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If one drive wheel turns more rapidly than the other, the machine moves along a curved path. If both wheels turn at the same speed, the machine follows a straight path. If one wheel stops and the other turns, or if the wheels turn in opposite directions, the mower pivots. [7] [9] [10] This drive system can be used on two types of zero-turn mowers:
Disney's Lady and the Tramp is the first feature-length animated film to be released in a widescreen format, after it is released in CinemaScope. [66] This was after Disney released the Academy Award-winning short film, Toot, Whistle, Plunk and Boom, in the same format two years prior. A Generation is the first film to use a squib. [67]
Ring-and-spring microphones, such as this Western Electric microphone, were common during the electrical age of sound recording c. 1925–45.. The second wave of sound recording history was ushered in by the introduction of Western Electric's integrated system of electrical microphones, electronic signal amplifiers and electromechanical recorders, which was adopted by major US record labels in ...
A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load.
It is possible that all these early Chinese examples were actually the same as, or very similar to, the "trotting horse lamp" [走馬燈] known in China since before 1000 AD. This is a lantern which on the inside has cut-out silhouettes or painted figures attached to a shaft with a paper vane impeller on top, rotated by heated air rising from a ...
The master cylinder had to have the wider feed as the grooves shrink in length through each process. The master mold is used to create "mothers" and these are then further processed to make working molds. Ad for Edison Records and Gem Phonograph, 1900. The Gold molded record used an aluminum-based wax, like the post-1896 Edison brown wax.
In the latest episode of "The Envelope" video podcast, director Coralie Fargeat explains how she prepared star Demi Moore to film "The Substance" and "The Brutalist" filmmaker Brady Corbet ...
Early models were essentially standard pocket watches fitted to a leather strap, but, by the early 20th century, manufacturers began producing purpose-built wristwatches. In 1904, Alberto Santos-Dumont , an early aviator , asked his friend the French watchmaker Louis Cartier to design a watch that could be useful during his flights.