Engineering - September 2007

2007-09-22 08:12:27 · 3 answers · asked by Anonymous

agraculture and mining or mechanical

2007-09-22 05:47:00 · 4 answers · asked by Anonymous

2007-09-22 04:38:19 · 4 answers · asked by Joseph C 2

if any other good course is there you can mention

2007-09-22 02:57:14 · 9 answers · asked by shanamen 1

2007-09-22 02:48:34 · 6 answers · asked by Anonymous

Please have a look at this photo
http://www.east-west-exchange.com/TrumpFrameConn.JPG
It is 25 pole PCB mounted.
I need to find the manufacturer or distributor, or at least what it would be "officially" called.

(...and please, don't tell me to go to Radio Shack....!)

2007-09-22 01:57:40 · 4 answers · asked by Marianna 6

do you know how to do binomial expanssion theorem?
can you solve this?
(4x-3y) squared
with solution. please help me

2007-09-22 01:42:02 · 1 answers · asked by chuchu 2

2007-09-22 01:21:45 · 29 answers · asked by yemo 1

how they are strted if it is not selfstart

2007-09-22 01:00:54 · 7 answers · asked by sreenu 2

5,500 crates of apples are in storage at 3'C. An addtional 500 crates enter the storage cooler @ a temp of 29'C and are chilled to storage temp in 24 hours. The ave.mass of apples per crate is 27kg & the crate has a mass of 4.5kg & a specific heat of 2.5 kj/kg-k. det. the product load in kw.

the book says 16.083 kw but i cant get to this answer.
please show me the process..

2007-09-22 00:40:17 · 2 answers · asked by Anonymous

whats the advantages of using a.c over dc current

2007-09-22 00:00:39 · 5 answers · asked by Anonymous

Is it realistically possible to braze steel using a standard propane torch?

Have any of you brazed something like a bicycle or a bicycle trailer, that has to take a conciderable amount of abuse, using just a propane torch and the standard tip?

I have gotten metal red hot using just a propane torch and a standard tip (a tip that might be used to solder copper pipes together) , Whether that was hot enough to braze with is the question.

If propane is hot enough to braze with are there any tips you may have to reduce the amount of propane used and to strenghten the brazed area.

2007-09-21 19:15:15 · 5 answers · asked by concerned_earthling 4

what is that machine you have to stand upright on because its vertical, has two wheels on either side of the base, its battery powered and has a hadle at the top?

2007-09-21 15:01:01 · 3 answers · asked by nursefeelgood 2

2007-09-21 14:06:47 · 11 answers · asked by j30bowden 1

I have to come up with a project for one of my "project" classes. The project class deals with communications. I got the "okay" to do a wireless controller. The schematic is here: http://www.bpesolutions.com/gadgets.ws/gproject5.html#anchor123361

However, instead of A and B inputs, I would like to make a very basic motion sensitive controller (probably just detecting a left or right tilt).

Is the addition of motion detection possible for a hobbyist? Can you recommend resources for this (I tried looking but can't really find anything). Thanks!

2007-09-21 12:26:11 · 3 answers · asked by Galbadian 2

usage of inverse function? What are the applications in real world

2007-09-21 10:44:29 · 4 answers · asked by c.wijaya 2

i was wondering what it will take to create a control module(i call it that because i dont know what else to call it) that can move a actuator up at the push of a button or down at the push of a diffrent button. also light a indicater light to tell what postion that actuator is in I.E
:postion 1 full closed
:postion 8 full extented.

2007-09-21 10:32:47 · 2 answers · asked by andrew00perez 1

2007-09-21 09:59:41 · 8 answers · asked by andrew r 1

Someone told me I need a positive voltage source to perform mesh analysis on this circuit:

http://img260.imageshack.us/img260/4665/deletemecircuituz9.jpg

Is this true?

I don't see how the voltages in the outer loop can add to 0.

I've solved this with nodal analysis but have not been able to with mesh analysis yet. The equations I've come up with are:

(both currents assumed clockwise)

i2 - i1 = Va/4
i2 = -1

I was thinking a Supermesh would provide the third equation I need but all I see from that is:

i1*2 + i2*3 = 0 but from the PSpice analysis I know this isn't going to lead to a solution.

Thanks

2007-09-21 09:49:34 · 2 answers · asked by John 1

2007-09-21 09:02:17 · 1 answers · asked by electrical engineer 3

I need a way to light up some light bulbs without having a socket to plug something into. I remember building something to conduct electricity when I was younger but we used a very small light bulb. Is there any way I could light up regular size light bulbs??

2007-09-21 08:48:23 · 5 answers · asked by purdue_softball12 2

Let me reword this. A 30,000 horizontally oriented gallon tank contains 5,000 gallons of anhydrous ammonia (NH3) at 70 F. 3,000 gallons of NH3 at -20 F is added to it. How long does the mixture take to return to 70 F?

The tank is 3/8" thick carbon steel.

The ambient room temperature is 70 F. Assume perfect mixing.

I tried this problem with a thermal resistance network and just got my temperature differences to cancel each other out.

2007-09-21 08:07:08 · 5 answers · asked by paco r 1

2007-09-21 07:23:37 · 3 answers · asked by Anonymous

2007-09-21 06:46:06 · 2 answers · asked by ade o 1

2007-09-21 06:40:05 · 4 answers · asked by dinesh k 1

i m in my final year mechanical engineering, i need to submit a project related to my studies like a six stroke engine or a joysitck operated wheel chair... can neone pls give me some innovative ideas for a different project wic are feseable....

2007-09-21 06:22:56 · 6 answers · asked by nik 2

I am trying to make a microhydro electric power device.
Could a guy use the motor from a power tool as a generator??? Any Suggestions?? - It is a class project and I am the teacher.

2007-09-21 05:52:01 · 7 answers · asked by Donald M 1

how to build a circuit for ac input voltmeter?
Is Digital Voltmeter for this website:
www.electronics-lab.com/projects/test/014

2007-09-21 05:43:55 · 4 answers · asked by lwy 1

In other words how would the world would b lyk if there wasn't an invention of cars..

2007-09-21 05:30:53 · 4 answers · asked by saleha v 1

I bought a second hand, mini sun bed to sustain a few bonsai trees, this winter, indoor. The sun bed has a build in transformer to power 6X40W fluorescent lamps, thus a 240W system (220V~50Hz). Unfortunately the UV-lamps do not emit the best spectrum needed for cultivation and growth. The lamps I need to replace the UV-lamps with, has to be 590mm in length, but the highest wattage, available in this length is 20W. I want to know if I am going to blow the 20W lamps if I replace the old 40W lamps. If so, why?

2007-09-21 05:18:59 · 3 answers · asked by matroosje 2