Engineering - May 2007

2007-05-19 11:40:35 · 7 answers · asked by niceguy4u2meet20 1

is it impossible?

2007-05-19 11:23:09 · 3 answers · asked by Anonymous

2007-05-19 09:22:06 · 5 answers · asked by what ever ? 2

I know that the voltage from phase to phase is 380V when line power (phase to neutral) is 220V, this means 220*sqrt(3)=380, but how you can prove this formula?

2007-05-19 09:14:15 · 2 answers · asked by BFG9000 2

what is more economic in energy for to heat 1 liter water? Gas burner or electric heater? what is efficiency of gas direct burner and classic kitchen electric heater?

2007-05-19 07:41:53 · 3 answers · asked by yvanos 1

I was assigned this project where I have to plan a budget for an entire year...my role is that I'm an engineer at Pratt & Whitney...everything was easy except the clothing budget.What does an engineer wear to work???

2007-05-19 06:42:05 · 3 answers · asked by smrs 2

2007-05-19 03:15:19 · 3 answers · asked by nidhi p 1

a cup of coffee, a 10 gal aquarium, and bottle of ginger ale are on a
table. Which one has the greatest amount of air pressure on it?

2007-05-19 02:45:17 · 9 answers · asked by Saket S 1

2007-05-19 01:10:25 · 1 answers · asked by tina_307 1

can somebody help me design an integrator with the ff:

V0 = 5000 ∫xdt
where x = -0.004coswt and f = 100Hz.
kindly show solution to the design.
Thanks

2007-05-19 00:44:52 · 2 answers · asked by blue 2

can somebody help me design a differential op amp given:

V0 = -0.002dx/dt

where x = 2sinwt and f = 100Hz.
Please show computation. Thanks

2007-05-19 00:33:56 · 2 answers · asked by blue 2

according to your experience, how many inches can I make with a common pair of cylinders?

or how often acetylen cylinders should be refilled according to the jobs you have performed?

I know it's difficult to measure gas,

2007-05-18 23:37:19 · 2 answers · asked by z3po 5

I have a schematic diagram that I would like convert to a printed circuit board diagram so I can make it. Is there some software or a tutorial that someone knows of so I can learn how to do this? Or if someone was to do it for me what would be the expected cost? This is the diagram I want converted http://www.headwize.com/images/rychke2.gif

Also what is the white board in this picture called so that I can go and buy one? - note thta it is not my website http://members.home.nl/b.vandam/lonely/i2ceeprom2.jpg

2007-05-18 20:29:49 · 5 answers · asked by Anonymous

One electronic ckt. have one relay of 12v,200 ohm.and one IC ckt, operated by 12v, in its construction.
Then the questions are----

1) Is it possible to provide 12v regulated power supply to both IC and Relay coilusing single power supply with single regulator IC i.e. 4812..

(2) if it is possible , what are the ratings of transformer which i will have to used...

2007-05-18 19:51:22 · 4 answers · asked by Ranjit S 1

In an Air conditioner the gas used are of different no.s like 12 or 22. what this no. means and what is the difference in cooling effect?

2007-05-18 19:47:43 · 3 answers · asked by rajesh g 1

I want to do some AC experiments at 15 to 30 kv, not much power, interested in the onset of arcing. Dont mind if a fuse blows when it arcs. Can you suggest something cheap? I am of the impression that old microwave ovens have a transformer, do you know its output ratio? The ratio of nbr of windings one side to the other? Does it make sense to Use a number of them wired high side to next low side to get up to this ratio?

Better yet, what do you suggest?

2007-05-18 17:19:12 · 4 answers · asked by Richard K 3

2007-05-18 16:42:55 · 3 answers · asked by Anonymous

2007-05-18 15:29:25 · 1 answers · asked by khater s 2

Surely our household waste should be charged by volume, not weight.

Views?

2007-05-18 15:04:03 · 7 answers · asked by Anonymous

like when you drop the ball through the hole, when the ball falls through the hole does it count as a step?

2007-05-18 14:56:59 · 3 answers · asked by Anonymous

If I have a device like a laptop computer that can work both in the US( 120V) and in Europe (220-240V), will the batteries charge faster in Europe due to higher voltage? Or is there some sort of difference in amperage so the same number of electrons/watts are reaching the device in the same amount of time?

2007-05-18 12:28:12 · 9 answers · asked by theloniouszen 2

What is the formula to determine the rate of flow (gallons per minute) of water through 1/2 inch pipe at a given pressure?

2007-05-18 10:39:53 · 3 answers · asked by itsmyitch 4

WE HAVE ASKED ALL AROUND AND NEED HELP
WE WILL NOT HURT ANYONE

2007-05-18 10:19:18 · 5 answers · asked by JeffK 1

difficulty finding useful info!
Thanks!

2007-05-18 10:16:10 · 4 answers · asked by Anonymous

2007-05-18 08:44:39 · 6 answers · asked by constant q 2

how much money is need

2007-05-18 08:40:25 · 2 answers · asked by asghar bigdeli 1

Ohms equal resitence, the more ohms a conducter has, the more electric current it resists. Can there be an electric conducter that resists no current?

2007-05-18 08:28:44 · 8 answers · asked by joe f 1

benchmarking

2007-05-18 07:44:17 · 2 answers · asked by bear 1

Several of my CFL bulbs shorted out after a month of use and the seller said I voided the warranty because I placed a 200-watt equivalent bulb in a 60-watt maximum fixture, but the bulb used only 42 'effective' watts.

2007-05-18 07:36:25 · 6 answers · asked by Andy L 2

Would it be possible to power a small electronic device with a capacitor, like a laptop? What are the pros and cons of a capacitor versus a chemical battery? Any info would be appreciated.

2007-05-18 06:30:26 · 9 answers · asked by mrlexington 2