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1911: NIVEA Creme – the first stable water-in-oil emulsion – was introduced. The emulsifying agent Eucerit is made from lanolin, found in sheep's wool, and is the key to NIVEA Creme's unique properties. [6] 1918: The deaths of Oskar Troplowitz and his partner Otto Hanns Mankiewicz resulted in the formation of a formal company on 1 June 1922 ...
"Invisible water" can be created to make it look as if a tin foil boat was floating in the air. Confirmed Adam and Jamie filled a fishtank with sulfur hexafluoride, a gas six times denser than air, and placed a foil boat in it. The resulting buoyancy force was enough to keep the boat from sinking to the bottom. They then filled a small cup with ...
Can concentrated hydrofluoric acid in a bathtub completely dissolve a human body, create a hole through the tub, and dissolve the bathroom floor below it? Can a chunk of solid mercury fulminate thrown on the ground explode, kill or injure bystanders, and break nearby windows, all without injuring the thrower?
Each of these plumbing fixtures has one or more water outlets and a drain. In some cases, the drain has a device that can be manipulated to block the drain to fill the basin of the fixture. Each fixture also has a flood rim, or level at which water will begin to overflow. Most fixtures also have an overflow, which is a conduit for water to ...
Rigid copper is a popular choice for water lines. Rigid or "Hard" copper tubing is generally referred to as "pipe". Copper "piping" is referred to by nominal pipe size, or the inner diameter. It is joined using a solder/sweat, roll grooved, compression, or crimped/pressed connection. Rigid copper, rigid due to the work hardening of the drawing ...
A drain-waste-vent system (or DWV) is the combination of pipes and plumbing fittings that captures sewage and greywater within a structure and routes it toward a water treatment system. It includes venting to the exterior environment to prevent a vacuum from forming and impeding fixtures such as sinks, showers, and toilets from draining freely ...
Pipe fittings: 1) Copper (solder); 2) Iron or brass (threaded); 3) Brass (compression); 4) Brass (compression to solder); 5) Brass adapters. PVC fittings. A fitting or adapter is used in pipe systems to connect sections of pipe (designated by nominal size, with greater tolerances of variance) or tube (designated by actual size, with lower ...
Due to its toxicity, most cities moved away from lead water-supply piping by the 1920s in the United States, [36] although lead pipes were approved by national plumbing codes into the 1980s, [37] and lead was used in plumbing solder for drinking water until it was banned in 1986. [36] Drain and vent lines are made of plastic, steel, cast iron ...