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1. Although it is widely recommended not to seek for shelter during a storm below a tree, wouldn't it be advisable to stay more or less near a tree (or something high)? That seems wiser than an open field. The lightning follows the shortest path, and that won't be me, but the tree. Additionally, does hiding in a woods somehow protect you against lightning for the same reason? 2. Couldn't really thick soles serve as protection, in the same way that a car's tires protects us? 3. What is the highest point that still gets hit by lightning? Is it possible for lightning to strike above the clouds? — Preceding unsigned comment added by 34and34 ( talk • contribs) 00:35, 21 July 2013 (UTC)
And how did Supersaurus protect itself during thunderstorms? Count Iblis ( talk) 15:52, 21 July 2013 (UTC)
In the section immediately above, the passenger compartment in an automobile is described as a Faraday cage (note: I don't think that article mentions insulators). Whereas a classic Faraday cage is composed of a continuous sheath of conductor (with gaps smaller than the wavelength of the electromagnetic radiation in question), an automobile has a substantial proportion surface composed of glass (windows), which I would consider insulator. So: what proportion (in terms of surface area) of a Faraday cage can be insulator? Does a light bulb (mostly insulator) serve as a Faraday cage? Apologies if this is obvious, but I don't completely trust intuition when it comes to physics. -- Scray ( talk) 01:21, 21 July 2013 (UTC)
We all "know" that deciduous trees are light green ("spring green") in the spring and that the green darkens through the summer. I can't find any documentation or explanation of the effect.
My hypothesis is that we're seeing a rough reversal reverse of the fall foliage effect. The yellow colors must come in first together with some chlorophyll and then more chlorophyll is produced resulting in a darker green as the season progresses. Apparently the chlorophyll is withdrawn first in the fall so we see pure yellow / orange / red leaves but it returns together with the yellow pigments in the spring so that we don't simply see fall foliage in reverse in the spring. — Preceding unsigned comment added by Doppler13 ( talk • contribs) 03:15, 21 July 2013 (UTC)
Can T-90 withstand hits from rpg-7 and spg-9 on the sides , can T-90 resist these weapons without reactive armor ? — Preceding unsigned comment added by Tank Designer ( talk • contribs) 10:44, 21 July 2013 (UTC) I am sorry because maybe these questions are not suitable here but I do not like forums . — Preceding unsigned comment added by Tank Designer ( talk • contribs) 10:46, 21 July 2013 (UTC)
Well thank you but I think that the ammo of T-90 is exposed because you know that the side amour of T-90 is very thin , what about the rubber side skirts are they effective against these weapons Tank Designer ( talk) 09:50, 22 July 2013 (UTC) ? — Preceding unsigned comment added by Tank Designer ( talk • contribs) 09:49, 22 July 2013 (UTC)
There is no doubt that those big antitank weapons and tank guns can penetrate the sides of T-90 -of course any other main battle tank- but the problem is the wrong way of storing the ammo of the tank which allows for a catastrophic accident when any simple penetration occurs through the sides of the tank . Tank Designer ( talk) 02:11, 23 July 2013 (UTC)-- Tank Designer ( talk) 02:11, 23 July 2013 (UTC)
Mrs Beeton frequently uses the term "osmazome" in Household Management, in which she defines it as "that part of the meat which gives flavour and perfume to the stock." Currently, Osmazome redirects to Umami (which isn't inconsistent with Beeton's definition), but the term is not mentioned in that article, and the earliest use of "Umami" is from 1906. If there are any references to support this redirect, or for a more appropriate one ( Glutamic acid (flavor), perhaps?), I think they should be included. Does anyone have any? Tevildo ( talk) 18:43, 21 July 2013 (UTC)
I am looking for references on operating characteristics of induction motors when operated on modified sinewave in the region of 50 to 60 Hz for the article Power_inverter. Modified sinewave in this context is a square wave with a period of off cycle at zero crossing. I would like to know the variation in characteristics as a function of the duty cycle of this off period as well. The characteristics I am seeking are starting torque, slip rate, running efficiency at varying loads and starting current.
