Engineering - July 2006

The japanese tried to make a x-ray beam in the 50's but did not succeed because it did not go far enough...it could only melt an enemy at a range of 5 feet....if we develop this weapon, wouldn't there be no defense for it.....imagine a concentrated beam of microwaves that will melt your enemies and anything that stands in its way for about a mile or so......I'm working on it

2006-07-18 19:16:13 · 3 answers · asked by Anonymous

How far up can a pump lift water, and why is the discharge side
smaller than the suction side of the pump.

2006-07-18 19:03:11 · 5 answers · asked by paul w 2

In my house, there is a dining room with two different light switches that control the same light. I always thought that a light switch works by opening and closing the circuit controlling the flow of electricity to the light.

However, if the light can be turned on and off by both switches then how does the circuit really work? For example, if I walk into the room with both switches set on off and the light is off and turn one of the switches on, turning the light on then walk over to the other switch turning it to on as well. Instead of giving the light more power, it turns the light off. This puzzles me because it shouldn't be opening the circuit that the other switch is physically closed on.

2006-07-18 18:23:32 · 10 answers · asked by Justin 4

Even Newton said that only god ll bring this entropy level to zero.What does it mean?

2006-07-18 17:03:27 · 7 answers · asked by shree30 1

Obviously a 3-phase (or other mult-phase) power system needs to be grounded, but I am curious as to how this is done? Where are the ground wire(s) attached and where do they end up? Does a ground wire go to the ground actually or somewhere else? It seems like if it went to the ground it could be dangerous... I don't know much about electrical power or high voltage, but I think it is interesting. So, if you can answer this please do! -Thanks!

2006-07-18 16:51:28 · 5 answers · asked by blondjason1221 3

For the clever engineers...its obviously to design transistor/amplifier circuits with complex math tools (Spice, matrix equations, etc)

Is there a drastically simpler way to do this?

What I had in mind is a more intuitive approach and just building it up piece by piece without resorting to complex full circuit analysis.

I often see these extremely complex circuits (eg like the inside of an Op Amp) and think, how could I break this up and figure it out in a few minutes without some horrendous difficulty?

What might a simple approach look like? Im not adverse to a little math...but something drastically simpler.

Thanks for any intuitive insights.

2006-07-18 15:26:56 · 5 answers · asked by Anonymous

If i said that the "manual valve is downstream of the control valve"
is manual valve before or after the control valve

2006-07-18 15:15:04 · 10 answers · asked by Darth Jhon 3

2006-07-18 14:40:02 · 6 answers · asked by Tim S 1

2006-07-18 14:38:12 · 7 answers · asked by Anonymous

2006-07-18 12:51:36 · 10 answers · asked by Jeffrey E 1

2006-07-18 12:38:07 · 6 answers · asked by GAR0510 2

They seem to be the tallest thing around, so what put them up?

2006-07-18 11:42:12 · 3 answers · asked by Jeff 2

2006-07-18 11:15:53 · 4 answers · asked by Walker1200 1

A 300# Flange
A CL300 Flange
A 300 lb Flange

Aside that they are different names.

2006-07-18 10:52:00 · 4 answers · asked by Anonymous

I' just graduated from high school, am strong in math and science, and am considering majoring in biological engineering. I would probably do the program with the pre-med requirements, but I was just wondering what the other options were, other than med school. I'd appreciate any insights.

2006-07-18 10:26:53 · 3 answers · asked by sweet&sour 1

2006-07-18 10:22:39 · 5 answers · asked by Jose S 1

I'm accepted into an undergraduate study into Civil & Environmental Engineering and also Electrical Engineering. I need to choose between the two. If I choose CEE, then I'll go into Transportation and Construction. I will go into electronics engineering for EE. I find EE more interesting, but I'm a bit concerned of the academic and job outlook aspects (studies in electrial systems, circuit theories, DSP, programming, etc...) as they seem more difficult and not as intuitive as CEE. And I haven't been able to find internships for undergraduates who finished their first year while I can find many more for CEE as job market for EE doesn't seem good in Seattle, WA, USA.

2006-07-18 10:15:25 · 6 answers · asked by Kevin N 2

2006-07-18 10:04:54 · 6 answers · asked by nani 3

To re-phrase a question I asked before:

In my back yard, there are some steel bars embedded in concrete, from the foundations of an old out-house. I want to remove the steel, and leave the concrete intact.

I know I can cut off the steel, but I'm interested to know if I could (even theoretically) remove the steel bars intact, while only damaging the a small fraction of the concrete that immediately surrounds the steel.

Intuitively, it would seem that I could shake the bars out. Is this possible? Can anyone recommend any further reading on the subject (online resources preferred).

We'll assume the bars are not connected to any deeper structure.

It seems like a simple problem, but I can't stop thinking about it!

2006-07-18 09:42:51 · 11 answers · asked by Song2 2

2006-07-18 09:02:08 · 1 answers · asked by Sergio G 1

It must be made on a wider roll then cut to the width - but its so soft how is it possible?

2006-07-18 08:56:59 · 5 answers · asked by Anonymous

2006-07-18 08:55:28 · 1 answers · asked by TJ R 1

Some said they had anti-gravity machines to lift the great stones into place. Where, then, did the machines go? (Are they hidden inside the pyramid as a final step just to tidy up the work sites?)

2006-07-18 08:30:00 · 7 answers · asked by Anonymous

Need to determine the north and south of an unmarked magnet

2006-07-18 08:27:34 · 5 answers · asked by Martin T 2

Specifically an HF system give long range communication facility than an VHF
Some one from Aviation/ avionics or RF engineering field please clarify

2006-07-18 07:37:24 · 2 answers · asked by vayupundir 1

I need some reference material to back up steel's cool down temperature ( making steel), and time, and some specifications for floors to be built in steel mill areas. Thanks .

2006-07-18 07:33:52 · 3 answers · asked by Antonio. V 1

a book or ebook showing the development of BOQ rates from first principles: showing materials, equipment, labour and other cost items (quanities and thencost)

2006-07-18 05:34:06 · 2 answers · asked by Obafemi 1

software or program that can compute the numbers and size of reinforcing bars in a column or beam.

2006-07-18 04:25:26 · 3 answers · asked by jb 1

i need the second law of thermodynamics and its corollaries

2006-07-18 04:25:07 · 2 answers · asked by ifeanyi udekwe 1

2006-07-18 04:24:23 · 2 answers · asked by vim 1