Engineering - September 2007

In the Film Conspiracy, Mel Gibbson's character Jerry Fletcher outfittied his appartment to self-destruct? WHen his apartment is raided he set it ablaze. But the rest of the building was left unharmed do to fire-containment systems he set up. Is it possible to rig an apartment or office in such a manner?

Can an apartment or office be designed to self-destruct like this (destroy the office/apartment without damage to rest of the rest of the building)?

2007-09-13 16:45:44 · 7 answers · asked by Yahoo Sucks 5

what is a high freq diode, its uses.

2007-09-13 15:17:12 · 2 answers · asked by shadow 1

I have worked with many electricians and electrical contractors over my 24 years in the electrical field and have asked this question on the job many times and I was surprised that no one got it right except one, and he is an electronics engineer.

2007-09-13 14:23:31 · 10 answers · asked by ? 1

My daughter has aclass assignment. She needs to make a brick out of non-manmade products. Any suggestions?

2007-09-13 13:16:39 · 5 answers · asked by Betheny H 2

A. A system of prefixes C. The exact quantity people agree to use for comparison

B. the distance between two points D. the interval between two events

2007-09-13 12:37:02 · 3 answers · asked by Luvvly W 1

A point is moving with constant speed alonga circle of radius 3 shown in the figure. When T=0 the point is at A and moves counterclockwise. Find the equation of position of the projection of this point over the horizontal diameter AC x(t) and sketch the graph corresponding to the interval of time from the start until it goes around the circumference two times. Consider that the point takes 2pi seconds to get from A to C.




C·················································l····································o A

2007-09-13 11:50:32 · 1 answers · asked by marce 1

2007-09-13 11:08:07 · 3 answers · asked by lord_andys_new_id 1

I have a builder that is building a house that has spray foam in the walls and on the roof. I talked to the insulator and he said a rule of thumb is to use 1000 sq ft per ton, I can't use just a rule of thumb in need something solid. Does anybody know where to get info on how to run a load with this stuff? The newest edition of Manual J I have doesn't have anything in there about it. He can't give me any R-values on any of this because he says the values will be to low and it will look like I need to take out more BTUH. How am I supposed to do a job when I can't find any info about it.

2007-09-13 11:01:57 · 1 answers · asked by markandjess2003 3

High voltage switchgear usually applies interrupting arc quenching chambers to extinguish the arc between two contacts. a) Which principles are applied to extinguish the arc? b) Explain the extinction of the arc by an arc quenching chamber. Make some drawings to support your explanation. c) Which materials are normally used for the contacts? Which gas is used? Why?

2007-09-13 09:52:54 · 3 answers · asked by meesogynist 1

2007-09-13 09:48:01 · 3 answers · asked by sid 2

for school i need to build a mechanism that would launch a pumpkin

i really dont care how far it gets

i dont even care if its just a slingshot or an air cannon

any tutorials with detailed descriptions on how to make it.
and it needs to be very cheap.

2007-09-13 08:58:45 · 4 answers · asked by nick c 2

2007-09-13 08:41:12 · 4 answers · asked by ajmide2002 1

2007-09-13 07:55:15 · 4 answers · asked by ajmide2002 1

2007-09-13 07:13:22 · 2 answers · asked by ? 1

2007-09-13 06:56:38 · 3 answers · asked by onfireboy1234 1

I would prefer to use batteries as a power source.

2007-09-13 06:49:39 · 8 answers · asked by kid_A 2

I am trying to imagine the thickness of a metal sheet that I am told is 0.15. When I asked if this was mm. they said no, that it was in thousands. I am buying a product on the internet and would like to compare this measurement to something that will give me an idea of how thick the metal will be (for example, a sheet of paper, a sheet of cardboard, etc.)...

2007-09-13 06:29:16 · 3 answers · asked by nikita 2

2007-09-13 05:50:31 · 8 answers · asked by Bill W 【ツ】 6

I'm modifying my xbox 360 by adding additional fans into the 360. The current stock fans (2 fans) run at 9v. but is rated for 12VDC. I'm going to add two more 12v. fans. I have found different 12v. sources on the motherboard.

My ideas are:
A. solder all 4 fans to the 12v. source for the DVD drive
B. solder all 4 fans to the power supply plug on the motherboard.
C. power by installing a open circuit jack for 2-conductor plugs and using a 12VDC/800mA adapter

The Xbox 360 power supply provides 203 watts, and 12v DC current at 16.5 amps, and 5v DC at 1 Amp.

Would the four fans combine take too much power away from the 360? Please let me know what might happen if I choose A or B. Thanks!

2007-09-13 05:39:26 · 4 answers · asked by Reinnie 2

HELPP

2007-09-13 05:19:09 · 3 answers · asked by ¤Inchie¤ 1

model: sanwa Yx-360TRD
made in japan

2007-09-13 04:11:22 · 7 answers · asked by 'Ya 1

what time of educational requirements do you need and do u need any special licenses????? help asap...

2007-09-13 03:38:09 · 5 answers · asked by Anonymous

2007-09-13 03:35:55 · 4 answers · asked by Anonymous

Here's how it would work: the space station would be situated near an artificial dam with special flow-through ports at its base. The shuttle would rest upon the rim of what looks like a huge wheel. When it's time to launch, the flow-through vents at the bottom of the dam are opened, and the water causes the wheel to spin. The wheel continuesto spin faster and faster until escape velocity is either almost reached, reached or exceeded, at which point the shuttle is flung from the wheel, utilizing perhaps a small amount of rocket fuel to assist in the ascent. The wheel would be balanced by weights, of course, the weight opposite the shuttle being detached at the same time as the shuttle itself.

Even remotely feasible?

2007-09-12 18:21:30 · 5 answers · asked by uncleclover 5

I am not entirely sure how it works. So, because of the difference of impedance b/t lets say a transmission line and a load creates a difference of voltage. To cross this voltage some of the energy of the signal is given up and the rest of the energy can't cross this distance and reflects back. I kinda don't get how the last part affects the signals. Is it just interference with the reflected waves when the incoming waves go through or does the energy loss across this potential effect the waveform.

Lets consider a 1,000 ohm source impedance, 50 ohm wire impedance, and 10,000,000 ohm oscilloscope impedance, which was used during class demonstration. The cable was connected where he put a resistor 50 ohm and a 50 ohm terminator to show reduction in the noise. Don't you apply the reflection coefficient to the source-cable junction and then scope-cable junction. I got for one (10M/50 -1 )/(10M/50-1) that would mean the cable is infinite and should not be much noise.

2007-09-12 17:20:21 · 2 answers · asked by Anonymous

Please explain in term of integrator & differentiator performed by opamp,actually what are they?

2007-09-12 16:38:54 · 4 answers · asked by A learner 1

I understand the five fans would add up to 650mA, would the ampere of the adapter damage the fans

2007-09-12 15:30:29 · 3 answers · asked by Reinnie 2

I am running a 180 watt electric motor (e-bike conversion kit) via a 36 V 10 amp hour lithium ion battery. Can anyone give me advice on setting up a solor powered system to most effectively charge the battery?

2007-09-12 15:08:17 · 4 answers · asked by anton t 1

For instance, if i put a wet book in the microwave, could I expect it to dry?

2007-09-12 15:06:11 · 7 answers · asked by Anonymous

Why is this more efficient than most other simple methods? Why is the pointer significant in the coding of one of them? Thanks

2007-09-12 13:50:54 · 1 answers · asked by Galbadian 2