Engineering - April 2007

Is this the same for aircraft and watercraft???

2007-04-11 15:28:57 · 3 answers · asked by lost 1

Basically have to do an alternate case study for our propylene plant......

We have about 200 lb/hr accumulation of methane and decided to see the cost effectivness of flashing it off before teh recycle loop.

Not sure how to determine certain variables...i'm using hysys.

our stream is entering the flash drum at 485 psi and 15 F.

Hysys is asking we input the inlet pressure and vapor pressure.

Not sure waht to do really. Drop the pressure before hand possibly??? Lowest temp we can cool our strema too is -40 F.

No matter what we do it says we have a negative absolute pressure. and it gives us a "can't determine delta P" message.

Even if you don't hysys, if you know how to determine the proper conditions, that would be helpful

thanks

2007-04-11 15:06:26 · 1 answers · asked by My name is not bruce 7

HW assignment

2007-04-11 15:05:03 · 3 answers · asked by George 2

By going from Room A to Room B once figure out which switch works which light bulb. You cannot see the switches if in Room B.

2007-04-11 14:54:36 · 3 answers · asked by Mercedes C 1

Ive seen it on youtube but i dont know exactly how they did it
I really need to know how they attached a Co2 canister to a piece of wood
URL:http://www.youtube.com/watch?v=WqYjG1-3RXM&mode=related&search=

2007-04-11 13:50:54 · 2 answers · asked by deigo 1

a)What is the maximum mass of iron(III)oxide that can be obtained from 3632 g (8.000 lb) of iron?
b)What mass of O2 is required to oxidize the iron to iron (III) oxide?

2007-04-11 12:40:11 · 1 answers · asked by wonderer 1

help

2007-04-11 12:13:52 · 3 answers · asked by jeffrey h 1

I am trying to build a refrigerator that will completely fit under my bar. This refrigerator will store at least two half barrel kegs along with space for other items I want to keep chilled. I have looked into having them cooled with a thermoelectric cooler, but was too inefficient. I am thinking about taking apart an existing refrigerator (compressor) and modifying it to work under my bar. Can anyone give me some advice on doing this? I would also be open to alternative cooling options. Thanks!

2007-04-11 11:29:50 · 3 answers · asked by Josh 2

The current in an RL circuit builds up to one third of its steady-state value in 5.00 s. Find the inductive time constant. Explain your work, and good luck! :)

2007-04-11 10:50:37 · 3 answers · asked by Anonymous

please:)...the more the better

2007-04-11 10:33:45 · 3 answers · asked by Anonymous

When in electronics labs I always see resistors with values like 47, 52, 58, 1.2k. Why are they not linear and nice, why choose such strange values?

2007-04-11 10:02:51 · 2 answers · asked by anime_insomnia 1

2007-04-11 09:29:10 · 6 answers · asked by mstaxlady 1

At a given instant the current and self induced emf is an inductor are directed from the left to right, with negative (-) on the left, and positive (+)on the right.

Is the current increasing, or decreasing?

The induced emf is 17 V and the rate of change of the current is 25 kA/s; find the inductance.

Explain your work, and good luck! :)

2007-04-11 08:52:35 · 3 answers · asked by Anonymous

A.provide a good ground.
B.have handy mounting brackets.
C.fit a template hole.
D.have the correct capacity.

2007-04-11 08:51:01 · 5 answers · asked by inthewakeofbloodshed 1

In a proposed telesurgery application the images will be transmitted at 2 x 10 8m/s over a round-trip distance of 900 km. The compression and decompression processes for the images will take a total of 22 ms for the round trip, and other sources of delay amount to 9 ms for the round trip. What is the total round- trip delay

2007-04-11 07:54:51 · 2 answers · asked by Andrea w 1

one dimension is ..
two dimension is a straight line
thre dimension is a bus r a car r xyz axis similarly
wats for 4D

2007-04-11 06:30:54 · 4 answers · asked by rakesh pipada 2

Using no more than 75 popsickle sticks, I need to build a truss bridge. I can use white glue, popsickle sticks, and string. It needs to hold as much weight as possible! Designs and tips are appreciated!

2007-04-11 05:43:14 · 8 answers · asked by Anonymous

any website that contains this kind of information?

2007-04-11 04:58:19 · 2 answers · asked by dexing 2

2007-04-11 04:39:39 · 17 answers · asked by Anonymous

2007-04-11 04:33:57 · 5 answers · asked by S O 1

What is a good DC Circuit Analysis textbook for a beginner with a BA in Mathematics with Visual Basic, Database Managment and HTML experience?

2007-04-11 04:28:43 · 2 answers · asked by robert f 1

I am designing a science project. I want to connect a red LED, a yellow LED, and a blue LED to a DC voltage source I want to demonstrate the effect on the lights when the voltage is reduced. Please explain the math to calculate the ohms and which wiring method is the simplest to use that will not adversely effect the life of the LED.

2007-04-11 03:44:13 · 4 answers · asked by canadiantaxinfo 1

2007-04-11 03:38:36 · 14 answers · asked by Anonymous

I have an industrial panel which I believe uses 200-240v, (i've only got pictures). I need to tap of a semi-clean signal which comes through a sensor, I believe this is also cleaned at the panel. I've thought of using a optocoupler to tap of the signal but the highest detection voltage i've seen is 24V. I am also a little worried about using a relay due to the fact that its very high speed and a Relay might be a little noisy.

2007-04-11 02:10:37 · 5 answers · asked by Anonymous

2007-04-11 02:03:36 · 1 answers · asked by sam 1

i need the clear explain on this terms with examples

2007-04-11 01:38:56 · 4 answers · asked by ARUN Kumar 1

2007-04-11 01:34:45 · 6 answers · asked by song gurl 3

I am interested in two fields ie Mechanical engineering (I love mechanics) and BME (I'd love to work in a medical field)....but I feel I should undertake BME rather than the other but I do not know which one has more oppurtunities for getting a job! Infact I really want to know what these two fields actually relate to ......

2007-04-11 01:27:01 · 7 answers · asked by Daniella 2

2007-04-11 01:22:27 · 5 answers · asked by ammi 1

for single ply, multi ply, and cured and uncured panels?

2007-04-11 01:13:07 · 5 answers · asked by mickeys12 1