Engineering

Frederick M Bowers invented the first Welding Helmet on April 13, 1915. But I'm not sure where he lived or where the invention took place!! Please improve this answer if you do hear anything!! Ali x Maybe the question isn't about welding helmets but welding. If so, welding was first performed during the Bronze Age. Melting and casting metals (Copper, Brass, etc) and when 2 or more castings needed to be joined they were placed close together and molten Copper, Brass, Bronze was poured so that the puddle would melt the edges producing a "weld" joint. The term Welding means to melt the base material whether it is metal, glass, plastic or some other material.

Enthalpy is the energy of the molecules. It cannot be measured, although CHANGE in enthalpy of reactions can be measured. It's simply heat energy. Exothermic reactions have anegative enthalpy change(which means energy of the products is lower than that of the reactants). Endothermic reactions have a positive value(energy of products is higher than that of the reactants). Entropy, on the other hand, is the degree of disorder. It's the measurement of how disordered a substance is. For example, particles in a solid are regularly arranged, so they are less disordered, and have a low value of entropy. Gases have much higher entropies. Entropy of an individual compound can be measured/calculated.

clearly define th problem they are trying to solve

Learning Electrical Engineering by yourself is much better than going to school, because you can choose the books and style of learning that you want. The most difficult part is finding out what works for you. I taught myself electrical engineering and now work in a firm as an electrical designer, and I am now on my way to getting my PE License. For me the most difficult part was teaching myself the mathematics and physics. It took me a long time to find the right way to learn these subjects on my own, but once I figured it out, I flew through the learning process, and was able to get my first job. I used these 2 books: Engineering Mathematics, and Advanced Engineering Mathematics by K.A. Stroud. These books teach you all the mathematics and physics that you could ever need, and they use a programmed approach to teaching that make it somehow painless to learn even the most complex subjects.

Now you have to learn how to apply your new found mathematical skills, which really you can do anything with, but since you want to go into Electrical Engineering I advise that you get the most basic easy to understand book about electricity ever written, Basic Electricity by Van Valkenburgh. After you have a good grasp of this book you should be ready to decide what specific area of electrical engineering you want to go into. Electrical Engineering is a very large field, but as long as you have a grasp on the mathematics and physics involved you should be able to go into any area you want. There are two major categories to choose from, Electronics or Electrical Engineering. Electronics is concerned with small circuits often found in modern technology. Electrical engineering is concerned with much bigger things like power supply, and distribution, and electrical infrastructure.

The next thing you need to do is start applying for internships or any kind of job at an engineering firm. If you can prove that you know the mathematics and have a grasp on electricity, you should be able to get your foot in the door some how. Once you are in you have to work under a licensed PE for 3 years, and then you will be eligible to take the Fundamentals of Engineering exam, which you should be able to pass as long as you have kept learning for those 3 years. Then a few years later, forgot exactly how many more, you will be eligible for the PE exam. Once you pass this exam you will be a Licensed professional engineer.

Seems like a long road, but even if you go to school, you still have to take the FE exam, and the PE exam. Becoming an engineer in general takes a long time, and takes a lot of passion. I got there this way, and would recommend it over school, because you start getting professional experience sooner, and you avoid a lot of useless classes and fees.

A good way to gauge your progress is to look up the FE exam requirements and see what you need to know.

One example might be in a warehouse where the robots follow 'tracks' to and from the shelves they stock and retrieve from.

wood that was engineered from wood waste

The entry level pay for NASA engineers is from $33,151 to $44,034 plus locality pay. The starting pay for various technicians such as aircraft technicians is from $25,501 to $37,744 plus locality pay.

There were (and continue to be) both positive and negative effects of the Snowy Mountains Hydroelectric Scheme for Australians.

During its construction, many people were displaced from their homes and, while they were offered new homes, these could not replace the memories or the fact that their families had lived in those homes for generations. The original town of Adaminaby was completely dismantled and moved to higher ground to make way for Lake Eucumbene, which would feed the Scheme. Many people lost their livelihood as well: stock (cattle, horses, etc) was no longer permitted to be grazed in the High Country.

Safety was an issue. The workers were under pressure to complete the Scheme in the quickest possible time, so were "encouraged" to work longer hours, and offered bonuses for doing so. This meant that sometimes dangerous shortcuts were taken. Over the time of the Scheme's construction, there were 121 deaths on the worksites: 35 of these occurred during tunnel construction, while the rest were on the roads in and around the sites.

However, during its construction the scheme was a valuable source of employment, for tens of thousands of Australians and post-war immigrants who fled their war-torn countries. The Scheme offered these people the chance to rebuild their lives in a new country, with opportunities they would not have otherwise had. As one of the wonders of the engineering world, the Scheme involves sixteen dams, seven power stations, a pumping station and over 225 km of tunnels, pipelines and aqueducts, so both skilled workers and labourers were attracted to the scheme.

