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Track superelevation is usually limited to 6 inches (150 mm), and is often lower on routes with slow heavy freight trains in order to reduce wear on the inner rail. Allowed unbalanced superelevation in the U.S. is restricted to 3 inches (76 mm), though 6 inches (152 mm) is permissible by waiver.
The relationship between speed and tilt can be calculated mathematically. We start with the formula for a balancing centripetal force: θ is the angle by which the train is tilted due to the cant, r is the curve radius in meters, v is the speed in meters per second, and g is the standard gravity, approximately equal to 9.81 m/s²:
For instance, in most of metro Dayton and Cincinnati, as well as in downtown Columbus, the speed limit is 55 miles per hour (89 km/h), while in Cleveland, Toledo, and Akron the speed limit is 60 miles per hour (97 km/h); however, in central Cleveland along the Inner Belt, the speed limit is 50 miles per hour (80 km/h). On one case, however, the ...
We can always encourage our athletes to sleep more. Have kids aged 6-to-12 get 9-to-12 hours per night and 13-to-18 get 8-to-10, the American Academy of Sleep Medicine says.
as a ratio of one part rise to so many parts run. For example, a slope that has a rise of 5 feet for every 1000 feet of run would have a slope ratio of 1 in 200. (The word "in" is normally used rather than the mathematical ratio notation of "1:200".) This is generally the method used to describe railway grades in Australia and the UK.
The 10,000 steps per day rule isn’t based in science. Here’s what experts have to say about how much you should actually walk per day for maximum benefits.
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Slow Startup: If your computer takes an unusually long time to boot up and become usable after turning it on, it could be a sign of underlying issues such as too many startup programs or a ...