Engineering - December 2006

Not a new question I think but WHY?? I understand positive and negative, maybe even a ground wire, maybe more if you have several different voltages going into one wire... but why so many shapes? There's 4-pin round connectors, inline connectors, inline with a notch or a triangular side, square connectors, square with D-shaped side, square with a notch, plus round OR flat pins, or combinations of the two, or differently angled flat pins.... WHHYYY?

2006-12-28 16:11:50 · 3 answers · asked by Enrique C 3

2006-12-28 15:23:33 · 13 answers · asked by Anonymous

2006-12-28 15:15:36 · 3 answers · asked by sel98 1

Is there any sensors like stickers that can sense our finger movement and report the corresponding movement to my hand held device. If not can any one give me the technlolgy for wireless finger movement sensor. Is hall effect sensors works under these conditions.

2006-12-28 15:06:18 · 2 answers · asked by myvsarun 1

When I was younger I just had to take on apart to see what made it tick. Bad idea:) Had a nasty suprise when I pressed the button by accident. Stun like hell.

2006-12-28 14:25:30 · 5 answers · asked by Anonymous

what is the amplifier, and how can we use transistors to convert AC to DC.

2006-12-28 13:16:51 · 10 answers · asked by eng. 1

will it ever be possible to teleport people? when do you think this will happen?

2006-12-28 13:03:36 · 9 answers · asked by yo 2

advantages and disadvantages please

2006-12-28 12:51:59 · 12 answers · asked by eng. 1

2006-12-28 12:01:55 · 3 answers · asked by shepard8002 1

Whats the difference and which one is better if there is one?

2006-12-28 11:39:26 · 8 answers · asked by Anonymous

2006-12-28 11:11:43 · 2 answers · asked by sinotec2 1

What size wood beam is needed to replace load bearing wall?
I would like to remove a load bearing wall in the basement of my two story house. Cut 2x10 floor joists are now supported by this wall. On one side, the room area is 138sqft (2x10's are 10'10'' long), on the other, the room area is 96sqft (2x10's are 7'6" long). The unsupported span of the beam will be 10'8". What size LVL or Parallam do I need?. What is the best way to support the ceiling during wall removal and beam installation? Is there something I can rent to avoid building temporary walls?

Thanks!

2006-12-28 11:11:31 · 5 answers · asked by wonderman 1

2006-12-28 11:01:58 · 7 answers · asked by STORMY K 3

I thought maybe I could network into a company by taking a non engineering job if necessary and show them my work as the opportunity arises.

2006-12-28 10:19:32 · 3 answers · asked by engineerlaborer 3

2006-12-28 09:28:53 · 3 answers · asked by Arnon G 2

Degaussing coils are used to correct color issues on television sets (and other types of video monitors). Many computer monitors have a degauss button built-in, many televisions do not. The coil creates a powerful magnetic field. This field can erase floppy disks, cassettes, etc. What about RFID chips (such as the type forced upon US passport holders starting next year)?

2006-12-28 09:24:21 · 2 answers · asked by maslowpoet 1

2006-12-28 08:38:57 · 2 answers · asked by STORMY K 3

At intervals they have a series of right angles. is it to keep them from freezing? how does that work?

2006-12-28 08:24:55 · 3 answers · asked by domangelo 3

I heard that sometimes there is a separate power plant that is built right next to the steel mill for the gas/heat byproducts that would otherwise be wasted. Is this true in the case of US steel mills? I am looking for a list of US steel mills that do this.

2006-12-28 08:21:59 · 1 answers · asked by Anonymous

It was too far from the Twin Towers to suffer any structural damage, the fire inside Bldg 7 was small, Bldg 7 housed important offices like the NYC mayor's emergency command center, CIA and IRS offices, and the building collapsed STRAIGHT DOWN like it was a controlled demoltion.
If debris from the Twin Towers were responsible for the collapse of WTC 7, then wouldn't it have collapsed from the BASE of the building instead of from the top falling down like in a controlled demolition?

2006-12-28 08:09:29 · 5 answers · asked by Anonymous

Anything

2006-12-28 08:02:11 · 6 answers · asked by Paul S 1

Looking for "Temperature" F./C. not "solid,liquid,gas"... ps; What key is used to make a "degree" mark with a computer keyboard? ...this cost me 5 points for 1 question, lets see If I can get 2-4-1... thanks....{!!!FIRE IS HOT!!!}

2006-12-28 07:01:18 · 5 answers · asked by Anonymous

2006-12-28 05:27:39 · 5 answers · asked by jmseymour1 2

drill size and pitch dia

2006-12-28 05:23:00 · 4 answers · asked by uthaya k 1

google search is not helping. i want details about working, principle and construction of dry cell recharger. I have submit the project.

2006-12-28 04:48:35 · 2 answers · asked by d-lip 1

One of my ongoing projects is to save electricity costs at my plant. We have several continuous-duty electric motors used to run things like conveyor belts. My question is, would shutting those motors on and off (ie: on for 20 days, off for 20 days) appreciably shorten the motor's life? I need to know if the plant would save any money by using less electricity, versus the replacement cost of the motors. Thanks.

2006-12-28 04:08:27 · 4 answers · asked by MadScientist 4

...as in wiring differences etc and when/why it's used ?

2006-12-28 03:43:51 · 6 answers · asked by Anonymous

The normal practice to break cast iron large chunk is to drop big steel ball over it from a hieght. This process in unsafe and crude considering todays technology. Since cast iron is some what rigid, liquid nitrogen stream over it may create differential expansion/contraction leading to development of crack and there fore breaking into pieces.

2006-12-28 03:34:28 · 2 answers · asked by P.K 1

2006-12-28 03:25:00 · 4 answers · asked by ? 5

2006-12-28 03:12:17 · 1 answers · asked by Red Falcon 1