Engineering - August 2007

Please give the solution?

2007-08-20 22:50:24 · 5 answers · asked by jp 1

2007-08-20 21:11:26 · 4 answers · asked by ravi p 1

if the presence of the ground point in the circuit provides an easy point of contact for someone to get shocked..

2007-08-20 19:18:33 · 3 answers · asked by Anonymous

how much are scarp or dead egines worth,
was wacthing dirty jobs and they said they were at least $3000
each.
how much are they really worth

2007-08-20 15:41:16 · 3 answers · asked by mjdo0720 1

Does this works for you?

2007-08-20 14:55:18 · 3 answers · asked by larry newborn 1

what type of fuel do the model rocket hobbists of Palestaine use as fuel consdiering these things can go 7 miles and everything has has to be scavenged considering the trade embargo?!

2007-08-20 14:46:39 · 3 answers · asked by olie b 1

Someone used one once in an electronics sensor interface to a PC.

2007-08-20 13:00:39 · 2 answers · asked by winter_new_hampshire 4

2007-08-20 12:52:16 · 1 answers · asked by jessica b 1

ok this will be quick .
what is an sn 7490
and explain what it does.
the very first correct answer gets my vote so go for it.

2007-08-20 12:02:04 · 5 answers · asked by emc.squared 1

I've lost my calculator operation manual for the TI-92 Plus calculator. Does anyone know of a good URL for this calcuator's functions and operations? I can get the device to do all of the basic arithmetic operations and thngs like LOG and Ln functions. However, with Trig. operations and transendental functions, all I get is the equation organized and presented in symbolic form. Even when I make the equation equal to some variable, it doesn't give a "result" answer. I feel like there is one more step in the operation that I need to do but I have no idea what that step is.

If anyone has experience with this calculator, maybe you can tell me what it is that I'm doing wrong. That would be a really big help.

Thanks in advance.

2007-08-20 11:32:49 · 4 answers · asked by Bob D1 7

I'm working on a robotics project. I want to control the robot wireless through sending/recieving signals from/ to the robot using RF transmitter/reciever circuits. So I need some practical examples for these circuits in a range not less than 30 meters. If there is any other simple mean to control the robot wireless please mention it

2007-08-20 11:13:09 · 3 answers · asked by Amany O. 1

The house we just rented has no grounded outlets, but rather two prong non-grounded outlets. We have expensive electronics to plug in, so we would like some kind of surge protection. Now we have come up with a couple of options, and I was hoping to run some by you. First of, would simply buying a two to three plug adapter work? I do not think it would really solve the problem since the ground plug is simply going into the center screw which is not connected to anything; therefore, the surge protector would have no way to divert the current away from the electronics. Am I wrong in this assumption? Secondly, how about a ground fault connection interruptor (gfci). They are designed to compare input and output currents and trip the circuit if there is a discrepancy. Would instaling one of these-- mind without a ground cable connceted at all-- and then plugging a surge protector into it provide the required protection for our electronics?

2007-08-20 11:10:26 · 1 answers · asked by budgemano 1

I've heard: egg, cone, and cylinder with done top. Which of these would be most resistant? And what would be a suitably strong material?

2007-08-20 11:08:33 · 13 answers · asked by Anonymous

The first mechanical clock makers could have built clocks running counter-clock wise and we would have a reverted idea of the same concept. What is the technical or historical reason?

2007-08-20 11:02:29 · 6 answers · asked by Francis 2

2007-08-20 10:38:40 · 2 answers · asked by Bernie S 1

I work in a lab which deals with Radon Gas. Radon gas decomposes into radioactive solids which readily adhear to dust particles and the like. This lab was not being used for at least 2-3 years before I got involved. We have a radon monitor which gives an estimate of current radon levels. When I first started the radon levels were around 18 or 19 pCi/Liter. Which is about 5 times the acceptable level. Well I adjusted the exhaust tubing so that it expells the gas outside now, so it harms noone. However, during these 2-3 years before I was involved everyone on this floor was likely exposed to this gas and its daughter particles. Should I say something even though I have no proof to back up my claims? It may very well be that much of the dust in this lab is laden with radioactive particles. What do you guys/gals think about this?

