Questions tagged [engineering]
39 questions
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On what basis did Kennedy think that humans could land on the moon so quickly?
In September 1962 a nice young man ordered the United States to commit to landing on the moon in eight years. Even though none of the technologies, methods, or materials for doing so existed at the time.
On what basis did Kennedy think that this was…
dotancohen
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How did Newcomen's Atmospheric Engine lift water above the 10.3m vacuum limit?
I've been reading about Newcomen's engine but i'm not clear on how he overcame the lift limit due to gravity on the water column overcoming the suction of the partial vacuum. Did the engine somehow create a continual positive pressure and if so…
u0362565
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Is the article reporting the first cell phone still around?
At around the 3 min mark in this video https://www.youtube.com/watch?v=C6gNeKjC9Cc, Dr. Martin Cooper, the inventor of the first cell phone says that he made the first phone call on 4/3/73 to impress a journalist. Could anyone provide a link to the…
mikeLundquist
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When were self-locking doors invented and when did they become commonplace?
In the 1950s in The Netherlands, it was common for people to hang a little rope through the mailbox, so that children (which apparently did not have a copy of the key) could let themselves in at any time.
On the outside, it looked like…
gerrit
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Before metric length units were based on the speed of light, how were sub-units accurately derived from the reference bars?
Its my understanding that before metric units of length were based on the speed of light, there were reference bars that were used to calibrate other (mostly calibration) equipment.
How were these units accurately subdivided into centimeters,…
Sawyer Schumacher
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Math-education comparsion between Japan and United States from perspectives of engineering contributions
I may think that this post is unsuitable in HSM.
NASA launches rockets far more than JAXA(Japan Aerospace Exploration Agency).
BostonDynamics-robots are way general-purpose than Japan's FANUC-robots.
However when it comes to average math education…
electrical apprentice
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What did the pre-construction survey campaign of the Golden Gate Bridge involve?
The Golden Gate Bridge was built in the 1930's across the the Golden Gate strait. The conditions in this straight are pretty challenging from an environmental perspective with strong tides.
In modern construction, nearly every project is accompanied…
gktscrk
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