Engineering (Science & Mathematics) - December 2006

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how can i dim a fluorescent lamp using a sensor?

2006-12-27 11:10:41 · 4 answers · asked by Anonymous

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Materials science,help please?

An Al-2.5% Cu alloy is solution-treated quenched, and overaged at 230 C to produce a stable microstructure. If the Q (Cu particles) as spheres with a diameter of 0.00009 cm and a density of 4.26 g/cm3, determine the number of precipitate particles per cm3 ?

I would be very grateful for any solution or any suggestion of solution hints as urgent as possible.

2006-12-27 10:22:16 · 3 answers · asked by tyrannior 1

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In the photo "Lunch atop a Skyscraper" do you think they were up 59 stories or just a few feet from a platform

2006-12-27 10:20:45 · 2 answers · asked by u2u2dallas 1

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Can someone help me identify these fasteners?

spacer LTM carriage
8020-r-ss.423-1
WSHR FLAT SML NI 200
WFNI-10-.354
SCR,SKT,HEX,m3x6mm,SST, VENT, NYLOK

can you also tell me the abbreviations? thanks

2006-12-27 10:19:49 · 1 answers · asked by mimix101 2

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Should I continue with engineering?

I like the conceptual part of physics but I dont like the computation.

2006-12-27 10:14:26 · 7 answers · asked by anonymous2372000 1

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Will an engineering degree destroy my health?

I ask this because I am studying a lot. I don't have much free time. Can someone help me on my decision? I was thinking of switching to math or chemistry. I don't like physics

2006-12-27 10:04:00 · 10 answers · asked by anonymous2372000 1

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I need a science project idea for a 5 th grade by feb 3, 2007 help me!?

any anwers

2006-12-27 09:59:58 · 17 answers · asked by E cutie 1

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what do transistors mean?

2006-12-27 09:22:58 · 5 answers · asked by eng. 1

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What's the equation for total accuracy? If a sensor has 0.5% acc and a meter has 0.25%, what's total accuracy?

Say a meter is connected to a sensor, if the sensor has +/-0.5% accuracy and the meter has +/-0.25%, then what's the readout's total accuracy?

2006-12-27 08:15:35 · 4 answers · asked by ghmag 1

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Which is stronger, a solid rod or a hollow rod of the same material?

2006-12-27 07:55:16 · 7 answers · asked by Karin P 1

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Does the number of radios recieving a station's signal affect its coverage area?

2006-12-27 06:26:54 · 4 answers · asked by focusedmind 2

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electrically switched mirror?

I am looking for a vendor that sells a glass (or glass coating) that can be switched between being reflective and transmissive. I am not looking for just privacy glass, it needs to be reflective in one state. Any suggestions?

2006-12-27 06:26:38 · 3 answers · asked by jdarcyjr 1

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Wind Tunnel Testing and Full Size Similarities?

What needs to be taken into account when testing aerodynamics in awind tunnel, fore example Geometric and Dynamic Similarities, can anyone give a fairly detailed answer or a good webiste to reseach from. Thanks

2006-12-27 05:25:32 · 4 answers · asked by Arkle 2

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what is the need of studying stats?how does it help us in our daily life?

i want to understand how all these graphical reprasentations are used in our daily life.i want to know for what purpose people use it

2006-12-27 05:11:28 · 6 answers · asked by Jagjit Singh 1

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How can we calculate all types of storage tank?

storage tank like horizendal, vertical, cone, disc. how to measure the tones or liters.

2006-12-27 04:34:18 · 3 answers · asked by senthikumaran.p 1

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best field in electronics (job point of view)?

2006-12-27 03:23:43 · 5 answers · asked by Anonymous

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Help with my long model rocket please?

Im building a model rocket that is 6 feet long, diameter is 1 1/2inches, it weighs around 2lbs, I only need the rocket to fly 100feet without a nose cone. My father said I cant do it and If I can do it, hes giving me $1000. Im thinking of putting on 3 fins and 3 Dsize engines, one inbetween each fin. Im just wondering about the open tube, what affect will this have on the center of pressure? are 3 D engines overkill? I dont need it to go that high but I wont get the money if it cant take off. Thanx guys.

2006-12-27 03:21:28 · 3 answers · asked by xeraphile 3

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