Engineering - February 2007

If you think you have enough experiences in design, build and operation of a wind tunnel, and you are interested in helping me building one for my client somewhere in south east asia. Why don't you send me your cv and your expectation?

2007-02-20 00:45:14 · 1 answers · asked by Anonymous

what advantages do non metals have over metals?

2007-02-20 00:34:21 · 6 answers · asked by Anonymous

efficiency ratings for renewable energy resources?

2007-02-20 00:30:22 · 2 answers · asked by onukpa 3

I just wonder why the electric motor, like Brushless Dc motor or switched reluctance motor, cannot generate adequate electricity to charge the battery or other energy storages at the low speed? Someone told me that the charge efficiency of a motor is a function of motor speed and especially an electronic switch or circuit is used for controlling the output current. But I'm still totally off the board. Because I think since the rotor (armature) is still running, there must be output current to the energy storage, thus the motor can also charge the battery at low speed.
Oh! Please! Could somebody just explain what happened as the motor is at low speed?

2007-02-20 00:27:59 · 5 answers · asked by burningcalories 2

Ultra Filter Membrane

2007-02-20 00:12:42 · 2 answers · asked by Anonymous

If a circuit produces EM waves with frequencies ranging from 0 to a particular range, and if i have any EM operated device(say mobile, radio..) in the circuit's influencing area, will it jam the device????

2007-02-20 00:03:44 · 1 answers · asked by Prad. 1

the % of structureal mass and the significance of this on the wind loading on the structure

2007-02-19 23:53:23 · 4 answers · asked by nikkijaynes 1

The switches are out side the room and the lights are inside. You are allowed to use the switches but entering the room is limited to one time only.

2007-02-19 23:29:24 · 2 answers · asked by sam_samarasinghe52 2

The equipment was repaired by our company's OFE workshop which has experienced mechanics.
OEMs bolts were only used and no change in spacing from that of OEMs design and this is one of the rare failure encountered in the project

2007-02-19 23:20:59 · 2 answers · asked by sarma k 1

The valve is required on the steam wand of an espresso machine. It is to open and close after being switched on and throttle steam coming from a boiler without reducing the pressure in the boiler significantly.

2007-02-19 22:17:00 · 1 answers · asked by Anonymous

2007-02-19 22:16:07 · 3 answers · asked by Shajoon K 1

add all basic differences!

2007-02-19 21:30:36 · 16 answers · asked by Anonymous

2007-02-19 21:27:38 · 10 answers · asked by MaggerZ 1

2007-02-19 21:23:35 · 2 answers · asked by bogdan U 2

2007-02-19 21:18:54 · 1 answers · asked by Anonymous

I need the weight and minimum height of pontoon type floating roof tank for storing crude oil.

2007-02-19 21:07:47 · 2 answers · asked by Abu Zaka 1

For example if you have two pieces of same grade steel but heat treated differently and have different phase distribution. I mean one of them has 15% reatined austenite and the other one has 5% reatined austenite. Can we distinguish these two steel pieces with an electronic coating measurement device (their working principle is magnetic induction) if we have a sample that we know that it has - lets say - 20% retained austenite?

2007-02-19 20:43:22 · 3 answers · asked by yusis 1

Would it be to invent wireless electricity in the form the somehow electrons are floating about every where but only become charged when comer into contact with a special modulator on the chosen device.
This would be great and mean no more wires

2007-02-19 20:27:41 · 3 answers · asked by Anonymous

Would it be to invent wireless electricity in the form the somehow electrons are floating about every where but only become charged when comer into contact with a special modulator on the chosen device.
This would be great and mean no more wires

2007-02-19 20:27:27 · 4 answers · asked by Anonymous

2007-02-19 20:23:17 · 4 answers · asked by looloo 1

2007-02-19 19:51:20 · 2 answers · asked by Anonymous

2007-02-19 19:50:31 · 3 answers · asked by Anonymous

2007-02-19 19:41:05 · 4 answers · asked by soahmad1 1

The Storage Tank has water. The Thermostat and the heating element work properly. But before being cut off from the supply, it gives a pop or a sound like thatwhen we open the soda or any aerated bottle. I undersatnd the sound is that of the Air.
Why such sound? Is it harmful?

2007-02-19 19:29:24 · 2 answers · asked by Maverick 2

2007-02-19 18:38:03 · 6 answers · asked by ramghar36 1

to join engineering deapartment like ECE,EEE

2007-02-19 18:30:05 · 2 answers · asked by anita g 1

The Storage Tank has water. The Thermostat and the heating element work properly. But before being cut off from the supply, it gives a pop or a sound like thatwhen we open the soda or any aerated bottle. I undersatnd the sound is that of the Air.
Why such sound? Is it harmful? What is the remedy

2007-02-19 18:20:44 · 4 answers · asked by Maverick 2

2007-02-19 18:20:34 · 1 answers · asked by geek 1

Hi. I'm a senior in high school and I am most likely to go into the engineering field of chemistry. I wanted to know all the different jobs or objectives a chemical engineer would do during his or her work hours.

2007-02-19 16:08:33 · 2 answers · asked by dan 1

2007-02-19 16:03:50 · 4 answers · asked by looloo 1