Engineering - October 2007

The holes made will be used for cooling and venting.

2007-10-06 19:14:26 · 3 answers · asked by H@rry D 1

I am just wondering if there are any portable microwaves that you can use on the go. I really wish they are but I have yet to find one. If there are none out there, what limits the reduction of the microwave?

2007-10-06 18:39:42 · 2 answers · asked by pwrfid 2

I can't seem to understand it. For example V2O5 + HCl ---> VOCl3 + H2O
....what the hell is that suppose to mean, I don't get how I can solve it.
I'd be really if someone would kindly explain it to me and provide examples.
thanks

2007-10-06 16:26:21 · 4 answers · asked by Memories of Another World. 6

What are semiconductors basically?
Difference btw semiconductors and conductors?
Diff btw semiconductors and insulators?

In what sense, are they called "semi"-conductors?

I want to intuitively understand semiconductors..

Thanks

2007-10-06 16:21:18 · 6 answers · asked by learner 1

The diagram to the right shows the region enclosed by the curve y = x^2, the lines x =1 and x = 5 and the x axis.

Find the approximation for this area using mid ordinate with:
1 strip
2 strips
and 4 strips.

Now i've done that, and with each of the strips I came up with the same answer 12.5 So that part is down, but it's the next part I'm a little confused about.

~Which do you think is the best approximation?
Why?

Would it be the first one because it requires less calculations for the same answer or the last one because it is more specific?
Or are the all the same?

2007-10-06 15:51:08 · 1 answers · asked by Skaggy says: 5

If you are using a film densitometer with a step size of 7um, what is the minium magnification that you could use so that 20 Å information is transferred within the Shannon-Nyquist information limit of the digitized micrograph? What magnification would you use if you want your sampling to be 3 x the critical sampling frequency?

I know that the Nyquist limit is : the sampling frequency must be greater than TWICE the highest frequency of the input signal in order to be able to reconstruct the original perfectly from the sampled version.

so I think I need to do some on the 20Å information, maybe times 2 or divided it by 2. Can anyone help me?

2007-10-06 15:16:51 · 1 answers · asked by shinjicamui 1

The problem is with separating the wavelengths to each detector from a single lens. Is there a coating I could use to reflect one of the wavlengths while the other passes through? Would it be best to split the beam first then use filters before each detector to single out the IR/visible?
My goal is to image both a visible AND thermal scene with one objective. I can handle everything from the detector to the display but I need a bit of help with the optics. Of course I'm looking for the simplist and cheapest method (IR and cheap don't really go together), but any REAL solutions would be great. Thanks

2007-10-06 11:14:40 · 3 answers · asked by Jeffy 1

Can scientist create a satellite technology to guide a golf ball to its target? Is my idea too imaginative?

2007-10-06 10:37:40 · 7 answers · asked by M m 1

As science and technology leads us to new products, the electronic and software at an incredible rate, it would seem that the damage caused by fallen industries (because some product just was not the best at that time).....would create alot more turmoil, and loss of jobs/stock market investment. Can anyone give an example of how these R & D in all these companies complement each other, or create new directions instead of destroying them by competition?

2007-10-06 10:04:57 · 6 answers · asked by Anonymous

just wondering.

2007-10-06 09:45:25 · 11 answers · asked by hillary. 3

It takes my gas furnace about two hours to get the house up to the setpoint of 72F when it's been off for a long period of time. How much will it cost to run a 2kW electric heater along with the gas furnace.

2007-10-06 09:26:12 · 5 answers · asked by Anonymous

I am a senior in college and will graduate with a degree in Economics. I have come to realize that engineering is my true calling and would like to pursue a career in that field. I was wondering if instead of going back and starting undergraduate in engineering, is it possible for me to get a masters in engineering even though I did not graduate in engineering? would i just have to fulfill some pre-req such as calc 1-4, physics 1-4? or is this entirely not possible?

