I pay my dental insurance company far too much money for them to only cover amalgam fillings on the back teeth. Don't they know that they are bad? Shouldn't they have to follow certain health guidlines?
Just subtract. The bump is 211 km/h, which is very fast!
The type of pipe, and the specifics of that type of pipe (schedule, diameter, wall thickness, etc.) depends on your application. Common applications are electrical cabling, water, waste water, storm sewer, sprinkler water, compressed air, various gases, chemicals, coolant, etc. - each with specific requirements. Another factor is the location (indoor/outdoor, above/beneath ground, hazardous environments), and safety (both how likely someone is to snag it on equipment or run into/over it, and how dangerous whatever it is carrying would be if it got out). You also have to know specific requirements for how the pipe needs to be welded, fused, sealed, threaded, etc., how to test the system once it is in place, how many hangers are necessary to keep slope (or just to keep it from falling). The distances traveled, number of turns, slopes, pressures that the pipe has to be able to handle, and pressure required at the end of the pipe are all factors. I'm sure there are some general rules of thumb for pipe - but as with most things related to engineering, those simplified rules of thumb will get the uninitiated into a lot of trouble.
