Engineering - January 2007

the question says to find the integrating factor.

(12+5xy)dx + (6xy^(-1) +3x^2)dy =0

the little ^ indicate powers.... wasn't sure of the proper notation.

I can do the normal ones but this one seems to never cancel anything out......

any help apreciated

2007-01-28 13:03:27 · 1 answers · asked by james m 3

2007-01-28 12:49:00 · 8 answers · asked by Carrino 1

2007-01-28 12:32:59 · 5 answers · asked by ashish s 1

2007-01-28 12:27:50 · 9 answers · asked by Carrino 1

I take adderal to stay up late at night to study and do my homework i don't have add but i went to my doctor and told him that i think i have a.d.d. and that i think adderall would be good for me.

I was wondering if it is really that bad for me and is it considered cheating. I don't abuse or use it except only for studying which is just about a couple on the weekends and maybe 2 or 3 during the week. and there 10mg... also does anyone else do this to study if you do OR don't tell me your thoughts about it.

2007-01-28 12:17:30 · 2 answers · asked by Anonymous

2007-01-28 11:52:25 · 3 answers · asked by svdspecialist 1

2007-01-28 11:33:06 · 2 answers · asked by Ms. Love 2

2007-01-28 11:30:36 · 4 answers · asked by Ms. Love 2

We live in a manufactured home that rests on cinder blocks and are building an addition which will also rest on cinder blocks. But are wondering how much weight can be supported by one block so we know how many to purchase.

2007-01-28 11:27:46 · 3 answers · asked by stephanie3133 1

2007-01-28 11:04:33 · 2 answers · asked by Anonymous

2007-01-28 11:04:29 · 3 answers · asked by Anonymous

eh.. i'm not that creative - just trying to understand what you could really do.. magnetism.. processing.. would nanotech make use of power? `shrugs` just looking for theoretical ideas.. trying to understand theoretical possibility. thoughts.. amusement.. whatevr would be appreciated :P

2007-01-28 10:51:52 · 7 answers · asked by honorablepassion 2

eh.. just watching a bit of 'terminator' lately - kinda got me to thinking about our level of technology... dont quite understand where technology stands.. or what keeps it in check. a kid can build a little battle bot - why.. or why dont forces use mechs? does someone somewhere? or are they just waiting around for nanotech so they can build on a much more impressive level?
kinda just thinking to myself - wouldn't mind someone else's thoughts.

2007-01-28 10:38:17 · 3 answers · asked by honorablepassion 2

I need a voltage adapter that can take male end of the car vacuum-chord on one end and the opposite end to fit into my wall outlet with appropriate 12V to 110V conversion. THANKS!

2007-01-28 10:22:03 · 3 answers · asked by Himanshu M 1

it needs to be a component or assembly (amongst machine tool parts, tooling parts, automotive and aerospace parts, toys and household appliances). any ideas can help. thanks

2007-01-28 10:01:20 · 6 answers · asked by John K 2

how in the world do you even begin to build something as complicated as a trebuchet?? i mean its like a geometry nightmare!!! what in the world do i do? where do i start??

2007-01-28 09:54:41 · 9 answers · asked by musical_genius 3

size of wood required is it
3x2 inches 75x50 mm
4x2 inches 100x50 mm
NOT load bearing

2007-01-28 09:15:06 · 14 answers · asked by dublindutri 1

I used 10 000 watts a day. I want to buy a 480 watt system. how many batteries do I need to store the watts that I need. or do I need a bigger watt system?

2007-01-28 08:49:51 · 4 answers · asked by Rafael M 2

2007-01-28 08:03:19 · 1 answers · asked by joy 1

If a point is 390 feet from N33* 30.674 W 88* 29.450, 791 feet from N 33* 30.711 W 88* 29.229, and 773 feet from N33* 30.836 W88* 29.407, where is the point? Thanks!

2007-01-28 06:52:15 · 2 answers · asked by pater47 5

A ball is travelling with a speed of 35m/s when it make contact with a wall, if the contact stayed for 0.05s and the ball leaves the wall with a speed of 55m/s.

i) what's the change in momentum?

ii) what average force did the wall exert on the ball to cuse the change in momentun?

2007-01-28 06:47:34 · 1 answers · asked by Anonymous

in order to determine the velosity of an object you should take?
a. distance divided by time
b. time divided by distance
c. distance times time
d. distance + time

2007-01-28 05:26:27 · 7 answers · asked by tico 1

2007-01-28 05:22:50 · 1 answers · asked by Aldo 5

I have recently designed a new type of motor that can operate on small or large scale. It is clean and uses no fuel!! The only problem is I have no idea what to do with it or get my idea out. I have the basic premise for the blueprints, but I need a little help with the exact specifications. It will work, but the measurements need to be detailed still. I would gladly share credit with someone because I know there would be plenty of credit to go around. I don't have the resources to actually produce a prototype, but the science is sound. Anyone have any ideas on what I can do? I don't want to get ripped off, but I realize that this project is too large for me to do alone.

2007-01-28 05:15:18 · 12 answers · asked by Anonymous

Anyone knows of any natural distaster caused by human undeground infrastructure? For exemple, a city collapsing because of the underground structure.

2007-01-28 05:14:40 · 2 answers · asked by kiba_gaara 1

2007-01-28 04:29:05 · 4 answers · asked by death angel 1

2007-01-28 03:59:30 · 6 answers · asked by Anonymous

2007-01-28 02:06:46 · 2 answers · asked by Abhishek812 1

2007-01-28 01:51:13 · 9 answers · asked by gawa 1

What actually happens if I take a piezo or magnetic hf loudspeaker and raise the voltage past the recommended limit please?

2007-01-28 01:37:03 · 3 answers · asked by Anonymous