Engineering - November 2007

2007-11-28 07:24:14 · 2 answers · asked by Anonymous

Hi can anyone tell me what AND-OR gates are plz?

thnx in advance

2007-11-28 07:14:08 · 11 answers · asked by Danielle 3

A ball player hits a home run, and the baseball just clears a wall 8.00 m high located 106.7 m from home plate. The ball is hit at an angle of 36.2 degrees to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the ground. What is the initial speed of the ball in m/s?

2007-11-28 07:11:26 · 2 answers · asked by Anonymous

In logic gates, if it is said that AND/OR gates exhibit duality, what exactly do they mean? and how about applying duality to gates? what does that mean plz? thnx so much guyz!!

2007-11-28 07:03:13 · 2 answers · asked by Danielle 3

2007-11-28 06:01:00 · 1 answers · asked by Anonymous

2007-11-28 05:59:24 · 1 answers · asked by Bader A 1

by hydraulic jack i mean the jack for lifting the truck for tyre change. and if it is available with guarantee and how much is the price. i have used many but the require a lot of maintanance. can a hydraulic jack be filled with water. if anyone has technical knowledge please reply me. if it would be small and compact it would be better. should not be like trolly. if available tell me manufactureres or retailers address.

2007-11-28 05:30:09 · 4 answers · asked by yash 1

I won't to avoid mentioning Fourier or Laplace. I would like a simple way of deriving this. Perhaps, i can say something about the energy at higher frequencies being attenuated and relate to Coulombs law and electric feild. Any suggestions?

2007-11-28 05:07:19 · 7 answers · asked by Paine 6

2007-11-28 03:13:51 · 1 answers · asked by Man Man 1

2007-11-28 02:49:47 · 2 answers · asked by Crina I 1

for example a newly concreted foundation slab, when it will be ready to pour the next concreting, columns or beams on top of it?

2007-11-28 00:50:50 · 6 answers · asked by saudma 2

2007-11-28 00:18:27 · 2 answers · asked by Airelle L 1

In a 600-MWel-coal-fired power plant, the following coal shall be used for combustion. C = 76 %, H = 5 %, O = 14 %, S = 3.5 %, N = 1.5 % (waf); w = 11 %, a = 14 %, calorific value: Hu = 23,4 MJ/kg. The efficiency of the power plant is to be assumed as 38 %
a) Calculate the mass flow of dry air for full load for a by 70 % overstochiometric combustion (fluidised bed firing system).
b) Calculate the mass flows of the constituents of the flue gas.
c) The desulphurisation is done with a rather cheap mineral called dolomite (CaMg(CO3)2) which is given to the fluidised bed reactor and spent in large quantities (four times stochiometric quantity). How much dolomite is consumed? How much gypsum is created?

2007-11-27 22:13:06 · 1 answers · asked by Anonymous

In ESP, +ve Terminal is earthed for collecting the dust and -ve terminal is for charging the dust particles. Why +ve terminal only earthed?If -ve terminal is earthed what happens?

2007-11-27 17:58:47 · 1 answers · asked by ram 1

I'm interested in slip-and-fall problems with
polished marble floors.

Safety experts say that polished marble has a
static coefficient of friction ("SCOF" -- the key
measure of slipperiness, a higher level being
better) of between .4 and .5.

But Americans with Disabilities Act ("ADA")
recommendations call for level walkways
with a SCOF of .6 or better.

So how do builders and developers
who use polished marble in public lobbies
manage to ignore or to comply with the ADA
requirements?

If they can't get the SCOF of standard polished
marble above .5, wouldn't they risk legal suits?

Or can builders and developers use some
sort of additive or chemical agent that
preserves the beauty of the polished marble,
but raises the SCOF to a more acceptable
level of .6 or better?

Are there any books or articles on this topic?

Are there any recognized experts?

Or is mastery of these issues solely a matter
of extensive personal experience?

Many thanks for ANY useful advice!

2007-11-27 17:42:18 · 1 answers · asked by Diogenes 1

something small, i need it for science fair and i really need help, so please help me

2007-11-27 17:39:54 · 2 answers · asked by londy s 1

Hello. I am taking an Engineering Introduction class in college, and our project is to build a truss bridge that can sustain a 2000 lb load. The length is 24 in exactly, and the height and width can not be more than 5 inches. Its a two parallel symmetrical level truss bridge. Do you have any advice before my group starts on the project building? Thanks.

