Q:I'm only asking this on here out of interest, this is not homework. I want to know how to calculate exact distances between to poles connected at the top by a cable. The length or height of the objects are not important to me, but if you must use an example please do so. So I want to know what formulas to use, what variables in those formulas mean, and how the slope of the cable will affect the distance. For example, if two poles have a distance between them of 0, and the cable extends 100, it would not mean that the drop of the cable (called a catenary?) would be 50, (it's misleading because you would think that since the distance between the two poles is 0, the cable would drop 50 and rise 50. But this is not taking into account the slope it has to take at the bottom of the catenary. It must lose some drop (perhaps to 48 or 49) in order to bend and rise back up...I want this out of my head, it's bugging me that I can't figure it out.

So you want the length along the cable? I honestly don't know how to compute the arc length of a catenary, but I'm sure that the power company knows how to do it because they need to know how much cable it will take to string up a whole line of poles. Your example doesn't work only because you impose a physically impossible constraint (zero distance between the poles - the poles have no thickness) and then try to impose physical reality (the cable can't bend instantaneously) on the problem. In the physically unrealizable problem, yes the cable does drop 50 ft because it is infinitely bendable. You're dealing with hyperbolic sines and cosines. Good luck

Q:i just got a new motherboard but after reading throuhg the manual i coudnt get any instructions on which cable goes which way. pls i need some one to help me. all other connections are okay i suppose but afraid to just connect the power,and the reset button cable any how.

Well... if they're the big white plastic plugs, then you aim the clip for the notch and you're good to go. If they're the smaller plugs that look amazingly like jumpers... then your motherboard should have come with a diagram to show how to plug them in. If not, look on the motherboard and see if you see metal pins with text closeby that says things like PWR SW or RST or HDD LED or PWR LED, or something similar. Generally, the text will point in the direction that the plug needs to go. Also, you generally want to make sure that the open metal part of the plug faces towards the inside of the two rows of metal pins (should be a row of 4 and a row of 5). Hope that helps.

Q:I have noticed on some power cables there is a quot;bumpthat the cable is wrapped around what looks like a magnet. Why?

also referred to as a Torroid which in agreement with the other responses, is an interferrece restrictor

Q:The power button doesn't appear to be wired correctly. I press it and nothing ever happens. The only way to shut it down is to forcefully remove the power cable. My PC also does not shut down when I select shut down in the start menu. It just restarts.

The wiring for your front panel is probably haywire. You need to open up your pc. The little cords that come from the front panel to the inside of your pc will have writing down the sides that tell you what they are, and right next to where they plug into your mobo will be writing that matches the writing on the cords. Make sure your cords are plugged in correctly.

Q:as far as i know, the only cable that connects the hdd with my motherboard is the sata cable, is this the cable that will do both transfer data and also provide electricty? or do i need another cable to connect the hdd and to power supply? same for my sata dvd burner, thx!

That all depends upon the present cable and the slots to which it is connected to.

Q:The hdd i am looking at is OEM nearly everywhere so i'm wondering what i would need to use it.

Any OEM challenging rigidity i've got ordered has no longer incorporate cables (they got here with the motherboard). do no longer comprehend the place you're ordering from although - ought to be distinctive. i'm getting all of my stuff from Newegg. and that's the place i could propose you %. some up in case you like them. continuously stable fees.

Q:Hi All, i have a star sound 1200w 4way amp which i want to use just for my sub for the meanwhile as im waiting on a monoblock, please tell me if i can install the amp without the fuse that connects straight on the power cable?? and what is the main reasons for that fuse? thanks in advance

You could connect it without the fuse but if something shorts out your going to fry the wiring. That's fuse is there for a reason, I wouldn't recommend not using it.

Q:what can i do so i can use my DL burner on my new pc?

EIDE (Enhanced IDE) is no longer a standard on most computers which uses SATA. In turn, they also use different power connections. The channel cable is dependent on the mother board, but the power supply is dependent on the power box. If there is an IDE channel, but no power cable, you have only two options. 1. Buy a new SATA based drive. 2. But a new power supply. Buying a new power supply to replace the one you have is definitely a void of warranty. You are much better off with a new drive.

Q:At the end of every work day I shut it down in the normal way (through the Start Menu) and then every morning I return to it and it won't turn on no matter how many times I press the on button or if I hold it down.The only way I can get the computer to turn back on is to remove the power cable for 10 minutes and then put it back in and hold the on button for about 10 seconds. This is a bit of a pain but also quite worrying as the computer is new.I wonder if my computer is broken or if this is an intentional feature. If so how do I turn it off?It might help to know that even when I have shut it down there is an LED on the back that stays on. In fact it stays on for 5 minutes even if I take the power cable out!I have a Dell Vostro 260S PC. It runs Windows 7 64-bit and the processor is an Intel i3Please help techies.

in the journey that your useful this isn't application appropriate !! First replace video card with on old pci card you recognize works .(you should disable onboard video if contemporary, agp, and pci-e and set to pci in bios) If it runs with out freezing then its an over heating video card. ( very regularly the case) on your bios ; regularly , there's a temperature application that has a temp decrease for cpu and mom board. locate out what your cpu and mom board operating limits are from their producer, not DELL.( DELL gadgets them lowwer) that's going to close you down and not in any respect assist you to boot until eventually it cools down in case you go with to confirm if its the mummy or cpu a million) take off the aspect panel the position you face the bottom of the mummy board and positioned a house fan in the front of it. If it doesnt freeze then the mummy board is over heating ( If it does 2) take off different aspect panel and position fan dealing with the ram ,video card, and cpu. Does it close down( if it does) One decision may be to purchase a a lot more advantageous fan ,warmth sink and thermal grease, this may help, yet when your cpu has over heated to many cases not something can help you. the mummy board will stick with the way of the cpu; almost immediately, if not collectively not in any respect positioned a pc in a table enclosure of any form ! And sparkling the interior( mutually with all warmth sinks , followers , and potential provide) periodically !! preserving your pc by technique of a chilly air go back as against a wall with a warmth sign up can help you

Q:Explain why a bird sitting on a 400 kV power transmission cable is not electrocuted?

Simple . It is not grounded.A curcuit has to be complete for electricity to flow through it.