Engineering - July 2007

I find Fluorescent bulbs for a very low price, here in China. I'm thinking of buying some to take home.

2007-07-02 21:28:09 · 5 answers · asked by hunter 4

2007-07-02 19:57:29 · 6 answers · asked by raymund e 1

After spending the entire school year inside working hard at the university you decide to work outdoors in the summer so you take a job of picking fruit in an orchard.The farm provides you with a cart and a small tractor to haul the fruit from the orchard to the truck.the cart consistsof a simple box to carry the load and a single axle with two wheels.the axel is attached to the box using a leaf spring(k).While running this cart back and forth you have a few problems.the main problem is u have to drive over a curb and since u like to drive fast hitting this curb ends up bouncing half the fruit out of the cart.Cart masses 450kg fully loaded(with fruit).displacement of the spring is 5 cm between loaded and free length.You decide to model the cart as a planer model (ie u ignore the cart dynamics & collapse the two tyres & spring into one)& ignore the mass & dynamics of the cart tyres.
Propose a model for the system an write the charecteristic eqation for this model

2007-07-02 17:02:19 · 2 answers · asked by Anuj S 1

specifically, breaker box at service entrance, how many amps should i use for main breaker

2007-07-02 16:49:28 · 4 answers · asked by Anonymous

i am a high school sophomore. we have this research class and... long story made short, i'm part of a team, and we want to build a robot for our investigatory project out of old gadgetry.
the problem? none of us are familiar with electonics and programming. it's kinda dumb of us and yeah, well, some people would call us stupid, but the teacher's so excited and so are my groupmates so i'm not making a comment. but can anyone tell me if there is a book or a web site that can help us?
thanks!!

2007-07-02 16:36:28 · 4 answers · asked by sri mole 2

50.3 is subscript

2007-07-02 14:53:50 · 1 answers · asked by Bob Z 1

connecting headphones to a small battery gives (a rather unpleasant) sound, how come it doesn't work the other way? (my goal is to get some LEDs to flash to music) and for my testing i didn't use LEDs, i just used a small test lightbulb

2007-07-02 14:46:51 · 3 answers · asked by David 2

2007-07-02 14:05:09 · 2 answers · asked by truhap 2

2007-07-02 14:02:34 · 4 answers · asked by RICHARD R 1

All componets are 12VDC and an added circuit that turns on when the other turns off powers a buzzer of 10mA which I don't know the resistor for either so help would be appreciated.

2007-07-02 13:26:56 · 4 answers · asked by leolaushman 1

just wondering

2007-07-02 12:15:45 · 3 answers · asked by macgyver 1

just wondering

2007-07-02 12:12:47 · 3 answers · asked by macgyver 1

2007-07-02 11:57:44 · 4 answers · asked by KBBALL20 4

I noticed the voltage doubler in a conventional microwave oven and I read that it sends a negative-pulsed HV DC to the magnetron.

If the magnetron emits a negative electric charge is this because of the negative HV DC pulses?

If so, then I assume if the voltage doubler were arranged inversly then the magnetron would emit a positive electric charge.

Please correct me if Im wrong. Extra info will be appreciated.

Thanks.

Souces: http://www.gallawa.com/microtech/doubler.html
http://www.colorado.edu/physics/2000/microwaves/water_rotates2.html

2007-07-02 11:54:09 · 3 answers · asked by Joseph C 1

UMMMMMMMMMMMM WHAT ARE THEY IVE HEARD THE TEM AND I KNOW ITS AN ANCIENTN INDIAN INVENTION THING BUT WHAT INVENTION IS IT?

2007-07-02 11:34:07 · 1 answers · asked by Anonymous

Assuming that the capacitor is fully charged from an external source, and then connected to a dead or near dead battery, will the battery receive some charge? Assuming the battery is rechargable.

2007-07-02 10:35:15 · 7 answers · asked by techmaster7b 2

also if you have any spells either black or white tell me cause i have lost my book of shadows thankss!!

2007-07-02 09:22:16 · 5 answers · asked by Anonymous

I am thinking electronics.

2007-07-02 08:49:46 · 3 answers · asked by Anonymous

2007-07-02 08:14:28 · 12 answers · asked by DL 1

a squarewave with amplitude 9.6v.

a triangle wave with amplitude 130v.

2007-07-02 08:00:24 · 1 answers · asked by briarfields 1

Examples:

I cannot get my sunglasses out of the cubby hole in my dashboard if the car is in park because the gear shift blocks it.

The automatically activated soap dispenser on the sink in the men's room at work dispenses soap whenever someone places their hands under the faucet but doesn't dispense soap when one places their hands under the soap dispenser.

2007-07-02 07:35:36 · 7 answers · asked by ? 3

2007-07-02 07:33:02 · 5 answers · asked by eric s 1

in engineering drawing.

2007-07-02 07:15:58 · 1 answers · asked by lawrenz 1

2007-07-02 06:19:48 · 9 answers · asked by Magd 1

2007-07-02 05:42:12 · 7 answers · asked by Dheeraj G 1

I need to find out why a F6F-3 Hellcat reach mach-1 on a dive from 20,000 and 30,000 ft. Given information is Zero-lift drag is .0211, Wing area 334 sq feet, weight 12,441 lb, 1500 hp engine, Zero-lift drag at mach-1 .211, and propeller efficiency is .3 at mach-1

2007-07-02 05:23:50 · 4 answers · asked by Howard 1

2007-07-02 04:15:06 · 7 answers · asked by Anonymous

this is for an unusual application.. will be gravity fed from a tank, and only will have to push water about 6 foot above pump level.
must have 100psi and 2 gph.

2007-07-02 03:50:51 · 5 answers · asked by Stacy E 1

i am electrical maintenance engineer in a leading firm in power sector, but posted at remote place.

2007-07-02 03:21:11 · 1 answers · asked by ashish 1

I am trying to find a UK supplier of 4mm foam core UV stabilized thermoplastic to use in an experimental folding boat project. I also need to find a UK supplier of heavy duty UV stabilized reinforced ripstop nylon (waterproof). to make the fold 'hinges'. Can anyone help?

2007-07-02 02:48:21 · 1 answers · asked by martkimwat 1