2007-11-27 16:21:24 · 2 answers · asked by john316 1

electrical shock .. ?

2007-11-27 15:47:17 · 8 answers · asked by Anonymous

Hi all...i am mixing epoxy ( viscousity 50,000 ) with tiny magnetic particles. I am using hand mixing.For small amount, there is no problem, but for larger amount I am facing some problems. most of the time metal particles are deposited at the bottom of container.It is importent for me to mix both evenly as I have to add controlled amount of magnetic particles. I can not place the shaft-end to be touching as there will be friction between shaft-end and bottom of container.but I place it as near as possible. What I need is to scoop up those deposited at bottom at certain frequency. I dont want to do it manually as the amount is large.Now I am using Anchor stirrer and still facing those kind of problems.Please recommend me some type of shaft which can mix material bottom to top..Thanks...

2007-11-27 15:42:57 · 2 answers · asked by MEDA 1

Electrical Engineering

Computer Software Engineering

Civil Engineering

Im just a kid trying to plan ahead for my future.

2007-11-27 15:35:47 · 11 answers · asked by -=-=- 4

A current of 5 [A] is flowing from left to right through a wire. The actual charges that are
moving inside the wire are electrons. Calculate how many electrons move past a given point
on the wire (moving from right to left), in a time of 60 [s].

How do i solve this problem?

2007-11-27 15:02:19 · 6 answers · asked by Anonymous

2007-11-27 14:50:14 · 6 answers · asked by paras a 1

Ok so my science class is doing this project where we have to find the physical science of things. Like for example what's physical of an electric toothbrush or like the physics of how a scyscraper is built. What im having trouble finding is the physics of an owl flying. Like what's physical about that? The way it flaps it's wings? Please help i need this.

2007-11-27 14:12:34 · 1 answers · asked by Scented Marker 2

two electronics technicians are discussing conductors and insulators. technician A says that conductors have more free electrons than electrons than insulators. technician B says that insulators have lower resistance than conductors. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B is correct
d. neither of the two technicians is correct

2007-11-27 13:59:46 · 2 answers · asked by hannah.anonymous 1

What is a can crusher???
what is a can crusher?why do we use it? does it decrease friction? Is it easier to work with?if it is why????

please give a brief answer.and how do we give more than 20 points for the best answer like if i want to give a 20 points how do you do it?

Thanks alot!!!!

2007-11-27 13:58:27 · 2 answers · asked by Kimberly 2

two electronics technicians are discussing electrical quantities. technician A says that risitance is an opposition to electrical power and voltage is electrical pressure. technician B says that current is the rate of electrical flow in a circuit and voltage is the opposition to current flow. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B are correct.
d. neither of the two technicians is correct

2007-11-27 13:56:12 · 5 answers · asked by hannah.anonymous 1

two electronics technicians are discussing electronic components. technician A says that electronic components are color-coded to indicate their electrical values. technician B says that electronic components are color-coded to indicate their temperature ratings. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B are correct
d. neither of the two technicians is correct

2007-11-27 13:51:50 · 3 answers · asked by hannah.anonymous 1

two electronics technicians are looking at the technical manual for a piece of electronic equipment. the manual refers to a particular resistor as a "2.2 megohm resistor." technician A says that this means that the reisitance value of the resistor is 22,000 ohms. technician B says that this means that the resistor can safely carry a current of 2,200,000 amperes. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and B is correct
d. neither of the two technicians is correct

2007-11-27 13:48:50 · 3 answers · asked by hannah.anonymous 1

what is a can crusher?why do we use it? does it decrease friction? Is it easier to work with?if it is why????

please give a brief answer.and how do we give more than 20 points for the best answer like if i want to give a 20 points how do you do it?

Thanks alot!!!!

2007-11-27 13:40:18 · 2 answers · asked by Kimberly 2

ok here goes i want to buy magnets that has enough power to go through like 1 tick centimeters of plastic, i mean those plastic they use the bulletproof glass out of...any help i Google (ed) it i went to ebay read the types of magnets on wikipedia and i cant find it buy any whwhere and please something small don't wants the neighbors to be suspicious i an indian living in NY they already suspect me lol thanks lots

2007-11-27 12:47:20 · 7 answers · asked by free g 1