Engineering - September 2007

ok so who was Hernan Cortez and what did he do for the modern world. oh and was he an explorer or exploiter ? please anser back

2007-09-25 05:21:25 · 4 answers · asked by Doug H 1

Can anyone explain to me about Bernoulli Principle?

2007-09-25 04:36:25 · 6 answers · asked by yie 1

Just to clarify a prior question, I had; I've heard that ionized air can be potentially harmful (i.e. free radicals) so I want to avoid air cleaners that ionize air. The 3M Filtrete electrostatic polyolefin-based filters (very common in furnace filters, and now as part of a standalone air purifier) are pre-charged with a static charge to attract dirt, dust, and particles of inflowing air.

My question is, as non-ionized (regular) air travels through the filter (via a simple fan, there is no ionizer involved) is there any way that it could pick up any of the charge on the electrostatic filter, or that the air can become somewhat ionized in any way or form after it leaves the filter? Now, AFAIK, air doesn't conduct charges well, so my guess would be no, but I'd like to have an expert opinion.

2007-09-25 03:51:36 · 3 answers · asked by Joe Jevers 1

2007-09-25 03:43:24 · 3 answers · asked by coolbunty_87 1

What kind of microcontroller should I use for a VERY simple 2 wheeled, move-forward, move-backward, turn-around, piece-of-crap robot? It's my first robot, but I know quite a bit about robots, just nothing about the difference between microcontrollers and what I'm looking for in one.

2007-09-25 03:26:24 · 5 answers · asked by Rogue Engineer 1

I have a hair straightner which works very well with my hair. I live in India. I know that in USA there is different frequency. So will I able to use my straightner in USA with an adaptor? What should I do for this? Anybody knows how this adaptor will work or not or any details helping me??

2007-09-25 03:24:18 · 3 answers · asked by Anonymous

I fully know and understand how the Ammonia / Water absorption process works.

I even understand how the Ammonia / Calcium Chloride absorption process works.

But in their case, Ammonia is the refrigerant. It has a boiling point of -33 Degrees Celsius. It's understandable that when it evaporates, it takes away heat.

But in the water / lithium-bromide process, water is the refrigerant. I understand that the pressure is lowered to allow the water to evaporate, but how cold can it get? Will it bring down the temperature of the surrounding area to freezing?

Also, if pressure is brought down, what kind of piping is used? Doesn't it have to be strong to withstand the pressure being much higher on the outside than the inside?

2007-09-25 03:07:51 · 3 answers · asked by Abdallah A 3

I am trying to understand why a home made system of inexpensive parabolic mirrors linked into a smaller series of solar panels for home use is not available. I understand solar tracking issues but believe this could be overcome.

2007-09-25 02:55:19 · 4 answers · asked by joshuaelliot1970 1

What website can i find detailed reports on solar electricity and its materials ,price,parts, availability?

2007-09-25 02:44:38 · 4 answers · asked by Mark Ju 1

A.Conduction
B.Adduction
C.Radiation
D.Convection

2007-09-25 02:35:54 · 5 answers · asked by Anonymous

can sumone please sent me drawing 1 previous question papers....South African syllubus.

2007-09-25 01:59:53 · 3 answers · asked by keke m 1

ok so i am doing a project in school and i need to know the best way to keep a large grade A egg safe from an inpact of 7 feet , so basically what is the strongest point of an egg

2007-09-25 01:50:41 · 7 answers · asked by Doug H 1

The fuse blew in my amplifier. I replaced it but the new fuse blew as soon as I turned the power on. Does anyone know what else I should check or what might be the cause of the problem?

The amp is a Marrantz pm32 integrated stereo amplifier. I used the correct rating on the fuse I replaced (250V 1.0A). I can't find a service manual for this amp online.

2007-09-25 01:36:18 · 4 answers · asked by samthesuperfurryanimal 3

2007-09-25 00:54:04 · 6 answers · asked by James Seol 1

in terms of lux and what will be the approximate Lux for doing general office work

2007-09-25 00:14:36 · 1 answers · asked by servant 2

This is for my high school assignment. If you're an engineer, please answer.
What is your name, age, and occupation?

My school assignment is to make a fire prevention device that helps prevent house fire. What capabilities do you think this device should have?

Do you have any suggestions on preventing or stopping a house fire?

Do you have any suggestion on making this device?

Last question. In your opinion, what is the most important attribute of teamwork?

2007-09-24 23:42:59 · 2 answers · asked by minhnhatx 2

Iron balls are used in ball-bearings, bycycles and many more applications in different sizes. How the balls are manufactured on a large scale that too exactly in a sperical shape?

2007-09-24 22:37:41 · 2 answers · asked by ashramam 3

its a plumbing question

2007-09-24 21:11:42 · 4 answers · asked by Anonymous

2007-09-24 20:40:25 · 4 answers · asked by manasa n 1

hey guys...
it's me again....

we have a engineering statics problem....particularly a wrench problem....

what would i do if the given data has the Force F having x, y and z components and the Moment M having x, y and z components?

please help me with my problem....

for sure, you are of BIG help to my problem...

have a nice day to everyone!!!!

jason!!!!

2007-09-24 17:59:32 · 1 answers · asked by nosaj_amazin 1

2007-09-24 17:24:30 · 1 answers · asked by edward j 1

I have a rod attached to a plate and I am rotating the rod through 180 degrees. The rod is 6 inches long, attaches to a plate of 2X2 inches. The material is solid copper on both. Rod diameter is 1". The plate is fixed to a concrete slab and it will not move but I need to determine the shear force to tear away the pipe

2007-09-24 16:19:23 · 2 answers · asked by J B 1

In a Diesel engine LPG is added to boost performance. Could Hydrogen go the same, without expensive equipment? A Hybrid with lead acid batteries would produce more Hydrogen, maybe enough to make a difference.

2007-09-24 14:02:16 · 4 answers · asked by Phil R 1

In a Diesel engine LPG is added to boost proformance. Could Hydrogen go the same, without expensive equipment? A Hybrid with lead acid batteries would produce more Hydrogen, maybe enough to make a difference.

2007-09-24 13:59:11 · 1 answers · asked by Phil R 1

2007-09-24 13:27:45 · 5 answers · asked by Anonymous

Last year I choose it as my major. I am only on the Second Precalculus course, I will start calculus next quarter. There is so much classes to take ahead of me. Please let me know if it is worth the struggle. And how do you like your major? Do you regret that you took this major? Also did you switch your major from engineering?

2007-09-24 12:54:52 · 5 answers · asked by Anonymous

If I have a single phase 200 Amp panel with phase "A" loaded at 24 amps and phase "B" loaded at 14 amps, would that make my total load at 120 Volts 36 amps? and then to convert that to 240 volts would I simply take the VA of 4320 VA @ 120V and divide by 240? That seems way too low. The problem is that all I have are the reading from the two legs of this panel, A & B... I need to know what the total load is with these two readings. These are radio panels so everything being powered is continuous, 80% rule mind you.


Thanks

2007-09-24 12:41:39 · 3 answers · asked by alex_blanding2001 1

a. multi-network
b. Norton
c. Thevenin
d. superposition

Can you also explain why plz thx.

2007-09-24 11:54:19 · 2 answers · asked by Arabian 1

I am interested in finding out more about all thedifferent types of engineers.. Please help.. I need all the info I can get..

2007-09-24 11:48:21 · 5 answers · asked by Laura 1

choices are

a. non-loading
b. large
c. small
d. of low voltage drop

2007-09-24 11:42:17 · 3 answers · asked by Arabian 1