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Engineering - February 2007

[Selected]: All categories Science & Mathematics Engineering

Thermoelectric cooler does not need a compressor and freon. it needs a low DC voltage.

2007-02-28 23:48:39 · 3 answers · asked by mc_gyv 1

What I mean here is that how will hyperbolic geometry prove that the sum of the angles of a triangle will not be always 180... How could it be since we all know that it's 180 based on Euclidean geometry?

2007-02-28 23:27:07 · 2 answers · asked by Anonymous

2007-02-28 22:02:26 · 3 answers · asked by olugboji o 1

i am working on a diffrential amplifier but i cannot quite understand what slew rate is and how it affects the output. thanks in advance.

2007-02-28 22:00:29 · 3 answers · asked by Anonymous

2007-02-28 21:14:33 · 5 answers · asked by mahat jalan 1

I want to implement a very large DIRECTED graph consisting of about 20,000 nodes to begin with. Each node shall have a maximum out-degree of about 15. In-degree can be limitless. But in general for most nodes, both in-degree and out-degree wont exceed 8-10.

The graph should have have support:
1. Extremely fast searching of nodes
2. Fast traversal from one node to another, provided we know which direction to proceed via.

What is the best way to store and implement such huge graphs on the computer? If possible, I would also like a GUI to manage my graph so that I can keep track of it's current status and also make changes to it if need be.

I am sure many existing software are existing which cater exactly to such requirements.

Can you suggest me which software I should use for my implementation of this kind of a graph?

2007-02-28 21:08:47 · 1 answers · asked by Gaurav Gupta 1

i wanna like be a jedi n s***=P

2007-02-28 20:49:28 · 3 answers · asked by lestat_louis_armand 1

example plastics - can it be biodegradable?

2007-02-28 20:09:41 · 1 answers · asked by Shaina A 1

Why does the iside of an infrared experiment satelite shoul be extremely cold. what science behind it. please explain

Eg- IRAS which was projectiled in 1983 was that

2007-02-28 19:56:47 · 2 answers · asked by Anonymous

2007-02-28 19:23:34 · 7 answers · asked by kirda 1

i intend doing research on the topic with specific interest on enegy audit in order to finding the overall effy and cost analyses of a power plant. losses are also of interest.

2007-02-28 18:25:02 · 1 answers · asked by rambo suzuski 1

Hi, I was wondering how to bend a 7/8" diameter 1mm wall thickness aluminum pipe about 55º angle without cracking the wall and having no bumps on the bent area. I'm thinking
A.) through hydraulics but it will crumple the pipe
B.) through heat making the metal soft but I think the wall would crack.
C.) Making a jig to manually bend it but I guess the radius wouldn't be perfect.

Any suggestion or fact will be much appreciated.

Thanks.

2007-02-28 18:23:32 · 4 answers · asked by Gary 1

How many tons of coal are contained in one acre of a coal seam that is six feet thick, if the density of the coal is 90 pounds per cubic foot? Show Work Please

2007-02-28 16:32:06 · 3 answers · asked by Tony 86 1

2007-02-28 16:03:48 · 3 answers · asked by DW 1

Engineering Stat Question

Let X be a Poisson random variable with lambda=2 and Y be a Poisson random variable with lambda=4. Both are independent. Determine the following probabilities

P(X<4,Y<4)

P(2<=X<4, Y >=3)

2007-02-28 15:54:02 · 1 answers · asked by The Dude 3

that would benefit from each of the following: Artificial Intelligence, Expert Systems, Virtual Reality

2007-02-28 15:50:41 · 4 answers · asked by cj 1

when studying to become an engineer, how hard is it in university? whats the ratio like with females vs males? or what are the cons of being female in engineering?

2007-02-28 15:45:53 · 7 answers · asked by ram237 1

Enginieering and math question!!!! help!!!?
A commonly used rule of thumb is that the average velocity in a pipe should be about 1 m/s or less for "thin" fluids(viscosity about water). If a pipe needs to deliver 6,000 m^3 of water per day, what diameter is required to sastify the 1 m/s rule?

2007-02-28 15:36:54 · 4 answers · asked by el tuani 1

A commonly used rule of thumb is that the average velocity in a pipe should be about 1 m/s or less for "thin" fluids(viscosity about water). If a pipe needs to deliver 6,000 m^3 of water per day, what diameter is required to sastify the 1 m/s rule?

2007-02-28 15:35:17 · 1 answers · asked by km1988 1

I want to use motor amps from say a 40 hp motor, to estimate the tons per hour of rock being carried by the conveyor. I am wondering if the relationship is linear with respect to motor amps? Any idea? TPH = Factor * motor amps - factor2, what do you think?

2007-02-28 15:29:22 · 3 answers · asked by Anonymous

in the order the components work and what they do

2007-02-28 15:22:49 · 6 answers · asked by rcorey123 1

I need to specefy the radius of a segment or curve in a 2D schematical drawing.

2007-02-28 14:55:07 · 2 answers · asked by Anonymous

"a minge like a ripped out fire place" what exactly does it imply?

2007-02-28 14:52:32 · 10 answers · asked by HERBS 2

2007-02-28 14:49:54 · 11 answers · asked by HERBS 2

2007-02-28 14:41:58 · 2 answers · asked by JAMES 4

For ease of installation, a cabin that is used occasionally is supplied with baseboard electric heating. These are 30 amp circuits powered with 220 volts. To supply 70,000Btu/h (about 20kW), how many circuits are needed? What is the resistance of each baseboard "strip" in a single circuit?

I need help with this problem... I can't figure it out at all.

2007-02-28 14:34:22 · 1 answers · asked by Sir Guitarist 2

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