Engineering - January 2007

2007-01-17 13:56:55 · 1 answers · asked by Anonymous

2007-01-17 13:52:02 · 5 answers · asked by Kevin G 2

2007-01-17 13:51:35 · 3 answers · asked by Anonymous

2007-01-17 13:49:38 · 1 answers · asked by Kevin G 2

I have j5ohms in parallel with -j5ohms. this gives me a fraction with zero as the denominator. How do I treat this parallel combination?

2007-01-17 13:41:38 · 3 answers · asked by rrossorr 3

2007-01-17 13:13:22 · 3 answers · asked by asrokol139 1

2007-01-17 13:10:27 · 2 answers · asked by Anonymous

2007-01-17 13:05:49 · 8 answers · asked by Dr.B 2

pllz i need it for my homework

2007-01-17 13:01:04 · 11 answers · asked by Anonymous

2007-01-17 12:44:27 · 3 answers · asked by jmetsdad 1

Does that mean older or current bluetooth chips will go even faster than the 2.0 version of 3mbps? What about future bluetooth chips? Will they be blue-wb chips that can accept pure bluetooth signals and UWB super fast signals? Where does the compatibility start and end?

2007-01-17 12:25:28 · 1 answers · asked by Ilooklikemyavatar..exactly 3

Given 6 white LEDs wired in parallel, each with forward voltage of 3.3v and drawing 20mA, using (3) 150 ohm/0.25W resistors, how long before a typical 9v battery dies? How do I determine this in the future?

FWIW, the schematic I'm using is the one created by the LED wizard at: led.linear1.org/led.wiz .

+----|>|----|>|---/\/\/----+
+----|>|----|>|---/\/\/----+
+----|>|----|>|---/\/\/----+

This shows 2 LEDs + 1 resistor connected in series as a group. Each group is then connected in parallel with one another.

My goal is to light this array to in a way that it is optimized for brightness and long battery life. The choice of 9v power source isn't a requirement: 1.5v AAAs/C/D cells connected in series is also legitimate.

2007-01-17 12:23:17 · 3 answers · asked by lazyweb 1

2007-01-17 12:15:41 · 7 answers · asked by Anonymous

We live in Midwest near Kansas City. During this first show of winter we had some snow, frozen rain, sleet, and colder temperatures. A few days after this we heard strange, unexplained popping (thud) noises no big cause for concern as they were not loud. Kind of like a snowball hitting a picture window. Two nights ago with no warning there was a very loud BOOM like a sonic boom. We thought it was an explosion how ever the 911 operator had no other calls, our neighbors heard nothing. The next day the weatherman stated there had been several calls of this happing in the area and explained that a roofer stated it was the ice thawing and refreezing sets it up and causes this however no one elaborated. What happened? Is there a name for this phenomenon? It was very loud. The coating of ice and snow couldn’t have been more than three inches. Our house is 27 year old ranch.

2007-01-17 12:12:23 · 1 answers · asked by fred f 2

2007-01-17 12:05:06 · 7 answers · asked by Anonymous

2007-01-17 12:04:55 · 3 answers · asked by go b 1

certifying body

2007-01-17 12:04:23 · 3 answers · asked by Anonymous

2007-01-17 12:01:02 · 7 answers · asked by Anonymous

i'am doing a project about Which building design is best in withstanding an earthquake so does anyone know a website i can go to. To find this kind of information and how to build it

2007-01-17 12:00:29 · 4 answers · asked by coshizzy 1

2007-01-17 11:34:32 · 7 answers · asked by Anonymous

2007-01-17 10:41:56 · 7 answers · asked by michelle25181 1

Please explain equipment used and process, also what is the coal loaded onto when sent back to be processed

2007-01-17 10:27:44 · 3 answers · asked by chocolateXXX 1

Hi, everyone I am doing a science fair project and thought about buildinga robot that can lift about 10 000Pa(Pascals). Is there any type of motor/ or engine that can do it? I need something like a remote control type of thing

2007-01-17 09:42:22 · 3 answers · asked by LEAFS ENFORCER 2

Here's what I'll buy from your company if you will just be kind enough to start manufacturing them. It probably won't even involve getting a new patent, just remake some things so they work better.

1) Stop making pencils, pens, lipstick, etc. in cylandrical shapes. I am tired of chasing them when they roll off the table.

2) Start making paper shredders with a handle on the top, so that they can be emptied without placing the top on the floor and spilling paper shreds everywhere.

3) I would like a smaller, quieter lawn mower. About the size of a vacuum cleaner.

4) While you're at it, I'd like garden tools for women. No, I don't want pink garden tools, just tools that utilize lower body strength instead of upper body strength. Example: put a foot bar on "the Garden Weasle."

5) Please make a small device whose only functiuon is to chime or beep softly every 15 minutes when motion is not detected. This device can be attached to car keys, remotes, or other stuff I lose.

2007-01-17 09:08:11 · 14 answers · asked by cancelcodeyellow 3

would i require test certificate if i installed mains operated with dc back up smoke/heat detectors in a 3 storey building.i will be renting the accomodation out.

2007-01-17 08:19:56 · 3 answers · asked by Anonymous

Our lava lamp takes 4 hours to properly get going! Any ideas to speed up the process?

2007-01-17 08:08:37 · 9 answers · asked by Helen S 1

2007-01-17 07:42:45 · 3 answers · asked by Zefram 2

I’m only a Junior in High School, but I do really well in and enjoy math and have always been interested in a space-oriented career and my dad recommends a career in engineering. I think Astronomical Engineering seems like an ideal career right now, but I would like some more information about it. I’ve searched the internet and now I’m hoping for someone to just have some more information about maybe schooling, salary, and details of what really goes on being an astronomical engineer.

2007-01-17 07:17:30 · 2 answers · asked by armageddon144 2

2007-01-17 06:59:07 · 1 answers · asked by giridher g 1

1)how do i work out the volume?
do i work out the rectangle first then the semi circle?
http://s10.photobucket.com/albums/a121/TurboD15/?action=view¤t=DSC00515.jpg

2)do i split it into 2 rectangles, triangle & a circle?
http://s10.photobucket.com/albums/a121/TurboD15/?action=view¤t=DSC00517.jpg
if the template is 3mm think, what is the volume in cubic millimetres?

cheers all

2007-01-17 06:39:55 · 4 answers · asked by boostedz6 1