rosenfeld
Version 1.2
Patch versions[show]
Platform(s) Java platform, Java applet, Android, iOS, Xbox 360
Release date(s) PC (Java)
WW November 18, 2011
Android
WW October 7, 2011
iOS
WW November 17, 2011
Xbox 360
May 9, 2012[1]
Genre(s) First-person, sandbox
Mode(s) Single-player, multiplayer
Media/distribution Download, in-browser
Minecraft is a sandbox-building[2][3] independent video game originally by Swedish creator Markus "Notch" Persson and now by his company, Mojang.
Minecraft is focused on creativity and building, allowing players to build constructions out of textured cubes in a 3D world. Gameplay in its commercial release has two principal modes: Survival, which requires players to acquire resources themselves and maintain their health and hunger; and Creative, where the player has an unlimited supply of resources, the ability to fly, and no concept of health or hunger. A third gameplay mode, named Hardcore, is essentially the same as Survival, but the difficulty is locked on the hardest setting and respawning is disabled, forcing the player to delete his or her world upon death. An outdated Classic version is also available for free, although it is no longer being developed. Creative Minecraft resembles Classic, but with many more features.
The gameplay is heavily inspired by Infiniminer by Zachtronics Industries,[4] and Dwarf Fortress by Bay 12 Games.[5][6]
Minecraft was released as an alpha on May 17, 2009,[7] with a beta version on December 20, 2010.[8] Official releases for iOS[9] and Android have been released and the full version of the PC game was released on November 18, 2011 at MineCon 2011. The Android release was temporarily exclusive to the Xperia PLAY but is now available to the rest of the Android Market.[10][11] A heavily stripped version of the game has been developed for the Xbox 360 by independent game developers 4J Studios, which was released on May 9th, 2012. Minecraft was developed for about a week before its public release on May 17, 2009, on the TIGSource forums, where it gained a considerable level of popularity. It has been continually updated and patched since then, and while it was still in alpha release, it garnered several hundred thousand sales and received critical notice and acclaim from many reviewers. It passed a million units sold on January 12, 2011,[12][13] less than a month after reaching Beta. By February 18, 2012, the game had sold more than 5 million units.[14]
