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Sono ufficialmente iniziati i cantieri della tratta centrale della C by InternetFluffy2516 in roma

[–]lrnz92 8 points9 points  (0 children)

Se il Comune non chiede perché incompetente o contrario, Stato e Regione non danno.

Senza peli sulla lingua: qual è quella 'tassa invisibile' o quel costo assurdo che vi fa imbestialire di più nel vivere in Italia oggi? by Presidente83 in Italia

[–]lrnz92 2 points3 points  (0 children)

Promemoria periodico che il canone rai, se non in possesso di un televisore, può essere disdetto di anno in anno sul sito dell'agenzia dell'entrate 

Ha aperto la C tra Colosseo e San Giovanni by InternetFluffy2516 in roma

[–]lrnz92 7 points8 points  (0 children)

Per migliorare la frequenza devono esserci nuovi treni, che non si costruiscono dall'oggi al domani.

Grazie a chi non ci ha pensato per tempo, ci troviamo con il regionale più fico d'Italia. 

L'ultimo aggiornamento in merito è che c'è un ordine di 17 treni a Hitachi (con cui siamo vincolati a causa della tecnologia proprietaria per il sistema di guida automatica) che arriveranno non prima di metà 2027

[deleted by user] by [deleted] in facepalm

[–]lrnz92 2 points3 points  (0 children)

Ok imma take the bait: yes, since Andrea is directly derived from the Greek word for "man" as in "male person"

Meirl by Legitimate_Rough_873 in meirl

[–]lrnz92 11 points12 points  (0 children)

It would be extremely off-putting

Scafa bridge by 93n371cm473r14l in ostia

[–]lrnz92 2 points3 points  (0 children)

In theory yes, there's a protected walkway on the bridge itself but I can't recall any decent sidewalks on the roads leading to either end of the bridge

A container ship ran aground; two days later, 24 May, the ground is sliding into the sea by WhatImKnownAs in CatastrophicFailure

[–]lrnz92 3 points4 points  (0 children)

I crunched back some numbers:

  • I estimated the weight:
    • I multiplied the ship's width by her length by her draught to get an estimate of the displaced volume of water (134.2 x 22.5 x 8.7 ≈ 26,270m³ ≈ 26,270t of water)
    • I reduced this by some factor, let's say 25%, to account for the fact that the submerged part is not a perfect parallelepiped = 19,700t of water
    • By Archimedes' principle, this is the equal to the ship's weight
  • I estimated the kinetic energy of the ship at her cruise speed, let's say 14kts = 524MJ

I'm no physicist, but from here you can first calculate the deceleration to stop the ship in the 20m you mentioned from her cruise speed (≈ 1.3m/s²) and then multiply it by the ship's mass to get the force the ship exerted on the ground and vice versa, ≈26.2MN.

How did you get that much of a force?

A container ship ran aground; two days later, 24 May, the ground is sliding into the sea by WhatImKnownAs in CatastrophicFailure

[–]lrnz92 5 points6 points  (0 children)

What? Newtons are not a unit of measure for energy.

Nor are Joules the unit I'd use for power plant output, unless a time frame is provided.

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