Why do railroads use timber ties on bridges and concrete ones on the ground?
Let’s learn why do railroads use timber ties on bridges and concrete ones on the ground. The most accurate or helpful solution is served by Yahoo! Answers.
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just had to walk the tracks in the Wendover Canyon in eastern Wyoming and noticed the difference in the ties. I'm curious. I know timber absorbs shocks and vibration better than ...show more
Answer:
Amtrak uses concrete on the Northeast Corridor. They converted open deck bridges to ballasted deck bridges...
C6D6EZAZUXRWPYH7IOCBJM6UMM at Yahoo! Answers Mark as irrelevant Undo
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have a new job at a company that installs POS systems(all windows based PC, really there is a sever and several nodes, just a network) in restaurants. Restaurants need to run cheaply to be profitable. The owners often cut corners. The manufacturer suggests...
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I don't see how you need isolated lines. I've some experience in grounds for large instrumentation systems...
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I'm 29 and have a couple of congenitally missing teeth (upper incisors - 7 and 10). I'm on year 2 of Invisalign per my ortho. The teeth behind where the upper incisors should be grew partially into that spot and there was a gap. I also had a gap in between...
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http://travelandsmile.files.wordpress.co… There is a pic of a bridge and what the dentist does...
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are ground power units (GPUs) for the B747 still in use? If they are, are there portable ones and stationary ones? i would appreciate a few links here and there cuz i am doing a school project.. =)
Answer:
GPUs are still being used be it on Boeing Aircrafts and other A/crafts They are portable, but bulky...
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OTTB's often have this issue; they are made claustrophobic from their starting gate training, and it...
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