Engineering - August 2007

In telephony space switching is well understood, but time slot switching, is not all that clear. Any reference to web site is welcome.

2007-08-27 01:55:17 · 2 answers · asked by Venkat R 6

I would plug the 120 watt appliance to extension cord then plug extension to transformer then transformer plugged into the wall.

I am trying to use my home appliances from the USA in Europe

2007-08-27 00:50:21 · 2 answers · asked by Anonymous

how do you get/know it's
1. rms value
2. frequency
3. period
4. represent in polar form

2007-08-27 00:17:01 · 1 answers · asked by stainz 2

2007-08-27 00:06:21 · 7 answers · asked by yanyanx10 1

I want to find a free printable version of the Mollier diagram h-s (enthalpy-entopy) preferably in metric units. I want to note, draw lines etc on it so I want to it to be a good and clear version. Also I would prefer it to be on high resolution so I will be able to print it on A3 or A2. Does anyone know where I can find it? Thanks in advance.

2007-08-26 22:59:43 · 4 answers · asked by BFG9000 2

2007-08-26 22:03:18 · 1 answers · asked by Anonymous

Why is it that if i leave my food in the microwave too long it gets hard (no pun intended)...

2007-08-26 20:30:50 · 3 answers · asked by Anonymous

Why is the power factor important?
about the phase relationship of voltage and current

2007-08-26 20:29:40 · 2 answers · asked by Anonymous

If you have a 5KVA or 3KVA power generator, how much is your gas consumption per hour usage?

2007-08-26 19:50:49 · 2 answers · asked by brycetech2003 1

2007-08-26 19:33:03 · 3 answers · asked by Lr B 1

Thomas Edison and George Westinghouse were involved in the Development Of Electrical Supply. What did they do?

If someone could please, some good websites on this matter would be very helpful

2007-08-26 19:13:57 · 3 answers · asked by Anonymous

My multimeter only can stand 600v & my oscilloscope only can stand1000v. If a voltage above 1000v what tools or equipments can I use to measure???thanks!!

2007-08-26 19:07:47 · 3 answers · asked by A learner 1

2007-08-26 18:20:17 · 1 answers · asked by romeo d 1

Ok, I want to understand this, I have the answer but I need to know why we got that answer, if we have a closed loop system with a given transfer function:

G(s) = 10 / (s+11)

What is the steady state output of the system when an input of:

2 cos (2t - 45)

is presented to the system.

the answer I have is 1.79 cos (2t - 55.3)

Please Explain, Thanx in advance.

2007-08-26 17:13:15 · 2 answers · asked by 037 G 6

Our primary 3-phase voltage is 13.8 kv, secondary voltage on the transformer is 220 volt. Is it ok or correct to connect the (bushing) primary side of the transformer on one line of the 13.8 kv and connect the bolted primary side on the ground by using ground rod only? Assuming all the required parts are used such as lightning arrester, fuse, disconnect switch, etc.

2007-08-26 17:05:51 · 1 answers · asked by romeo d 1

2007-08-26 15:32:42 · 11 answers · asked by math q 2

I don't have instructions. Usually the Japanese calculator for the memory is M+ and the memory recall is MR. Which function for the Ti-30Xa are the same as M+ and MR.

2007-08-26 13:37:09 · 2 answers · asked by Gameboy 4

Can someone please check to see if my answers are correct please!!! Thanks so much!!! If the answer is incorrect please correct it. The questions are in this format:

12A=_____mA

here they are:

12 A (Amp)=12,000 mA(milliamp)

4295 mA= 4.295 A

16210 Microamp=16.210 mA

.9 mA=900 Microamp

1.5 A=1,500,000 Microamp

.005 A= 5.00 mA

2007-08-26 12:50:55 · 4 answers · asked by Anonymous

Here is a website:
http://synopsys.championship.g...

so you think alll these award winning projects are original? What about the award-winning projects in Intel ISEF? Aren't many topics from science magazines?

2007-08-26 12:03:06 · 2 answers · asked by Anonymous

Ideas are paper&pulp, powerplants, chemical. What else? and what country uses it in industry the most?

2007-08-26 10:58:02 · 5 answers · asked by DH 1

2007-08-26 10:10:15 · 10 answers · asked by I hate Hillary Clinton 6

I just posted a question and got feedback that it is not possible to convert meters cubed to meters. I am a chemical engineering major and am working a problem. I am told benzene weighs 0.879 g/cm^3 and the tank it is filling is 2 meters in diameter and 4 meters long. I am told to derive a formula for the weight of benzene as a function of h, the height of the tank. I was thinking convert to meters then multiply by 4. Since I have been told I cannot convert different dimensions, do you have any suggestions as to how to tackle this problem.

2007-08-26 09:40:16 · 5 answers · asked by behindthemask 2

2007-08-26 09:32:43 · 4 answers · asked by concreterabbit 3

2007-08-26 09:10:01 · 2 answers · asked by Bib 2

What is meant by band & channel, is there a constant frequency after each channel or its up to us, what does it mean by changing a channel.

2007-08-26 09:04:34 · 3 answers · asked by Kasprov 1

2007-08-26 08:17:46 · 5 answers · asked by Rube 2

i work in a factory, we have this manual conveyor belt we slide the boxes on. I had an argument with a co-worker, i say if i added a belt over the conveyor that i could jog on the belt, he says it would get too fast. What do you think?

2007-08-26 07:27:33 · 2 answers · asked by Carbon steel 2

2007-08-26 06:33:42 · 8 answers · asked by amponnu 1

If I am building a +48V power supply for condenser mics, how stable should the output voltage be? What should my range of error be, as in 48.0 +/- X volts, for solid, functional operation?

2007-08-26 05:46:12 · 2 answers · asked by Not Eddie Money 3

Is our country still building particularly large and monumental dams?

2007-08-26 04:59:46 · 3 answers · asked by Christine E 1