2007-08-20 09:53:41 · 6 answers · asked by Anonymous

I'm an engineering student looking to design an aesthetically pleasing but durable light weight portable structure with tension fabric and a pvc pipe frame, but I'm not sure where to purchase architectural tension fabric. The structure needs to be large enough that it can comfortably house two individuals, but small enough that it could be erected by hand, so I'm thinking about 500 square feet of floor space and 10 to 12ft of verticle clearance would be ideal. Does anyone have a ballpark idea of how much something like that would cost? Any advice would be appreciated, and I am certainly open to suggestions for alternative materials if you feel these wouldn't be ideal for the application.

-Thanks
-James

2007-08-20 08:55:46 · 4 answers · asked by James333 1

Can someone with a M.S from a non-accredited program of engineering become P.E?

2007-08-20 08:15:45 · 7 answers · asked by civic06 1

I was watching T2 the other day and I seen John Conner hack into a ATM machine using a Atari.(I know this is just a movie)But I was thinking with all of todays computers and gadgets do people do this?If somone was good with computers and knew how the machine worked they probly could pull it off.I know people do this all the time with slot and vending machines.

2007-08-20 08:04:51 · 5 answers · asked by Anonymous

2007-08-20 08:01:29 · 2 answers · asked by lord_andys_new_id 1

2007-08-20 06:36:34 · 3 answers · asked by Anonymous

if u meet a person in the street and he told u that he is arabic
do u think that he must be muslim or u know the fact that there're too much christian arabs ????

2007-08-20 05:56:37 · 7 answers · asked by josieh3 1

Is there any reason they would turn off wind turbines in a wind field due to efficiency? I know the fans are braked if winds exceed a certain velocity and possibly due to energy needs they may stop some of them. However in a debate with a friend he argued that it would be more efficient and produce more energy to have fewer running versus more. This is counter intuitive can someone shead some light on this topic. I refuse to accept my friend logic.

2007-08-20 05:40:02 · 4 answers · asked by boobinhard 2

2007-08-20 05:03:00 · 2 answers · asked by anil k 1

Design an experiment using a radioactive tracer to evaluate the amount of wear of steel auto engine cylinders using different types of lubricating oils.

2007-08-20 04:50:11 · 1 answers · asked by Anonymous

My friends and I saw a small wind farm where we live in upstate New York and someone inquired why all the towers weren't spinning at the same time. One of my friends, who is known for telling the most outlandish stories, said they stop some of them to make the wind farms more effiecient because it prevents one tower from 'stealing' wind from another tower. Common sense, and an engineering degree, tells me this guy is a moron. I also did some searching online and found nothing about increasing efficiency by operating at half capacity. I guess this really isn't a question because I know he's an idiot but if there is anyone who works with these plants to back me up and confirm his stupidity that would be great. Thanks.

2007-08-20 04:47:13 · 5 answers · asked by lacrosse13bb 3

In an ideal, 100% efficient transformer with a single primary and a single secondary winding, the general relations are:
Vp*Ns = Vs*Np (voltage stepping relation)
Vp*Ip=Vs*Is, (power relation)
where V are voltages, I are currents, N are coil turns, and p and s are subscripts identifying the primary and secondary coils, respectively.

How are the general relations modified in the case of multiple secondary windings?

2007-08-20 04:22:03 · 1 answers · asked by Not Eddie Money 3

2007-08-20 03:09:16 · 7 answers · asked by rashmi d 1

I have some problem about how to calculate power for my system. i use water jet as prime mover to move the turbine. Here i give the spec of my system :-

Water Jet spec
1. Operation pressure = 40 bar
2. Suction Volume = 17litre/minutes

We know that to calculate power is equal H(head) x flow rate x g x Efficiency...But for my system i don,t know the best way to calculate power. If i used this spec to calculate power, the result that i get is to small. So hope you can help me to simplify this problem. Thank you.

2007-08-20 02:46:39 · 2 answers · asked by yie 1

i want to get one of my local library in nyc

2007-08-20 02:36:41 · 3 answers · asked by myboo257 1