These references look interesting from preview, but I do not have access to the full thing.
books.google.com/books?id=U-BsAAAAIAAJ
books.google.com/books?id=LLo3FbUdYBsC
Cantaloupe2 ( talk) 22:18, 21 July 2013 (UTC)
Science desk | ||
---|---|---|
< July 20 | << Jun | July | Aug >> | July 22 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
1. Although it is widely recommended not to seek for shelter during a storm below a tree, wouldn't it be advisable to stay more or less near a tree (or something high)? That seems wiser than an open field. The lightning follows the shortest path, and that won't be me, but the tree. Additionally, does hiding in a woods somehow protect you against lightning for the same reason? 2. Couldn't really thick soles serve as protection, in the same way that a car's tires protects us? 3. What is the highest point that still gets hit by lightning? Is it possible for lightning to strike above the clouds? — Preceding unsigned comment added by 34and34 ( talk • contribs) 00:35, 21 July 2013 (UTC)
And how did Supersaurus protect itself during thunderstorms? Count Iblis ( talk) 15:52, 21 July 2013 (UTC)
In the section immediately above, the passenger compartment in an automobile is described as a Faraday cage (note: I don't think that article mentions insulators). Whereas a classic Faraday cage is composed of a continuous sheath of conductor (with gaps smaller than the wavelength of the electromagnetic radiation in question), an automobile has a substantial proportion surface composed of glass (windows), which I would consider insulator. So: what proportion (in terms of surface area) of a Faraday cage can be insulator? Does a light bulb (mostly insulator) serve as a Faraday cage? Apologies if this is obvious, but I don't completely trust intuition when it comes to physics. -- Scray ( talk) 01:21, 21 July 2013 (UTC)
We all "know" that deciduous trees are light green ("spring green") in the spring and that the green darkens through the summer. I can't find any documentation or explanation of the effect.
My hypothesis is that we're seeing a rough reversal reverse of the fall foliage effect. The yellow colors must come in first together with some chlorophyll and then more chlorophyll is produced resulting in a darker green as the season progresses. Apparently the chlorophyll is withdrawn first in the fall so we see pure yellow / orange / red leaves but it returns together with the yellow pigments in the spring so that we don't simply see fall foliage in reverse in the spring. — Preceding unsigned comment added by Doppler13 ( talk • contribs) 03:15, 21 July 2013 (UTC)
Can T-90 withstand hits from rpg-7 and spg-9 on the sides , can T-90 resist these weapons without reactive armor ? — Preceding unsigned comment added by Tank Designer ( talk • contribs) 10:44, 21 July 2013 (UTC) I am sorry because maybe these questions are not suitable here but I do not like forums . — Preceding unsigned comment added by Tank Designer ( talk • contribs) 10:46, 21 July 2013 (UTC)
Well thank you but I think that the ammo of T-90 is exposed because you know that the side amour of T-90 is very thin , what about the rubber side skirts are they effective against these weapons Tank Designer ( talk) 09:50, 22 July 2013 (UTC) ? — Preceding unsigned comment added by Tank Designer ( talk • contribs) 09:49, 22 July 2013 (UTC)
There is no doubt that those big antitank weapons and tank guns can penetrate the sides of T-90 -of course any other main battle tank- but the problem is the wrong way of storing the ammo of the tank which allows for a catastrophic accident when any simple penetration occurs through the sides of the tank . Tank Designer ( talk) 02:11, 23 July 2013 (UTC)-- Tank Designer ( talk) 02:11, 23 July 2013 (UTC)
Mrs Beeton frequently uses the term "osmazome" in Household Management, in which she defines it as "that part of the meat which gives flavour and perfume to the stock." Currently, Osmazome redirects to Umami (which isn't inconsistent with Beeton's definition), but the term is not mentioned in that article, and the earliest use of "Umami" is from 1906. If there are any references to support this redirect, or for a more appropriate one ( Glutamic acid (flavor), perhaps?), I think they should be included. Does anyone have any? Tevildo ( talk) 18:43, 21 July 2013 (UTC)
I am looking for references on operating characteristics of induction motors when operated on modified sinewave in the region of 50 to 60 Hz for the article Power_inverter. Modified sinewave in this context is a square wave with a period of off cycle at zero crossing. I would like to know the variation in characteristics as a function of the duty cycle of this off period as well. The characteristics I am seeking are starting torque, slip rate, running efficiency at varying loads and starting current.
These references look interesting from preview, but I do not have access to the full thing.
books.google.com/books?id=U-BsAAAAIAAJ
books.google.com/books?id=LLo3FbUdYBsC
Cantaloupe2 ( talk) 22:18, 21 July 2013 (UTC)