Engineering - May 2007

I have to compare regenerative and electromagnetic braking systems, but i really can't think of anything. The only thing i have so far is that they both use induction.

I was also thinking that the electromagnetic braking would be more efficient, because there are no parts which can wear out and need replacing, and if permanent magnets are used they need no power input, whereas the regenerative braking systems, regardless of how well it charges when braking still looses energy, and has parts which can wear out, like brushes, but i'm not sure if this is true, it's just an idea i had.

So is that idea right, and does anyone have any other suggestions?

2007-05-26 19:45:49 · 4 answers · asked by Anonymous

why not just apply kirchoff's law and add up the potentials across each passive circuit element. why do we need to calculate impedance to find out total potential across the circuit

2007-05-26 18:56:38 · 4 answers · asked by Anonymous

2007-05-26 18:54:09 · 2 answers · asked by Anonymous

Please give a detailed answer

2007-05-26 18:14:29 · 5 answers · asked by Anonymous

I want to try it but i want to know if its possible first.

2007-05-26 18:08:22 · 5 answers · asked by ballineagles 1

Does the time period of a simple pendulum increase, decrease or remain the same if it is hanged from the ceiling of an accelerated car, or an elevator..?

2007-05-26 18:00:02 · 2 answers · asked by woodpeckerstruck_ouch 1

We are considering an RC series circuit and the voltage source is a DC voltage source

2007-05-26 17:52:59 · 4 answers · asked by Anonymous

Ok so I want to make a model of Graceland for my project.
Just the main part of it(the biggest building) and just the outside.
http://sketchup.google.com/3dwarehouse/details?mid=1c81c706cff126ccaa70c4903c15f294

2007-05-26 17:36:04 · 3 answers · asked by I am not ok 2

is it 40% Or what

2007-05-26 17:08:41 · 5 answers · asked by j j 1

I am embarking on a project to add water cooling to my PC. I want to make sure that I don't blow my fittings and flood my system by using too high of a water pressure. If I know the diameter of the tubing, and can messure the flow rate, can I calculate PSI?

2007-05-26 16:08:17 · 5 answers · asked by pinkfloyd_guy 1

Tina's can crusher has a mechanical advantage of 1. The force arm and the load arm is 1m. Would u buy her can crusher, why or why not??

2007-05-26 15:18:51 · 4 answers · asked by shiny 1

Somthing that launches stuff would be great.

2007-05-26 14:50:40 · 8 answers · asked by theTurkishTitan 3

Tina's can crusher has a mechanical advantage of 1. How long is the force arm if the load arm is 1m?

2007-05-26 14:35:14 · 3 answers · asked by shiny 1

NO DRAMA

2007-05-26 13:52:06 · 5 answers · asked by SALAM 1

i need a circuit design to convert 4 bit binary into decimal and display it in a two7-seg led display

2007-05-26 12:27:03 · 6 answers · asked by Anonymous

I'm trying to find out what the device is called where an electric spark rises between two antenna-like objects.

2007-05-26 11:20:35 · 4 answers · asked by AgentOrange 1

Hi there, I am a student, but I always have a problem for studying. Just like, people have read 10 pages , but I'm still on the 5th page. My mates have understood the equation, but I'm totally off the board.

Now I'm studying in mechanical engineering and I'm in a puzzle as to how to cope with this problem. My friends said, I can read quickly and only try to catch the point, but for me I also need to spend time finding out the point.

could anyone do me a favor to tell me how to read or study quickly and also improve study efficiency? many thanks!

2007-05-26 10:43:48 · 5 answers · asked by burningcalories 2

How can a teeter-totter be adjusted so a large child and a small child can play on it together?

Please include yr calculations THX!

2007-05-26 10:22:12 · 4 answers · asked by shiny 1

2007-05-26 10:02:46 · 7 answers · asked by dashingskamal 1

It is known that compressor oil will slowly coat the inside surfaces of air conditioner evaporator and and consenser coils thus reducing the thermal conductivity and consequently reducing the cooling efficiency. Over time, what is the typical percentage reduction?

2007-05-26 09:25:25 · 4 answers · asked by Bill B 1

grounding wires ever attached to the "neutral wire"? I have been reading some how to books that are confusing. They depict grounding wires attached to the "neutral wire". If this is the case, then why are they even called grounding wires as they are completing the circuit to the home, not going to the ground which is at zero potential.

My next question would be the following: The wire that carries electricity away from the house does take it back to the powlines that run along poles, correct? It would have to if all the houses are to be connected in paralell right? That is, electricity is not pumped from the hot wires through the neutral wire into the ground, is it?

any resources would be very helpful, even though some of them seem to confuse me more.

I realize this is a complex question. Thanks a lot for your help.

2007-05-26 09:08:06 · 3 answers · asked by kmm4864990 1

per day or week

2007-05-26 08:48:53 · 6 answers · asked by Anonymous

2007-05-26 07:01:42 · 3 answers · asked by swam 1

I thought maybe, radio shack, but no matter what I type in a search engine, I cannot seem to get it.

2007-05-26 06:20:40 · 5 answers · asked by Anne2 7

2007-05-26 06:11:46 · 6 answers · asked by 3antar 1

in machine repair and maintenance, i'm a very motivated self starter type person with no issues, but will they say i'm to old?

2007-05-26 04:49:25 · 3 answers · asked by JALISCO 2

I only want the standard per OSHA.

2007-05-26 02:32:07 · 2 answers · asked by Luis G 1

online

2007-05-26 01:13:39 · 1 answers · asked by Brian R 1

hey!

I wanted to know how much it costs to keep a pc on for 12 hours. - the reason being i have started keeping it on over night.

And also how much when i light is switched on for 2 hours

Just averages. thanksl.

2007-05-25 23:55:14 · 4 answers · asked by the_simple_life 1

2007-05-25 22:50:00 · 5 answers · asked by tarponfan 1