Recent comments in /f/explainlikeimfive

mazamayomama t1_j1s3fep wrote

same for mopeds and motorcycles etc. The engine and transmission are connected in gear(drive) when two are linked and it's a matter of whether enough horsepower is being generated to move based on current RPM, if not enough or on a hill or carrying load all require more engine torque to get moving initially

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MrWedge18 t1_j1s37mp wrote

Here's a great video about an LA underground power line. It goes over many of the downsides of underground power lines.

TL;DR

  1. The lines need to be insulated from each other. Above ground, they can just be hung far away from each other. Under ground, you need to spend more money either building a large tunnel or adding insulation.
  2. Locating where underground lines have been damaged is a pain in the ass (more expensive and longer down time).
  3. Digging up the lines to do the repairs is also a pain in the ass (again more expensive and longer down time).
  4. Just doing maintenance is a pain in the ass. So underground lines won't have trees falling on them, but they'll just fail because it's not worth doing preventative repairs and maintenance.
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mysilvermachine t1_j1rxv35 wrote

Green comes from the norther European traditions of decorating with evergreens for the midwinter festival, presumably because of the association with the rebirth of spring. Red probably because of colour contrast. But it’s noteworthy that when Christmas trees became popular in the U.K. and then the USA gold was the usual colour of ornaments.

So, like all things it evolves over time.

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blacksteel15 t1_j1rxit4 wrote

A lot of modern construction does use underground lines because they are far more reliable overall. But they're also a lot more expensive and a lot harder to service when they do break, especially if they run under pavement or other manufactured ground cover. While today underground lines are feasible, power lines predate widespread availability of powered construction equipment, so the amount of digging required would have been prohibitive. Now the biggest reason we still use overhead lines is simply institutional inertia - it's what's already there. Replacing the entire grid would be cheaper long-term but has an enormous upfront cost and doing it piecemeal would require transitions from overhead to underground that introduce a whole bunch of engineering and safety issues. There are a lot of people who think we should make the transition anyway for the exact reasons you brought up, and in many countries underground lines are now standard.

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Knowitallkyle t1_j1ru2fw wrote

Incorrect. The clitourious is what grows into a penis after a fetus has been androgenized. Cultures that remove the clit are removing the equivalent of cutting off a males penis. Several cultures practice this as said. You sir or madam don’t have a clue what you are talking about.

https://urology.ucsf.edu/sites/urology.ucsf.edu/files/uploaded-files/attachments/4_s_development_of_the_penis_and_clitoris_1-s2.0-s0301468118300938-main.pdf

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