Engineering - August 2007

2007-08-31 23:26:19 · 6 answers · asked by gattu 1

I am a radio technician in the military currently deployed. We are having a debate about weither or not the Frequency range of the antenna actually matters. Example. I know if you have an antenna that is labeled 150MHz - 175MHz then that means your best receive will be in that range. But we have been debating and having a hard time finding it with all of our blocked internet sites on wiether or not it matters for the TX.

Please help and please leave some reference if you can.

2007-08-31 23:12:56 · 4 answers · asked by morfusaf 2

u send me what rating of power factor plant for 1000kva transformer

2007-08-31 19:44:53 · 2 answers · asked by Anonymous

i'm a 3year student taking electrical course. i have a problem with the power factor term.lets say when someone say, the generator generate 80kw at 0.8lagging power factor? what is it actually mean? what is the real power value? and what is the reactive power value? pls help...

2007-08-31 18:27:39 · 6 answers · asked by luckyguy 2

I'm looking for a valve that can be electronically controlled to open and close with a diameter of 1.5'(inches) to 2'(inches) and this valve must be able to withstand 20psi. Any websites or listings of stores I can go to would much appreciated. Thank you

2007-08-31 17:55:42 · 5 answers · asked by Dead Arm 1

May I know how is the drill holes placement ,
in circular ?
Any simple drawing for my reference?
Someone do this test in china and it works.

2007-08-31 16:06:22 · 3 answers · asked by colorfulbooks 2

Is the following correct?

1.) Permeability is the ability of a soil or aggregate to transmit fluids such as water and air that come into contact with it.

2.) Frost action will cause liquids contained in the pores of the soil to expand, pushing the soil particles upward, and hence, causing items embedded in the soil such as foundations to be pushed upward.

3.) The minimum safe depth that a foundation must be at in must be below the frost line to avoid causing the foundation to lift up. This depth is specified by the building code as .

Any thoughts?

2007-08-31 15:17:59 · 3 answers · asked by Confused about life 2

what is center taping of the TRANSFORMER?
plz solve the following problem.............
a 50 hz single phase transformerhas one primary winding and two secondary .the primary is rated as 22V and secondaries as 220V with a central taping and 600 V without any taping .for a net core area of 75 cm2.calculate the no. of turns of the three winding. max value of flux density is 1.2T ..

2007-08-31 15:09:52 · 3 answers · asked by chandra p 1

is it true cooking in microwave ovens is a serious health safety and risks issue? List some examples (from any personal experience) ??

2007-08-31 14:52:24 · 4 answers · asked by PikC 5

I am interested in buying an electric bike that has 2 batteries that opperate at 12v @ 10 amp hours. They are designed to work together to deliver 24v to a 450 watt (peak) motor at the front wheel. Unfortunately these are heavy SLA batteries, and I would like to replace them with state of the art Nanophosphate Litihium Ion batteries.

Now the kicker: I can only find 36v versions for use in DeWalt power tools (though they are very energy dense).

So what I am wondering is if I can buy 2 / 4 of these and wire them to deliver no more than 36v continuous to the 24v motor and will it improve performance or just burn up the components.

Also as an added question, if it is not possible to run 36 volts directly is there a controller that could accomplish this.

Thanks!

The motor is from Currie Technologies, specialists in electric bikes.

2007-08-31 11:26:18 · 3 answers · asked by SILVRSWT 2

2007-08-31 10:06:35 · 14 answers · asked by Taminatorr 2

2007-08-31 09:48:48 · 4 answers · asked by merya 1

i have been told this can only be done with three phase motors .
single phase dont handle it.

2007-08-31 04:21:41 · 8 answers · asked by Anonymous

k, im on my last yr in high school, and i am deciding on an electrical engineer. now my question is, is there a lot of physics involved? i check careercruising and it said that theres lots of math and science. also is it a safe and fun line to get into? lastly what is it that u do as an electrical engineer? o and one more...is the pay good.. lol thanks. best answer will get best answer

2007-08-31 04:03:59 · 7 answers · asked by Anonymous

velmurugan k

2007-08-31 03:47:25 · 2 answers · asked by vel v 1

send the book name that may contain some charger circuits

2007-08-31 03:09:19 · 4 answers · asked by di_eee 1

I use premium 200 smoke fluid from www.zoommaunfacturing.co.uk.

2007-08-31 01:11:53 · 5 answers · asked by Paine 6

Please kindly , in one or two differences .... even just clues

2007-08-31 00:11:58 · 8 answers · asked by The Assistant 1

2007-08-30 21:03:12 · 3 answers · asked by Anonymous

Floor plans for a building have the four corners of a room located at the points (2, 3), (11, 6), (-3, 18), and (8, 21). Determine whether the side through thepoints (2, 3) and (11, 6) is parallel to the side through the points (-3, 18) and (8, 21).determine whether the side through the points (2, 3) and (11, 6) is perpendicular to the side through the points
(2, 3) and -3, 18)

2007-08-30 15:26:26 · 1 answers · asked by Anonymous

2007-08-30 14:54:33 · 10 answers · asked by Eric D 1

2007-08-30 13:14:45 · 19 answers · asked by hotmail . 1

2007-08-30 12:55:36 · 3 answers · asked by KM 2

2007-08-30 12:29:35 · 3 answers · asked by Anonymous

2007-08-30 11:34:58 · 4 answers · asked by bhs2paint 2

I mean, if someone had a cellphone, could it be always on and never need a charge, just run off of electricity from satellite?

2007-08-30 09:42:00 · 6 answers · asked by Anonymous

2007-08-30 09:33:33 · 2 answers · asked by shar9950 1

i need ebooks concerning petroleum refining, sugar refining, design project for Chem Engg

2007-08-30 07:40:30 · 1 answers · asked by Stef 3

an existing 33 kv over head line, 100 km in length, with ACSR (DOG) wire insttaled, i need to add new loads for new consumers, what is the current carying capacity and the in amps and the max load in kva i can use in this case ?

2007-08-30 07:38:42 · 2 answers · asked by ELECTRICAL-ENGINEER 1

2007-08-30 07:26:48 · 7 answers · asked by kito m 1