Engineering - December 2007

Could somebody please help me understand my science project?

I need a circuit that has 2 switches that work independently in parallel. They could control anything, lights, motor etc.

Anygood sites out there with examples?

Anygood ideas?

:)

2007-12-15 11:13:40 · 3 answers · asked by cake.faced (?) 2

How much current can be drawn from a 1.5V AA alkaline battery? How much current can be drawn from a 1.2V AA NiMH battery?

2007-12-15 10:40:59 · 8 answers · asked by electric 3

The purpose of this experiment was to determine the effect of liquid densities on the height of the propulsion of a water rocket

I became interested in this idea when I was watching the launch of NASA’s rocket ship, and wondered if the density of the air and objects on-board affected the velocity of the takeoff.

The information gained from this experiment could help aerodynamic engineers because ________


I NEED HELP

PLEASEE :(

Does my purpose make sense? ^^

2007-12-15 09:27:28 · 3 answers · asked by Anonymous

coventional flow of current........................................

2007-12-15 07:39:29 · 11 answers · asked by Anonymous

Just looking for a well made tool to discharge capacitors in various electronic equipment. I know they are easily built, but I haven't see a nice commercial solution.

2007-12-15 06:57:09 · 4 answers · asked by Anonymous

Where can I purchase a high quality, cheap Tesla coil?

2007-12-15 06:26:00 · 2 answers · asked by John 1

Been over 15 years since I have been in school for this stuff and I never used it.
Please refresh my memory:

For an electro-Magnet- what is it that makes it most effective? Wattage, right?
I can’t remember which battery configuration is the (Ohms law reference would be nice)
One for more power- parallel or series?

Parallel is more wattage? Right? I am so ooooooold………

2007-12-15 06:05:10 · 3 answers · asked by There you are∫ 6

why the why power supply for most electronic components must be DC.

2007-12-15 06:00:35 · 5 answers · asked by i m coming.................. 2

i'm doing a project on the bridge of lions and its replacement bridge. i have to compare construction dates, construction costs, type of bridge, building materials, load, and volume. you dont need to tell me that, just a website that could help me with that info. the help is greatly appreciated. thank u so much!!

2007-12-15 05:34:33 · 1 answers · asked by Anonymous

How do machines know that you put in a coin?

2007-12-15 03:11:08 · 14 answers · asked by futuretopgun101 5

Which if either would reduce the ammount of my electricity bill?

2007-12-15 02:43:56 · 2 answers · asked by bereftcat 4

Whats the minimum distance from the ATS to the panels its supplying? Don't have NFPA 110

2007-12-15 02:36:24 · 3 answers · asked by WTF 3

2007-12-15 01:06:18 · 12 answers · asked by person 1

2007-12-15 01:05:09 · 8 answers · asked by Daphne Loo 1

can anybody provide me details of spike arrestor ( high voltage)
please provide details like circuit dig as i have to implement it in real as my project

2007-12-15 00:29:57 · 1 answers · asked by Amol 1

2007-12-14 22:18:57 · 7 answers · asked by nithya mahi 2

i don't really know the different..help me

2007-12-14 21:20:47 · 3 answers · asked by Amy Lyana 1

I am looking at moving into a new home. However it has overhead electricity pylons with electricity flowing through it about 50 metres close to the house. The developer states they have done research and its safe. However i am worried about long term risk of cancer.
Please advise

2007-12-14 17:49:05 · 13 answers · asked by hdastoor 1

Can it stand for high surge current with short duration, for example the starting current in a switching power supply??

2007-12-14 16:42:21 · 3 answers · asked by A learner 1

How much heat is required to melt 50 g of mercury at -45 degrees Celsius to 425 degrees Celsius. Describe the whole process from the molecular level. (melting point - 39 degrees Celsius, boiling point - 357 degrees Celsius, specific heat - 0.033 kcal/kg-degree C, heat of fusion - 11.8 kJ/kg, heat of vaporization - 292 kJ/kg)

2007-12-14 14:43:12 · 3 answers · asked by Anonymous

2007-12-14 13:53:34 · 1 answers · asked by PIERRE B 1

2007-12-14 13:26:29 · 2 answers · asked by Madhav D 1

2007-12-14 09:59:38 · 4 answers · asked by Jughead 1

a)no electric charges
b) only neutral charges
c)equal numbers of positive and negative charges
d)only postive charges

2007-12-14 09:44:58 · 7 answers · asked by Anonymous

Please help! Where can I find the info on how to build a popsicle stick bridge?. Does anyone konw how to construct a bridge?

2007-12-14 09:41:14 · 3 answers · asked by Anonymous

Oil tankers...Like the Exon valdis... bad example but you get the picture. when full of fuel (oil diesel petrol whatever) does it sit higher in the water acording to the pimsole line. I mean 50,000 tons of cargo that is lighter than water ?
No reason for the question just curious.

2007-12-14 08:24:10 · 6 answers · asked by Anonymous

I live in a city and well, its been awhile since I have been in school, but does anyone know what the 3 phase power is that sits ontop of the powerpole? Whether its delta or Y, How much volts to ground and between each legs?

They use this power to energize the transformers that provide 240/120 to residential customers. Thanks for all the help.

2007-12-14 05:39:29 · 5 answers · asked by Marion C 3

If power is the product of voltage and current (P= IV) and voltage is the product of current and resistance (V= IR), what equation gives the relation among power, current, and resistance?

2007-12-14 03:27:06 · 3 answers · asked by Shae 2

I know that Cor-ten B is equivalent to a588, but is it a588 grade a, a588 grade b or a588 grade c? Where does it say this?

Thanks!

2007-12-14 02:09:25 · 4 answers · asked by Shant 2

wat is a cross wind landing, is this same dangrous in passenger jets and airforce bombers,,,,, how pilots deal with it,,, how should passengers avoid the dangours in cross wind landinga.......

2007-12-13 19:02:48 · 4 answers · asked by daudzai 2