Engineering - August 2007

2007-08-13 18:07:21 · 3 answers · asked by deepak_8584 1

I understand how an antenna absorbs RF radiation at a certain frequency. What I need to know is, how does the electricity from an antenna get into a circuit? If it is just a piece of wire attached at one end, how does electricity go through it? I thought that a circuit had to be joined at both ends for electrons to go through it. Please help me understand how I could for example, charge a battery from radio waves. Thanks a bunch!

2007-08-13 14:49:30 · 6 answers · asked by Anonymous

Why is it that apparently just NASA's space shuttle seems to be experiencing continued heat shield problems, whereas the Russians NEVER report any such problems with their space crafts? Do they have better scientists than NASA?

2007-08-13 10:48:51 · 8 answers · asked by Bea 2

do you have one? have you noticed the difference?

2007-08-13 10:46:57 · 1 answers · asked by donna p. 3

2007-08-13 09:38:10 · 11 answers · asked by go UCLA bruins! 3

For more details, see my other open question.

2007-08-13 09:37:15 · 4 answers · asked by lllll 4

how do i isolate r1?

Vout = r2/(r1+r2) * Vin

Also: Where can i find a simple set of rules for isolating variables in equations of this type?

2007-08-13 09:25:29 · 5 answers · asked by antena 1

also what is e career span (meaning not so competitive) of a typical engineering career? say fieldbus..

2007-08-13 09:01:33 · 3 answers · asked by Anonymous

I need to know how to make real-world use of accelerometer measurements. We have a Summit Instruments 3-axis unit with a 1K rolloff frequency (hardware filtering cuts that back to about 100 Hz).

Just calculating gravity has proved to be more difficult than I had thought, as even with a very long low pass filter, I am still left with wiggles that can't possibly be from a change in gravity.

The integration error getting to velocity is huge, orders of magnitude larger than my known average velocity. Determining displacement remains just a dream.

I have had some success in caging my errors since I do have a known average velocity and can detect points in the data where all motion has stopped, providing me with some known zero velocity points.

Can anyone steer me in the direction of application-level references (theory books are pretty much useless)?

I keep running into Kalman filters. What is special about them and why would they be applied to the accelerometer problem?

2007-08-13 08:49:21 · 3 answers · asked by dogsafire 7

i have 5 tower cranes outside my window at different construction sites and they all position their cranes the same direction at the end of the day. is there a reason for this.

2007-08-13 08:49:02 · 4 answers · asked by joseph g 1

2007-08-13 08:16:03 · 3 answers · asked by Scotty Doesnt Know 7

Can a large amount of thrust be produced by a nuclear fusion Tokamak reactor or a magnetic mirror?
Since hydrogen is plentiful this would be the ideal fuel source. And since fusion generates a lot of energy, this would be ideal for propulsion.

2007-08-13 08:06:18 · 5 answers · asked by eoc1000 2

Yes Not a lead free operation I am running boards and I keep getting solder balls on some of the smaller resistor. Isn't there a process for this or what could I do.

2007-08-13 07:32:58 · 3 answers · asked by fortydogg_2000 1

2007-08-13 07:31:42 · 8 answers · asked by nasiruddin59 1

i want to ask u, how it could be collapsed?
what standard design and constructing that they use to construct the Minnesota Bridge?
is there any connection between the standard they use to construct the bridge with Load Resistance and Factor Design (LRFD), standard for steel construction design?
I'm so afraid if it happen cause steel constructions design in most Indonesia based on American Standard Design, n it taught in most university in Indonesia....
I hope there is no mistake...

2007-08-13 07:01:45 · 7 answers · asked by Tommy M 1

Surface area of what? Is it the area of the hollow circle created by the loop? The total surface area of the wound wire? Would a big loop, say, hula hoop size, with one winding, work just as good as a 4" rod inside the radio if the surface area of the windings were equal?

2007-08-13 06:36:37 · 2 answers · asked by Anonymous

Solar System feeds my equipment.My problem is in the RTU (Remote Terminal Unit ) which is used to send some data from a remote area . It is fed by DC through Battery Bank .
Battery Bank is fed by the Solar System. Many problems happen frequently because of the Battery Bank which is affected by the very bad ,hot , and sandy environment.

2007-08-13 06:01:56 · 2 answers · asked by cksnaan 1

where cud i get nuclear weapon deign ,parts....details....ne1 knows da exact site name......

2007-08-13 05:58:17 · 11 answers · asked by pras 1

formulae or analysis point of view

2007-08-13 05:39:08 · 5 answers · asked by pecroy 2

2007-08-13 05:35:16 · 9 answers · asked by roy g 1

2007-08-13 05:34:09 · 1 answers · asked by morrobless 1

It seems to be a well-paying to be a plumber.
I'm a sophomore major in electrical engineering now.But I am thinking of plumbers.

2007-08-13 04:30:57 · 6 answers · asked by Jason N 2

like power shortage solution: solar panels but they are already invented !!!!!!!!

2007-08-13 03:59:44 · 2 answers · asked by Vishwajit K 2

Hi Folks,
Being a power bod in the middle east, I found ultimate control.
Oh, not personally, but due to the systems to function from time to time. I need to shut off a town. If I cannot get the thing back up to speed - well, forget shops, supermsrkets, air-con, lighting, fuel pumps, no transport, nothing except what is retreivable in the larder, and a paraffin lamp.
I think that us sparks hould be given greater consideration.
And pay.

2007-08-13 03:55:37 · 5 answers · asked by Bob the Boat 6

Why and when sectional views are required? Could anyone tell me the steps to draw an arc tangent to two circles?

2007-08-13 00:47:07 · 3 answers · asked by JCHC 2

2007-08-13 00:07:35 · 4 answers · asked by Anonymous

I want to know the baisic of engine building. The parts needed, what they do and the cost. Plz keep in mind i know almost nothing about engines now so don't go conplicated. Treat me as if i'm 13.

2007-08-12 23:56:35 · 4 answers · asked by Hold_your_color 2

2007-08-12 22:25:01 · 3 answers · asked by Bossman ™ 4

2007-08-12 20:49:10 · 5 answers · asked by Anonymous

a copper wire around something with a spinnig magnet in the middle creates electricity. got it. but does the amount of electricity you make depent on the amount of wire wrapped, the size of the wire wrapped, the size of the magnet, or how fast its spinning?? hmm, anyone?

2007-08-12 15:34:48 · 5 answers · asked by Anonymous