Engineering - August 2006

Thomas Alwa Edison who invented electrical bulb,used the metal toungston to conduct current in vacuum so that it emitted light.why did he use it in vacuum?

2006-08-18 09:35:42 · 15 answers · asked by satish ,the great 2

2006-08-18 09:19:46 · 6 answers · asked by Shahrzad T 1

I have an idea on how to build a machine that uses a power supply that is unlimited,and free,and absolutely nonpoluting. This machine will use materials that are readily available,but cost money I do not have. I know it can be done,and the only thing I have is the knowledge.I need someone willing to work with me,who has the resourses,or the ability to get them.My idea is so simple, so unbelevable,I can not understand how it has not been done yet.Then again it most likely has,but not allowed by the govmnt.They could not make money. Coal and oil power would all but dissapear. They said men would never fly,go to the moon,or live with a mechanical heart. This will work. Does anyone know how to get help ?

2006-08-18 08:40:24 · 17 answers · asked by Anonymous

Why 4 resistance is used in Wheatstone bridge? Why not 3 or 2
resistance?Tell me reasons.

2006-08-18 08:15:22 · 2 answers · asked by star123 2

I know a good bit about transformers from a theoretical perspective, but how are the windings made? What kind of insulation is used on the wire? How is the number of coils accurately counted? How are the taps accurately placed?

I guess this could apply to any wire winding as well, like in motors/generators.

Thanks!

2006-08-18 07:04:48 · 4 answers · asked by Ubi 5

The wheel in question is hooked directly to the motor shaft.
Sorry this is a noob question.

2006-08-18 06:25:41 · 9 answers · asked by whoevermeam 3

What is the average pressure drop per distance for 2" propane piping?
What is the average pressure in a 500 gallon propane tank when it is full?
-Are there safety concerns when bumping up the pressure 5 pounds if I use a direct burial line?
-What thumb rules will I need to know?
-How much propane will I need to last 9 days if I want to supply various equipment using approximatly 1.7million BTU/hr at peak operating times?

2006-08-18 05:22:52 · 2 answers · asked by dostallion 2

2006-08-18 04:22:27 · 1 answers · asked by murje at work 1

2006-08-18 03:43:26 · 2 answers · asked by ycaruss 1

Give pictures.

2006-08-18 02:42:45 · 6 answers · asked by Anonymous

2006-08-18 02:36:53 · 7 answers · asked by TOMMY C 1

2006-08-18 02:34:38 · 3 answers · asked by Anonymous

2006-08-18 02:02:45 · 11 answers · asked by OZZY 1

2006-08-18 01:43:20 · 7 answers · asked by OZZY 1

I would like to know how the very tall cranes are erected. The 'T' shaped one with large concrete weights at one end. Are they erected using the smaller mobile cranes first?

2006-08-18 01:20:19 · 8 answers · asked by Stephen F 1

inour home 1 phase power supply is given,but inour locality we alsop see the 3 phase line.of what purpose??

2006-08-18 01:20:08 · 4 answers · asked by Anonymous

2006-08-18 01:14:24 · 4 answers · asked by Anonymous

2006-08-18 00:48:56 · 11 answers · asked by ducky-mani 2

2006-08-18 00:46:56 · 12 answers · asked by ducky-mani 2

is it possible to join different materials with different properties into a single material with both the properties???

2006-08-17 22:39:58 · 9 answers · asked by koolfire 1

If anybody could refer a web site it would be better or either send me the details at jahanzeb_leo@hotmail.com. I have to submit this report within three days...

2006-08-17 22:17:31 · 2 answers · asked by Mr. J 1

perhaps something related to aviation management

2006-08-17 21:52:26 · 1 answers · asked by EliBuzi 2

2006-08-17 21:12:17 · 5 answers · asked by shalfaras n 1

2006-08-17 21:04:47 · 8 answers · asked by brokenhorse 1

Let m1, m2, m3 be the moments of [l1, l2, l3] of the order of 1,2,3, where l1>=l2>=l3>=0.
Let y = sqrt(3m2/(2(m1^2+m2)))
and z = sqrt(2)*m3(m2^(-1.5))
How to find an expression for the upper bound of y in terms of z?
Some results I current have are max(y)=1/sqrt(2) when z=-1, max(y) = 1 when z = 1. I have used Monte Carlo approach to plot the shape of max(y) vs z, and it is a strictly increasing upward-concave curve.

2006-08-17 20:45:31 · 1 answers · asked by back2nature 4

One of the mill bearing (outer ring) were found broken, and it's remedied by rotating damage portion (outer ring) and placing on the top were the load is less. mill details are as follows, continuous drum mill designed for wet grinding ceramic mixes, length 10.5Meters,diameter 2.9meter,main motor power 2 units of 250KW,working capacity 60000Liters,RPM 13,drum weight40000kg, grinding media weight.

2006-08-17 19:43:07 · 4 answers · asked by russel v 1

2006-08-17 18:09:34 · 2 answers · asked by Vakamudi 1

i am not sure if this is possible. Is there a simple home made photoelectric cells

2006-08-17 18:02:16 · 2 answers · asked by ed_nergy 2

2006-08-17 17:34:09 · 6 answers · asked by hollywood71@verizon.net 5

An Electrolytic Capacitor in series with a Resistor attachced to the
base of a transistor would provide a simple timing circuit, yes? What
is the formula to derive the needed Farads and Ohms?

2006-08-17 17:31:41 · 3 answers · asked by Anonymous