" For example, the electron and the muon both have half-integer spin and unit electric charge, but the muon is about 200 times more massive. The electron and the electron-neutrino, and their counterparts in the other generations, are called "leptons", "weakly interacting particles" . Unlike the quarks, they do not possess a quality called "color", and their interactions are only weak and electromagnetic, and fall off with distance. On the other hand, the strong or "color" force between quarks gets stronger with distance, so that quarks are always found in colorless combinations called hadrons, a phenomenon known as quark confinement. These are either fermionic baryons composed of three quarks (the proton and neutron being the most familiar example) or bosonic mesons composed of a quark-antiquark pair (such as pions). The mass of such aggregates exceeds that of the components due to their binding energy. Tests and predictions The Standard Model predicted the existence of W and Z bosons, the gluon, the top quark and the charm quark before these particles had been observed. Computer Model Railroad Interface Their predicted properties were experimentally confirmed with good precision. The Large Electron-Positron collider at CERN tested various predictions about the decay of Z bosons, and found them confirmed. "

" Characteristics The Ford Model T car was designed by Henry Ford, Childe Harolde Wills and two Hungarian emigrants named József Galamb and Jenő Farkas. The revolutionary Model T factory assembly line system was devised mostly by Charles E. Sorensen and Charles Lewis. 1 The Model T had 177 in³ (2. 9 L) 4 cylinder motor in a block producing 20 horsepower (15 kW) for a top speed of 45 mph (72 km/h). The engine had side valves and 3 main bearings. Recent accounts credit the default-configuration Model T with fuel economy on the order of 25 to 30 miles per gallon. Bachman Model Railroad Production Ford's Piquette plant could not keep up with demand for the Model T and only 11 cars were built there during the first full month of production. In 1910, after assembling nearly 12,000 Model T's, Henry Ford moved the company to the new Highland Park complex. "