Engineering - January 2007

2007-01-02 09:13:07 · 2 answers · asked by bobbyg 1

and also please note some useful web site in this field !

2007-01-02 09:11:31 · 2 answers · asked by Mehran Z 1

ok, well my science fair project expierement is do on the 8th of january. i need help. i am doing an expierement on what type of lightbulbs will work best on plants. i hav 3 lightbulbs- a 60w eddison lightbulb, a 60w blacklight bulb, and a 60w clear lightbulb, which one do u think will work best? PLZ HELP AND THANK U (^.^)

2007-01-02 08:38:17 · 10 answers · asked by Zackery 2

As you know, a lightsaber can cut through anything. It can be a very dangerous weapon if you are not careful with it. So how can you make it safer?

2007-01-02 08:25:45 · 8 answers · asked by Anonymous

2007-01-02 07:38:35 · 5 answers · asked by carfan911 1

Plastics are of either synthetic compounds or of a more natural nature. When were they first invented?

2007-01-02 07:19:47 · 1 answers · asked by whitsky2001 1

Thanks guys,
I have changed the bulb, I have tried a higher wattage of bulb, and the intensity of the light does not go up???I have cleaned the whole stuff three times... any other idea?

thanks,
Nick.
the question for those who did not see it was:

Hi,
I am installing a lamp(2) on the way of an other lamp(1). Both are controled by a switch. It shows 120V, but the bulb is not very bright, why?
how can I fix this problem?
Thanks,
Nick.

2007-01-02 07:15:28 · 5 answers · asked by Nick P 1

Hi,
I am installing a lamp(2) on the way of an other lamp(1). Both are controled by a switch. It shows 120V, but the bulb is not very bright, why?
how can I fix this problem?
Thanks,
Nick.

2007-01-02 07:05:38 · 6 answers · asked by Nick P 1

i always thought the capacity of water ...6.1/4 gallons at 65 ferenheight,=1 cubic foot,is this right,and would this aply to propane liquid gas.

2007-01-02 06:47:18 · 5 answers · asked by tugboat 4

i have to make a chart

2007-01-02 06:17:13 · 3 answers · asked by Anonymous

Im using this radioshack relay:
http://www.radioshack.com/product/index.jsp?parentPage=search&summary=summary&cp=&accessories=accessories&productId=2062482&kw=relay&techSpecs=techSpecs¤tTab=features&custRatings=custRatings&features=features&origkw=relay&support=support&tab=summary
there is no mention that there is a diode protecting it, so is there a risk that it will damage my computer's PSU and compontents in the circuit? How can I prevent this, which diode and how to install it?

2007-01-02 06:12:44 · 3 answers · asked by amir_elmaani 1

what sine wave type or shape would be viewed on a osiliscope on a car alternator NOT useing the rectifying diodes,on a closed circit,and only useing one phase of the stator winding,i dont know the anser,because of the odd shaped field poles on the rotor,

2007-01-02 05:54:22 · 5 answers · asked by tugboat 4

i am engineering student and dont know what to join(computer science,electrical,communication,network)

2007-01-02 04:50:21 · 8 answers · asked by Anonymous

2007-01-02 04:46:20 · 4 answers · asked by Anonymous

2007-01-02 04:34:09 · 2 answers · asked by maha l 1

2007-01-02 04:09:16 · 6 answers · asked by Keelu 1

2007-01-02 04:02:11 · 14 answers · asked by Anonymous

I hate batteries as well as all of the crappy wires that run everywhere supplying energy to everyone's home and businesses. Wind mills are a joke - we will see them as totallly archiac some day. Can't we collect energy utilizing Tesla's concepts into fuel cells to supply energy to the world? Then we wouldn't need nuclear or coal or gasoline....or is this too good and reasonable of an idea that the major corporations would only want to silence anyone with such an idea -- as happened to Tesla. Unlike his time, we are passed being ready for this timely innovation!!

2007-01-02 03:49:38 · 2 answers · asked by K 2

How to solve crosstalk for two signal line at PCBA?
ex:save gap,save line length
Somebody can support something reference data?

2007-01-02 03:29:35 · 1 answers · asked by peter 1

since signals from the brain are made of electric currents, is it possible to use a computer of some kind to determine what size current is used for certain body functions

2007-01-02 03:01:25 · 4 answers · asked by Anonymous

plz help!

2007-01-02 02:42:08 · 5 answers · asked by Anonymous

2007-01-02 02:39:06 · 2 answers · asked by Aarthy 1

2007-01-02 02:38:16 · 2 answers · asked by amir_elmaani 1

2007-01-02 02:29:04 · 3 answers · asked by Anonymous

There is two circuits, and if one is active (flowing current) then it opens a switch in another. Some would say that is a relay, but the problem is, the circuit which activates that switch, only has a pulse. What I mean is the circuit is only complete for a short time, and needs to toggle the switch on and off everytime there is a pulse of current which flows through the circuit. The situation is a modern computer power button, which closes the switch when it is pushed, but when released, it breaks the circuit again. How can I make that circuit toggle the switch on the second circuit everytime current puslses through. For example, a pulse passes through, the switch is toggled on. Then another pulse is passed, the switch is toggled off. Then another toggles on etc.

2007-01-02 01:25:01 · 2 answers · asked by amir_elmaani 1

2007-01-02 01:04:28 · 10 answers · asked by Cheese G 1

given the following data f=60hz, Vinput=110volts, Voutput=220volts,P=1kw.

2007-01-02 01:02:34 · 3 answers · asked by alvin f 1

2007-01-02 00:49:10 · 2 answers · asked by dusicapapic 1

does anyone know what wave form shape is on a car alternator BEFORE it is changed to d.c ...is it like a saw tooth,square wave,full sine wave,half sine wave,distorted sine wave,probably non of these.

2007-01-01 23:53:35 · 7 answers · asked by tugboat 4

I just wana see what most people's answers are.
Remember to consider competitive averages and other such things.
And please use percentages, not GPA's or any other method to calculate marks.

2007-01-01 22:31:36 · 4 answers · asked by dodido 3