Engineering - April 2007

2007-04-24 10:48:14 · 2 answers · asked by Cutie 4

Finals are today and this is the only thing I am questional about....Thanx for your help!!!!! electircal student

2007-04-24 10:40:08 · 3 answers · asked by Anonymous

2007-04-24 09:51:38 · 3 answers · asked by A B B A 2

I go through the san francisco bay to Oakland sometimes and I was wondering if the tunnel gets built in the water or do they dig a tunnel in the earth underneath the water? and what happens if a earthquake would hit an you were down there, would it be like Indiana Jones temple of doom with all that water shooting down the tunnel?

2007-04-24 09:48:58 · 4 answers · asked by teamjesus_ca 4

2007-04-24 09:08:30 · 2 answers · asked by Xura 1

•Only one car can be crossing at any given time.
•A car should be allowed to cross the intersection only if there are no cars coming from the other street.
When cars are coming from both sides, they should take turns to prevent indefinite postponements in either street.

Can the above question be coded in C++ and how?

2007-04-24 08:47:54 · 2 answers · asked by kibwe p 1

according to my knowledge generators are dc machines but yet how are they connected in our homes/offices where ac power is used?

2007-04-24 07:30:57 · 10 answers · asked by Anonymous

For those of you who do not know, that is the green coating. I've tried acetone and it has little effect. I need a chemical that will do it, not a mechanical method like scraping or sanding. I need to preserve as much of the actual printed circuit as I can.

2007-04-24 07:28:27 · 3 answers · asked by Back Porch Willy 3

which of the following are not characteristics of colloidal particles

a. exhibit Brownian motion
b. have an electrical charge
c. settle upon standing
d. scatter light

2007-04-24 07:20:38 · 4 answers · asked by Sam 3

suppose you had a completley air-tight room with ventilation system that was closed until a certain amount of air pressure was created it could open and suck out all the air as fast as possible and then push fresh air back in.

i wish to create air-tight room in which if a fire is lit and the air will heat and start to expand the pressure valve, as on a ship uses to open when a certain amount of water pressure builds up, will open and then a fan of some sort can suck all the air out extuingishing any fire and then push air back in to preserve any life left in it if possible

i imagine it work a little something like this
when the fire starts the air will expand the lightly pressure sensitive vent opens air is sucked out the fire is extuingished air pressure builds up even greater in the room another vent opens air flows back in
i would like to know if this is possible and how it would be accomplished

**thank you in advance**

2007-04-24 07:03:42 · 3 answers · asked by lots_of_pie 4

how does it work exactly?
what are it's components? what is it connected to in the plug ( which part of the plug is connected to the timer)? how does it control the turning on or off of the electricity?
the timer is meant to turn the electricity off every 3 or 4 hrs to prevent current overload.. or overheating. so the plug would continue working properly

please please please.. if anybody has any idea please reply!

2007-04-24 06:55:51 · 1 answers · asked by xoom 2

We can send men to the moon. We can develop life in a test tube. So, why can't we make a vending machine that will take a wrinkled dollar bill?

2007-04-24 06:20:31 · 1 answers · asked by Kenneth B 3

2007-04-24 06:09:23 · 2 answers · asked by Anonymous

2007-04-24 05:49:42 · 1 answers · asked by wiggy 1

I use products such as the Automotive-Standard Circuit breakers from http://www.waytekwire.com/index.htm. On the circuit breaker there is a label stamped on either side of the breaker. It is stamped BAT and AUX. My question is why does it matter which dirction current flows through a thermal circuit breaker?

2007-04-24 05:30:32 · 3 answers · asked by twoskinsoneman 2

I'm an electronics guy and have designed everything I need to have a computer mow my lawn.... the problem is I don't know much about mechanical engineering/how to make the mower propel itself. Any ME guys have suggestions? Thanks!

2007-04-24 04:39:39 · 2 answers · asked by mdigitale 7

2007-04-24 04:21:18 · 15 answers · asked by Anonymous

2007-04-24 03:41:25 · 1 answers · asked by lewis b 1

I need a block diagram based on an op amp, where a red light comes on if the temperature rises above 20 degrees and a green light if it drops below 20C, on the output of the circuit.

2007-04-24 03:16:50 · 1 answers · asked by Anonymous

If L(y)= y''- 4y' + 13y = e^(2x)sin(3x) with y(0)=5 and y'(0)=9. Find a formula for y using convolution. I searched other questions but couldn't find one exactly like this one. Any help is appreciated

2007-04-24 02:46:50 · 4 answers · asked by tet169 1

2007-04-24 01:55:10 · 1 answers · asked by Sasoke 1

i am building a cantenea and need 12 gauge wire but i dont know how thick it is. i have a micrometer to measure, but dont know what size to look for.

2007-04-24 00:17:31 · 7 answers · asked by Penny D 1

2007-04-24 00:00:03 · 5 answers · asked by dharanesh y 1

2007-04-23 20:42:30 · 4 answers · asked by muthu d 1

the resistance to the motion of a car of mass m is proportional to the square of its velocity.the power being applied is P.How much distance will the car cover while it accelerates from v0 to v.k is the constant of proportionality and resistance=kv2

2007-04-23 20:21:38 · 4 answers · asked by Nit 2

2007-04-23 19:14:46 · 4 answers · asked by Anonymous

2007-04-23 19:13:03 · 4 answers · asked by Anonymous

2007-04-23 18:11:51 · 2 answers · asked by markravi l 1

2007-04-23 17:41:48 · 3 answers · asked by golfnut34 1

Basically designing an addition to an olefins plant all year. Pretending there is some new awesome technology that lets us produce propylene for a profit. Designed the pumps..about 6 distillation columns, compressors...heat ex...etc.

Suppose to treat this like its the real world.....in the final process of putting together the report we would give to our boss (prof in this case).

Prof likes to pretend he is the real boss and says in real life you wouldn't ask your boss questions.....so he's not really available to answer them.

ANyways...this is what it says to include in our final presentation in terms of safety.

*********************************************************
Discuss some of the Safety and Environmental aspects of the process. Include both process operating concerns as well as toxicity/flammability for specific chemicals.
**********************************************************

2007-04-23 16:52:26 · 2 answers · asked by My name is not bruce 7