Engineering - July 2007

2007-07-12 21:03:04 · 2 answers · asked by Fiona R 1

2007-07-12 20:38:19 · 5 answers · asked by treatop 1

Hey I just have a conceptual question for ya. Can the instantaneous power absorbed by an energy storage element (Cap or Inductor) by a negative value? I'm just trying to get some answers to possible questions on a test I have coming up. My guess on this question would be yes it can, when it's discharging on the current is leaving the + terminal this disobeying PSC. Am I wrong?

Here's another one:

Is there any significant affect the RMS value has in relation to power absorbed by a resistor?

And lastly,

In a first order transient does voltage in an inductor always increase exponentially.

Just throw some answers at me with your thoughts, thanks!

2007-07-12 19:00:39 · 1 answers · asked by Gearz 2

2007-07-12 18:53:07 · 6 answers · asked by Anonymous

2007-07-12 18:47:58 · 3 answers · asked by iNa~ 1

Help in pushover analysis.?

Help in pushover analysis.?

Can any 1 tell me what pushover analysis is?
can we apply dis analysis 2 any type of structure??
Can v apply dis 2 elevated water tanks?
plz give me brief introduction on it.
Thanks

2007-07-12 18:44:49 · 3 answers · asked by Anonymous

there is a reservoir 3 meter high full of water with continuous supply. said reservoir was tap with 3 inches diameter continuous pipe up to 4 kms, then extended it by 4 inches diameter pipe up to 20 kms. the initial discharge was 32gpm. the pressure read at 4km was 150 psi at elevation 50 meters and the pressure at 20kms is 215 psi. the difference in elevation is 168 meters. Is it possible to produce higher quantity of water at the end of 20 kms?

2007-07-12 18:14:19 · 2 answers · asked by mark 1

I look at the middle pin and try to get my ball there

2007-07-12 16:26:00 · 2 answers · asked by alexhoops4 1

i need to power a stepper motor and i need to know the easiest way to do so. i know that under better conditions i would use a stepper program on a graphing calculator and a dcu but i have neither at the moment. can they be used without programming

2007-07-12 16:24:43 · 3 answers · asked by Mike H 2

diagram:http://images.google.com/imgres?imgurl=http://instruct1.cit.cornell.edu/Courses/ansys/truss/images/truss.jpg&imgrefurl=http://instruct1.cit.cornell.edu/Courses/ansys/truss/index.htm&h=312&w=300&sz=15&hl=en&start=97&um=1&tbnid=cCLuBluOnI1aJM:&tbnh=117&tbnw=113&prev=/images%3Fq%3Dtruss%26start%3D80%26ndsp%3D20%26svnum%3D10%26um%3D1%26hl%3Den%26rlz%3D1B2DVFC_en___PH208%26sa%3DN

2007-07-12 16:13:48 · 3 answers · asked by danilo g 2

Could you please recommend any good universities which can offer a degree on this subject. I have a computer engineering degree but over the years, my interest for steam engines has changed to a passion and now, an obsession. I want to learn about designing small steam turbines, its fabrication, material selection, machining methods etc. Can I learn all of this under one degree? Where? Thanks !!
( I think it is not possible to learn these stuff online, am I right?)

2007-07-12 16:11:58 · 6 answers · asked by azmil_electric 1

What's the name of that and what else could it do as well,what are some of the advantages of it?

2007-07-12 15:06:44 · 2 answers · asked by Anonymous

Just think no more traffic jams or accidents, sleep in late, eat a casual breakfast then teleport yourself to work in seconds. Never be late for anything again...LoL!

2007-07-12 14:20:44 · 8 answers · asked by Positive-Pixie 4

Please indulge an ME for asking this, but here goes. We have a building with a 600A, 120/208V service; what size transformers will the power company install.?This is an overhead service, so I assume they will use 3 single-phase line transformers?

2007-07-12 12:54:14 · 6 answers · asked by dcb30 2

2007-07-12 12:37:28 · 3 answers · asked by ~(•¿•)~™ 2

I saw once that it takes 3 MV/m to ionize air to make it conductive. Is this true? What is this value for distilled water under normal/average conditions? Is there such a value for water?

2007-07-12 12:30:38 · 1 answers · asked by kevinthenerd 3

If so, how high is it? What is the limit? Is it materials, techniques, or physics?

2007-07-12 12:29:11 · 6 answers · asked by Calvin James Hammer 6

2007-07-12 12:20:02 · 2 answers · asked by macdaddy 1

2007-07-12 10:52:05 · 5 answers · asked by Anonymous

What NDE method is more appropriate for stainless steel, carbon steel, copper, zinc, titanium, etc? In other words, given the type of metal, how do I choose the correct NDE method?

What does eddy current do? How is it better than say mag. particle?

Thank you.

2007-07-12 10:11:59 · 3 answers · asked by ahe03 1

'tunnel' is cut through the slightly larger cube. The smaller solid lead cube can now be pushed through this opening in the larger cube. Yet, the weight of the larger cube (now with the opening) is still heavier than the weight of the slightly smaller cube. How is this possible?

2007-07-12 09:22:58 · 6 answers · asked by endlessjoy 2

2007-07-12 08:20:49 · 2 answers · asked by Bud 1

An ammeter and a voltmeter of suitable ranges are to be used to measure the current and voltage of an electric lamp. If mistakes were made and meters interchanged, what will happen?

2007-07-12 07:42:39 · 4 answers · asked by vida 2

I have completed my +2 .I was not able to get admission to aerospace/aeronautical engg. in a recognized institute. Which other common branch shall i choose so that I will be able to switch over to the field of space science after my B Tech?

2007-07-12 07:21:48 · 6 answers · asked by Anonymous

About 70 stories high? 10,000 sqft

2007-07-12 07:21:31 · 3 answers · asked by bboyballer112 2

Is there a way to take an LCD Monitor and remove the actual LCD panel and put a device in place of it that will read the signals that the LCD controller is providing to the panel and reconstruct those frames back into a file of stills that can be imported into a computer?

2007-07-12 07:04:50 · 1 answers · asked by damien 2

At the equator, does water not spin when you flush the toilet? Because in the Northern Hemisphere it spins clockwise, and ni the Southern Hemisphere is spins counterclockwise. So exactly at the middle, does it just drop?

2007-07-12 06:52:17 · 4 answers · asked by ghilliemarine 2

We would like to begin building a high-psi pneumatic air cannon for tennis ball launching. Because of the high psi levels (>500psi), we would like to have a remote connected by wire to activate the burst valve. We will also be pressurizing by remote line feed as well so we are at a safe distance in case of rupture.

What type of valve should I look for at the hardware store to do this with, and what sort of electronic means could actuate this valve effectively on 12v power?

2007-07-12 06:33:54 · 2 answers · asked by Anonymous

What is the amount of pressure per square ft. per depth that dirt applies to say an underground tunnel. Example- if i build a tunnel that is five feet under ground, what would be the pressure exerted by dirt, say under the heaviest conditions ex- wet, rocky soil.

2007-07-12 06:06:36 · 2 answers · asked by man who is lost 2

Why do people use silicon in solar panels for solar cars? I know they're semi-conductors but what is the actual reasons.

2007-07-12 05:13:49 · 3 answers · asked by Vijay B 1