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Crumple zones, crush zones, [1] or crash zones are a structural safety feature used in vehicles, mainly in automobiles, to increase the time over which a change in velocity (and consequently momentum) occurs from the impact during a collision by a controlled deformation; in recent years, it is also incorporated into trains and railcars.
The crumple zone concept was originally invented and patented by Barényi in 1937, before he worked for Mercedes-Benz; and subsequently in a more developed form in 1952. [19] The 1953 Mercedes-Benz "Ponton" was a partial implementation of his ideas, [20] by having a strong deep platform to form a partial safety cell, patented in 1941. [19]
This region in Pennsylvania, made famous by NASA's LANDSAT images, is the second-largest in the state and home to the famous anthracite fields. The rocks here are severely folded and contain numerous anticlines and synclines that plunge and fold back over each other. There are numerous thrust faults that help create a chaotic mess.
The Birth of Pennsylvania, a portrait of William Penn (standing with document in hand), who founded the Province of Pennsylvania in 1681 as a refuge for Quakers after receiving a royal deed to it from King Charles II. The history of Pennsylvania stems back thousands of years when the first indigenous peoples occupied the area of what is now ...
The mountains are made up of sedimentary rocks (mostly sandstone and shales, with a little conglomerate) that were part of a lowland that collected sediments eroded from mountains to the southeast in Mississippian and Pennsylvanian geologic time. The area has been uplifted and lowered several times.
The Erie Triangle is a roughly 300-square-mile (780-square-kilometre) tract of land that was the subject of several competing colonial-era claims.It was eventually acquired by the U.S. federal government and sold to Pennsylvania so that the state would have access to a freshwater port on Lake Erie.
Since the pilot program launched in April 2023, three vehicles have been registered driving over 100 mph through work zones on the Thruway and 27 vehicles have been recorded traveling more than 90 ...
2004: First podcast, invented by Adam Curry and Dave Winer, is a program made available in digital format for download over the Internet and it usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. [543] [544] [545] 2005: YouTube, the first popular video-streaming site, was founded