Engineering - June 2007

Why is it difficult to have a circuit with both high current and high voltage?

I can't think how this would occur or why they are hard to meet!

2007-06-27 04:12:13 · 8 answers · asked by Anonymous

What are some of the factors that would restrict the mass of projectiles that can be launched from chemically powered launchers?

2007-06-27 04:09:53 · 1 answers · asked by Anonymous

How can i enter robot wars someone please reply i really wanna know coz i have a robot ready and i need to know how much it would cost for these parts:
Body: Wedge Dome
Locomotion: 2X Tank tracks
Power: Kestral K13 "samson"
Drive: Drakon Vlast X6
Weapons: pneumatic pick axe, Spinning disk
Armour: Titanium
Extra GB flag X 2

2007-06-27 03:49:34 · 2 answers · asked by Matty 1

Can anyone suggest a supplier of ultrasonic transducers/emmitters for submerged cleaning (UK only plz)

Thanks

2007-06-27 00:20:24 · 1 answers · asked by naiveidealist 2

2007-06-26 23:54:58 · 2 answers · asked by Anonymous

Are there any electrical switch that can be controlled via GSM

2007-06-26 23:39:50 · 3 answers · asked by fgk57 1

2007-06-26 23:16:09 · 8 answers · asked by dadras58 1

can I make earth in my house and connect it instead of the nuteral utility?

2007-06-26 23:01:34 · 2 answers · asked by DJ 1

I've met several senior engineers and have an impression that most (if not all) of them are allergic to NEMA. They prefer IEC for electric motors, even they dislike to see the word "TEFC".
How about you? Do they regard NEMA as "old engineering school" ?

2007-06-26 22:48:47 · 2 answers · asked by amrobyono 3

2007-06-26 21:31:40 · 14 answers · asked by shanu 1

2007-06-26 20:24:55 · 2 answers · asked by Anonymous

2007-06-26 20:06:26 · 4 answers · asked by Anonymous

The area of the four walls of a hall is 660 sq m, the length is twice the breadth and the height is 11 m.Find the area of the ceiling?
Options: (1) 200 sq m, (2) 300 sq m, (3) 400 sq m, (4) 500 sq m

2007-06-26 19:10:38 · 4 answers · asked by mridul m 1

The on/off needs to be pretty fast, almost like if you were shooting a paintball gun with it or something

2007-06-26 18:43:37 · 4 answers · asked by Anonymous

plz answer me it's urgent!!!!!!plz give me the admission procees!!!!

2007-06-26 15:53:04 · 2 answers · asked by Anonymous

I've got a 0.5hp rated ac motor controller, and a 0.5hp rated motor. 208V 3ph. I want to power up the motor's stator coils without the rotor inside of it (magnetic field experiment). When I try to run it without the rotor, the controller quickly goes into overload mode. Why? Does the rotor spinning actually decrease the stator current?
(note: I am able to run the stator from 0-10Hz, any higher and it overloads or faults)

2007-06-26 15:35:14 · 5 answers · asked by B W 2

NASA's Constellation Program will be testing the manned Orion Spaceship in a giant vacuum chamber. It will be sent to explore the Moon, Mars, and other parts of the solar system.

http://macrocosm-magbook.blogspot.com/2007/06/gargantual-vacuum-chamber-to-test-orion.html

2007-06-26 15:30:01 · 5 answers · asked by alvinwriter 2

i have an old RC car that i would like to convert into some type of robot.

is there any way i can use an old Lego RCX to control/program it

2007-06-26 14:27:59 · 1 answers · asked by mohawk_man_1 1

I'm doing a project on solar energy. The only thing I have not found was the efficiency of solar energy compared to other kinds of existing or future/possible kinds of energy. Does anyone know of any sites or any facts that would help me? It'd be greatly appreciated. Thank you so much in advance.

2007-06-26 14:00:05 · 7 answers · asked by Lina 4

2007-06-26 12:59:46 · 5 answers · asked by Anonymous

Crude oil is heated to about 1250 degrees farenheit. It still doesnt catch fire. I understand that gasoline is 'derived' from crude and am not confusing the two. Still, the crude oil has enough flammability to catch fire if it touches a direct flame. Yet, it withstands boiling upto such high temperatures. How? Why?

2007-06-26 10:18:36 · 4 answers · asked by Amit S 1

I have a solenoid valve just like this http://www.globalspec.com/ImageRepository/ProductAreaImages/2007/4/903/large.jpg and its rated 120 VAC/26VA (3 prongs, one for ground) . I also have a horizontal level switch for liquid like this http://germes-online.com/direct/dbimage/50279527/Level_Switch.jpg with rating 120 VAC/0.28 A (the switch will connect when the water level reach the target) normally open.

How can I wire them so that when the level reached the valve will close and water will not flow into the tank? The switch is inside the tank and the valve connecting the pipe for feed water. Thanks

2007-06-26 10:08:10 · 4 answers · asked by coza b 2

I have no clue how they work, and I get confused when someone tries to tell me. somebody smart talk to me with small words.

2007-06-26 09:39:29 · 7 answers · asked by hlotavin 2

I understand that if I use too little argon the weld comes out dirty or pitted, what do I need to look for with too much argon? Also, is my employer solely responsible for knowingly having an uncertified welder doing the supposedly certified work?

2007-06-26 08:01:35 · 3 answers · asked by Watch out! 1

sabozt@yahoo.com

2007-06-26 07:55:40 · 3 answers · asked by datscold 1

i want to major in engineering in college but ive heard its a lot of work...more than any major. Is this true? And if it is, why so?

2007-06-26 07:12:02 · 16 answers · asked by Anonymous

i want to know how to program a PIC16F877 chip from the pc

2007-06-26 07:03:51 · 3 answers · asked by Omid 2

I am from India. And India boasts of Indian Institutes of Technology (IIT's) as the finest and best in the world.

The Americans are proud of Massachusetts's Institute of Technology (MIT).

If you are from some different country, please name top tech schools in your nation.

I am looking forward for searching top Technological institutes across the globe.

I am anticipating more answers from Americans. Please name top engineering/tech universities in your nation.

Is it worth doing engineering from Oxford. I know Oxford is one of finest universities but is it worth for engineering?

Thank you for your comments.

2007-06-26 06:51:34 · 3 answers · asked by Anonymous

Some people claim it is used by NASA to generate power in space.Others claim it is ANTI-ELECTRICITY.What exactly is the TRUTH?

2007-06-26 06:25:19 · 20 answers · asked by sukhrams 1

Can I use 10w 30 for my Brown and Sharps screw machines? I am very leery of doing it having wrecked A VW 1600 by using a multi visc oil at -5 deg F.

2007-06-26 06:10:09 · 1 answers · asked by Anonymous