Search results
Results from the WOW.Com Content Network
Thomas Midgley Jr. (May 18, 1889 – November 2, 1944) was an American mechanical and chemical engineer.He played a major role in developing leaded gasoline (tetraethyl lead) and some of the first chlorofluorocarbons (CFCs), better known in the United States by the brand name Freon; both products were later banned from common use due to their harmful impact on human health and the environment.
The death of Franz Reichelt (d. 1912), who jumped off the Eiffel Tower expecting his contraption to act as a parachute. Ismail ibn Hammad al-Jawhari (died c. 1003–1010), a Kazakh Turkic scholar from Farab, attempted to fly using two wooden wings and a rope. He leapt from the roof of a mosque in Nishapur and fell to his death. [5]
2 pb(c 2 h 5) 4 + 27 o 2 → 16 co 2 + 20 h 2 o + 2 pbo Pb and PbO would quickly over-accumulate and foul an engine. For this reason, 1,2-dichloroethane and 1,2-dibromoethane were also added to gasoline as lead scavengers—these agents form volatile lead(II) chloride and lead(II) bromide , respectively, which flush the lead from the engine and ...
2,2,4-Trimethylpentane, also known as isooctane, is an octane isomer which defines the 100 point on the octane rating scale (the zero point is n-heptane). It is an important component of gasoline . Isooctane is produced on a massive scale in the petroleum industry, usually as a mixture with related hydrocarbons.
A 1934 Standard 10/12 Speedline. The Standard Ten was a model name given to several small cars produced by the British Standard Motor Company between 1906 and 1961. The name was a reference to the car's fiscal horsepower or tax horsepower, a function of the surface area of the pistons. This system quickly became obsolete as an estimate of the ...
High Standard Model 10A Although the standard capacity of the Model 10 is 4 shells, there was a magazine tube extension available which would increase the capacity to 6 shells. On the early model shotgun the 10A, the upper plastic section also housed the built-in flashlight and carrying handle.
A fictional form of incapacitating agent, sometimes known as "knockout gas", has been a staple of pulp detective and science fiction novels, movies and television shows. It is presented in various forms, but generally is supposed to be a gas or aerosol that affords a harmless method of rendering characters quickly and temporarily unconscious ...
This article describes the mathematics of the Standard Model of particle physics, a gauge quantum field theory containing the internal symmetries of the unitary product group SU(3) × SU(2) × U(1). The theory is commonly viewed as describing the fundamental set of particles – the leptons , quarks , gauge bosons and the Higgs boson .