2007-10-06 09:01:23 · 8 answers · asked by th1a90 3

An airplane accelerates down a runway at 3.20m/s2 for 32.8s until its finally lifts off the ground. Determine the distance traveled before take off?


Im so lost at school atm can someone solve it by showing the work so i can review it and understand it....Greatly Appreciated thanks

2007-10-06 07:20:28 · 2 answers · asked by Anonymous

2007-10-06 05:46:55 · 10 answers · asked by jean_has_cats 2

2007-10-06 03:09:56 · 3 answers · asked by JAMES 4

2007-10-06 01:01:25 · 13 answers · asked by PAUL D 2

Is the type of steel used for katana swords made by the sword makers? or is it commercially bought?

2007-10-05 22:36:21 · 5 answers · asked by Anonymous

2007-10-05 22:33:31 · 6 answers · asked by u&me 2

5 & 5/8 in.
11 in.
8 in.

Which of the following bending angles would you probably make if the handle of your bender ends up in a vertical position?

90 degrees
60 degrees
30 degrees

2007-10-05 20:59:11 · 1 answers · asked by janvincent21 1

2007-10-05 19:05:11 · 4 answers · asked by amrali009 1

What happens when you post something on Answer? Will it stay there forever because you won't be allowed to delete it? If you change your mind later on, can you delete what you post and how?

2007-10-05 18:43:15 · 4 answers · asked by M m 1

I graduated from college 2 years ago, and my degree has proven mostly useless.

I'm 25, and would like to somehow work for a power company maintaining wind turbines. I like the green renewable aspect of it all. Any ideas on how to get a job in the industry?

2007-10-05 18:22:04 · 2 answers · asked by Matt 6

2007-10-05 17:45:41 · 4 answers · asked by deepak_8584 1

2007-10-05 15:41:54 · 6 answers · asked by JD93 1

I want to buy rock by the cubic yard instead of by the ton and would like to know how many pounds is in a cubic yard

2007-10-05 13:40:09 · 3 answers · asked by outlaw1 1

I like doing math problems, I find physics interesting though I am better at numbers, I like to write code, I don't like to work with hardware. I am not a computer expert. I would like to teach someday.

To be honest, I don't know what the "right" major for me is, but based on all the information I have given you, What major combines all those things? Thanks for helping me decide!

2007-10-05 11:59:48 · 7 answers · asked by superman 4

2007-10-05 11:06:31 · 5 answers · asked by Anonymous

I am trying to decide which microswitches I can use on my electronic circuit and have noticed a value in the component catalogs for 'maximum current' how do I work out if ttey are compatable with my circuit. For example if I want to use a relay with a maximum current of 2A how do I work out if this fits within the current rating of my circuit -- I assume I need to work out the current/ampage of the circuit?? Thanks in advance

2007-10-05 09:12:10 · 8 answers · asked by fnordcorps 1

The explosion of the Hindenberg was a quirk... it happened because at that point in the pre-war, the US cut off the supply of helium to the rest of the world. The germans switched hydrogen... this led to inevitable disaster.

However, the dirigible technology was very promising; the ability to move large loads of freight and passengers over land and sea, without need for roads, bridges and other terrain infrastructure, was a great idea; brilliant actually.

Trucks and trains require extensive infrastructural upkeep... and a look around at that infrastructure shows it has been impossible to sustain. Also the roads and rails chew up the landscape.

Modern engineering could make dirigibles of great load bearing effectiveness, that would use far less fuel than trucks
and not require the massive upkeep of railroads...
It's a real answer to a lot of our problems.

Why not look that way again? It would be a greener solution than the contining expansion of highways and rail.

2007-10-05 08:26:11 · 8 answers · asked by Anonymous

Is there a relationship between pressure and temperature(direct or inverse) of a canned liquid at its freezing point or even after(given that it is exposed only to ambient conditions after freezing). Would there be any equation (or approximation) like the gas law pv=rt for a canned liquid relating pressure and temperature

2007-10-05 08:23:51 · 5 answers · asked by pavan s 1