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- The design, building, and use of engines, machines, and structures. For any engineering topics not applicable to the categories below.
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Jan16-12 Greg Bernhardt
We always have threads on various pieces of the puzzle, but what I want here is for people to post a coherent plan of...
T 06:11 AM
johnbbahm
1,042 239,645
You're just one click away from posting your homework help request! Click here to post.
May17-14 06:51 PM
Redbelly98
0 2,914
A number of questions, particularly involving homework, often involve some basic engineering. In the US, the...
Nov22-13 02:02 PM
rneale
38 62,356
Basic electricity is often explained using the so called water/electricity analogy. This works, but I've never...
Sep29-10 06:37 PM
TSN79
17 8,194
I've been reading a book on step motors. There is a equation: L1-L0=(2^0.5)*L3 L0: leakage inductance L1:some...
Sep28-10 07:31 AM
law&theorem
0 2,019
Hi I am having trouble to measure the volume flow of a rebound valve with a venturi flow meter. The valve itself...
Sep28-10 04:51 AM
SamTaylor
0 1,907
Fairly basic question. Within the constraints, do the variables have to be all to one side? X1 + 2 > 3 is a...
Sep28-10 02:56 AM
bobbo7410
0 2,193
G'day everyone, I was not sure where to exactly post this question, but here goes. I am currently doing some...
Sep26-10 06:30 AM
Daever
1 1,679
If you look at a engineering stress-strain curve compared to the true* stress-strain curve of a steel for example,...
Sep25-10 05:47 PM
stewe
3 23,750
Hello all. I've been wanting to build a Stirling engine at home out of parts that i could easily afford/scrounge up....
Sep25-10 04:11 AM
Drakkith
19 8,719
how to define different material in ansys workbench by mesh attribute.
Sep24-10 06:13 AM
hitesh verma
0 3,015
Hi, I'm trying to understand the viability of making or having made - a hot -mould that can resize the neck of a...
Sep24-10 04:47 AM
shawnreit
5 2,663
What applied science has the potential to cause the greatest societal advance in human history?
Sep23-10 04:01 AM
Danger
19 4,499
My truck was rear ended. It has a steel and chrome bumper, the vehicle that hit it has a soft bumper, and was...
Sep23-10 02:48 AM
Danger
7 2,914
When hydrogen combusts it is turned into h20. H20 can be broken down into hydrogen and oxygen. NASA has been using...
Sep23-10 02:47 AM
Drakkith
36 11,249
Hi, I'm having trouble producing 22 AWG polypropylene cable. I keep on getting "missing insulation" and "reduced...
Sep21-10 05:22 PM
jpckmg
2 3,120
What a stressful evening. I figured I wanted to do a pretty complex valve system just to learn a bit, using solenoids...
Sep21-10 02:46 PM
turbo
14 2,638
Hello All, I have a quick question for you. I have small sample of a cement-like-like-material and I am high shear...
Sep21-10 10:55 AM
nvn
6 4,226
I'm an EE with a fried brain right now, how would you describe the device in the attached picture in technical...
Sep19-10 09:34 AM
Dr Lots-o'watts
3 2,900
This doesn't have to be exact. so if a some what simple formula might do the job, great. I am requesting a...
Sep16-10 03:21 PM
VA80232
5 2,480
Hi, I am having a doubt with centre of buoyancy. I referred some books but still the doubt is not clarified. ...
Sep14-10 10:50 PM
jnanesha.ks
6 6,852
Here is the deal, we are testing a 24" pipe for leaks doing a pressure test. the pressure at the pipe in question is...
Sep14-10 02:45 PM
zgozvrm
3 6,393
This may be a silly question, but... I recall one of the points of failure in the Deepwater Horizon's BOP was the...
Sep13-10 01:20 PM
stewartcs
3 2,196
I need help finding a device that can generate a sustained arc while utilizing only a 12 volt power source. Does...
Sep11-10 07:39 PM
berkeman
19 3,352
I wasn't sure exactly where I should have posted this but here I go.... I was reading that Voltage is a measure of...
Sep11-10 07:11 PM
DJM111188
3 2,852
I have an enclosed back porch with a concrete block foundation that must be replaced. It`s foundation is separate from...
Sep11-10 12:28 PM
nvn
1 10,447
Hi everyone. I'm supposed to do an interview for my Principles of Engineering class. If anyone wants to help out...
Sep10-10 05:35 PM
berkeman
1 1,465
I've been running it through my head almost constantly for awhile now if engineering is the right choice for me and...
Sep10-10 04:58 PM
Meadman23
0 1,011
In my thermodynamics book it states that the first law is, " When a system undergoes a complete cycle the net heat...
Sep9-10 08:57 AM
Topher925
3 1,872
I have a plan for the private colonization of the moon. My plan includes 5 aerospace companies they are 1.SpaceX...
Sep8-10 11:19 PM
russ_watters
15 3,599
I am designing a prototype of my patent and I am a little stuck. The main part of my prototype involves the use of a...
Sep8-10 12:44 PM
gloo
21 3,669
Hi, I am a second year civil engineering student. I have decided I want to learn a language that will help my...
Sep8-10 02:35 AM
fatra2
1 1,635
If you had a pressure vessel with an end-cap welded on and this girth weld was to fail, how might you calculate the...
Sep7-10 09:09 PM
john.phillip
1 2,904
Well i been doing engineering for a while but i wanted to know what should i start learning if i want to go father or...
Sep7-10 02:24 PM
dr dodge
4 1,813
Hi all, I am trying to upgrade my car's audio system. There are kinds of free air loud speakers. I am not what...
Sep7-10 01:47 PM
dr dodge
3 4,403
I'm reading a book on step motor. There is an equation: F=\phi2\frac{dR}{dx}/2 F is mmf \phi is flux I don't...
Sep7-10 09:38 AM
law&theorem
0 1,356
Ive got a beam that I cant seem to calculate the loading of. Lets say beam ABC supports are at A & B, BC is a...
Sep7-10 03:45 AM
Wetmelon
3 4,572
If I have a beam tilted at an angle with a weight hagning off of one end and it is fixed on the other (see...
Sep6-10 06:23 PM
john.phillip
3 1,707
Hi, I am trying to design a small machine that lowers a raised weight slowly. For example if i raise the weight by...
Sep6-10 01:30 AM
Danger
2 2,181
I was wondering how long would it take to charge a capacitor at 5volts if there are 4 parallel. This is the details on...
Sep5-10 10:00 PM
pixel01
4 2,136
As a fun project, I'm trying to design a mechanical machine as simple and elegant as possible to "crease up" a round...
Sep4-10 11:48 PM
Danger
20 3,144
Looking at the steam tables I see that the entrolpy of steam at a constant temperature increases with a decrease in...
Sep4-10 05:46 PM
Feliks
27 17,078
Hi I am new to refregration field please help me to calculate / design for the condenser coil evaporator coils based...
Sep4-10 02:10 AM
Balan Suresh
0 1,380

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