Engineering - July 2006

we talk of globalisation and generalisation in everything we also talk about engineering starndards used all around the world that is why they come to say metric,iso etc also standard systems like mks ,fps ,cgs,s.i. emerged. but even now in countries like u.s people use lbs (pounds) etc to measure and calculate and uk,india etc use s.i. why is this difference occuring?also even i heard that there are two metre scales called british and american in which american is 3cm smaller than the former? why is these all being followed ?why is there no globalisation in this?

2006-07-18 04:17:28 · 7 answers · asked by Anonymous

2006-07-18 04:15:30 · 10 answers · asked by Hummbaba 5

If I ran one device rated at 125 volts 100 watts from a 125 volt power supply, and another device rated at 225 volts 100 watts (same wattage) from a 225 voltage power supply and the both voltage power supplies has the same diameter wires (type of conductors), which device would waist more electricity, making the electric bill more expensive?

2006-07-18 04:10:35 · 6 answers · asked by Anonymous

We have so far read about semiconductors,transisters,rectifiers, JFET,MOSFET,CRO.If you can suggest me some projects which will be using the basic knowledge of these things then its good

2006-07-18 03:58:40 · 3 answers · asked by meghabalika 1

2006-07-18 02:55:45 · 5 answers · asked by !!!!!!!!!!!!!!!!! 1

Hi,
I have seen many automation equipments providing 5V interface, but all industrial devices, relays and sensors work on 24V. So I need to know how to convert 24V to 5V and vise versa with complete protection & isolation

2006-07-18 02:38:02 · 3 answers · asked by Anonymous

are we not trying hard or it has no purpess

2006-07-18 02:04:32 · 6 answers · asked by rinaldo d 1

For example, if you had a metal embedded in concrete, could you induce vibration in the metal at its resonant frequency, and have it loosen from its surroundings, without totally destroying the concrete, of course!

If you can provide links to back up your answer, that would be great.

2006-07-17 22:45:38 · 4 answers · asked by Song2 2

2006-07-17 21:20:42 · 4 answers · asked by Anonymous

So the earth surface spins, at about a 1000 plus mph, with a radius of about 4000 miles, and a rotation per day that would put a verticle centrifugal force on the person standing on the equator... if you sum the forces also taking into account gravity, that means the person would weigh less on the equator than the poles... because on the pole this centrifugal force at the equator would not exist... so i know i missed something but what is it?

2006-07-17 19:36:39 · 5 answers · asked by Jesters Deadd 2

I heard of a company in europe that makes and sells generators for about 12k. is it bs or are they just greedy corp. jerks realizing that if they just made one big enough it could solve the worlds energy crisis. No magnetic detereoration was claimed.

2006-07-17 19:09:34 · 11 answers · asked by brokolay 3

2006-07-17 18:58:30 · 3 answers · asked by khalidrisha 1

I'm trying to get the radius of the arch of a door?

2006-07-17 17:26:16 · 13 answers · asked by Chris B 1

these earth leakage monitors will be used to monitor powersupply

2006-07-17 17:24:08 · 1 answers · asked by queviji 1

2006-07-17 16:33:37 · 3 answers · asked by GZmale 1

What two materials provide the best level of static electricity?

Also what is the best way to convert it to useable energy?

2006-07-17 16:21:26 · 3 answers · asked by flackstar 2

I am able to clearly hear FM stations deep within my parking garage 2 stories underground which is sheilded with concrete..but not AM. Why is this?

Is it possible the vents/pipes are somehow acting like waveguides for FM but not AM?

Its quite amazing really. Any creative thoughts?

Thanx

2006-07-17 15:42:36 · 5 answers · asked by Anonymous

I heard about that electrical engineers designs radars and satellites systems.They use CAD or what to design this????

2006-07-17 15:06:02 · 2 answers · asked by The Apostle 2

2006-07-17 14:29:02 · 4 answers · asked by Jess 3

From when when it takes its first flight until its last flight flight? Just a regular airplane....

2006-07-17 13:28:15 · 4 answers · asked by Anonymous

Here is what I have 10 foot wind-tirbine, 40 foot tower,24vdc perm magnet motor, six 12v truck batt connected parallel.
its all set up and functions well with a autonotive generator(not altanator) ond app automotive voltage regulator.However doesnt produce enough power. and i have changed the automotive generator to a 24vdc perm mag lil racale motor. and my question is HOW DO I REGULATE THE VOLTAGE AS TO NOT OVERCHARGE THE BATTERYS I need to make a voltage controler or modify other inexpensive means or other inexpensive aplications. thank you in advance

2006-07-17 11:23:11 · 6 answers · asked by fred p 3

2006-07-17 10:56:31 · 1 answers · asked by edisons son 1

because it uses co2 to make oxygen

2006-07-17 10:30:10 · 3 answers · asked by Baby_brat 1

I have read that Tidal harnesse's can be used as clean source of ELectricity. Do you think this would be good Idea to put them where they are hit by Hurricanes since Hurricanes cause bigger waves in the Ocean?

2006-07-17 09:56:34 · 2 answers · asked by Anonymous

I want to play volleyball (either at club level or varsity level) but I am not sure if it is possible to have a strenuous major and play a sport.

2006-07-17 08:30:15 · 9 answers · asked by Laurathecarrot 2

2006-07-17 08:16:09 · 4 answers · asked by nj 1

2006-07-17 07:20:46 · 5 answers · asked by animalmother 4

I just graduated with a BSEE. All the jobs I have found want someone with 3 years experience. They also want someone to know technically specific things that I don't know. I know I can learn most of these things but I feel like I am unqualified. Any recommendations or rules about when to ignore their requirements.

2006-07-17 06:41:23 · 8 answers · asked by DoctaB01 2

2006-07-17 05:06:50 · 10 answers · asked by ALFRED 1

probably i m searching for running message display or digital watch or quiz buzzer

2006-07-17 04:55:17 · 3 answers · asked by Anonymous