The Snowy Mountains Scheme has many advantages still now. It generates electricity and redistributes water to the Murray River, where it is used for farming and irrigation. The total electricity capability is up to about 3700 MW, which works out to roughly 10% of the needs of New South Wales, though this depends on having enough rainfall and melting snow.

the story I've been told is that when the search and rescue teams find the black box, its covered in black ashes, etc. Really there orange or an other bright color (except for training ones, there usually black so its harder to find them)

It depends on the country you're in (what codes apply), local utility standards, land being crossed (is it hilly?), type of structure/configuration of wires, and the distance between towers. At its' lowest point, the conductor could hang ~25 feet off the ground.

As an ecologist, you get to learn intellectual things about nature.

you could even a run a campaign to tell people about your findings in the field and teach them about how to make the world a greener place.

POSITIVE and NEGATIVE are Direct Current (DC) terms In Alternating Current (AC) terms it is: HOT-LEG (brass colored screw) and NEUTRAL (silver colored screw) On polarized plugs 120volts, the larger prong is the neutral

As much as it costs

question is not clear. RMS is .707 of peak. If you're asking about sums of currents or voltages represented by sine waves and they don't have the same frequency then the sum's RMS value is the square root of the sum of the squared amplitudes of the two waves. The squared amplitudes are proportional to the power in each current or voltage and the result represents the sum of the powers.

If the two sine waves have the same frequency then the sum's RMS value is the sum of the two RMS values. The physical circuit has to add power to the signal. (if the amplitudes are equal the resultant will have 4 times the power)

A Boeing 777 airliner can carry between 31,000 and 48,000 gallons of fuel. This provides a range of between 6,000 and 11,000 miles.

no/yes

A java engineer is one career that begins with a letter J. Junior level engineer is another one that starts with this letter.
Java Engineer

bricks from black cotton soil

Sun is a star not a chemical compound; any chemical equation for Sun.

Sun contain hydrogen, helium and other minor elements.

It is between a whisper and a normal conversation.Threshold of hearing0Don't hear anythingBroadcast studio interior or rustling leaves101/32nd as loud as conversationQuiet house interior or rural nighttime201/16th as loudQuiet office interior or watch ticking301/8th as loudQuiet rural area or small theater401/4th as loudQuiet suburban area or dishwasher in next room501/2 as loudOffice interior or ordinary conversation60Ordinary ConversationVacuum cleaner at 10 ft.70Twice as loudPassing car at 10 ft. or garbage disposal at 3 ft804 times as loudPassing bus or truck at 10 ft. or food blender at 3 ft.908 times as loudPassing subway train at 10 ft. or gas lawn mower at 3 ft.10016 times as loudNight club with band playing11032 times as loudThreshold of pain12064 times as loud as conversation (twice as loud as night club)

It is an empty space- A space where there is no matter. A perfect vacuum has no gas.

Assuming that your voltage is 120 volts the maximum wattage on that circuit is W = A x V = 15 x 120 = 1800 watts. Code only allows circuits to be loaded up to 80% capacity. 1800 x .8 = 1440. 1440/25 = 57 lamps.

Assuming that your voltage is 240 volts the maximum wattage on that circuit is W = A x V = 15 x 240 = 3600 watts. If the question is from a 240 volt country you will have to find out what the local electrical regulations are for circuit loading.

Red-black trees are typically used in real-time applications, where worst-case guarantees are vital. Red-black trees often form the basis of other tree structures, including AVL trees and LLRB trees. Computational geometry, scheduling and language dictionaries are other possible applications for RB-based trees. They are also used in functional programming as a persistent data structure.

because the electrons are trying to stay as far away from each other as possible (like repels like)

imagine a ball with strips of paper attached to it. if the papers lay flat or angle any way but a 90 degree, they with touch the ones in front or behind. the only way to be away from each other is to be at right angles along the ball.

server side:

#include<sys/types.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#define SIZE 4

main()

{

int std, lfd, len, i, j, status, sport;

char str[20], frame[20], temp[20], ack[20];

struct sockaddr_in saddr, caddr;

printf("Enter the port address");

scanf("%d", &sport);

std = socket(AF_INET, SOCK_STREAM, 0);

if(std<0)

perror("Error");

bzero(&saddr, sizeof(saddr));

saddr.sin_family = AF_INET;

saddr.sin_addr.s_addr = htonl(INADDR_ANY);

saddr.sin_port = htons(sport);

lfd = bind(std, (struct sockaddr *)&saddr, sizeof(saddr));

if(lfd)

perror("Bind Error");

listen(std, 5);

len = sizeof(&caddr);

lfd = accept(std, (struct sockaddr *)&caddr, &len);

printf("Enter the text:");

scanf("%s", str);i = 0;

while(i<strlen(str))

{

memset(frame, 0, 20);

strncpy(frame, str+i, SIZE);

printf("\nTransmitting frames:");

len = strlen(frame);

for(j=0; j<len; j++)

{

printf("%d", i+j);

sprintf(temp, "%d", i+j);

strcat(frame, temp);

}

write(lfd, frame, sizeof(frame));

read(lfd, ack, 20);

sscanf(ack, "%d", &status);

if(status 0)write(std, "-1", sizeof("-1"));

else{printf("Enter the sequence no of the frame where error has occured");

scanf("%s", err);

write(std, err, sizeof(err));

read(std, str, 20);

printf("Received the transmitted frame: %s\n", str);

}

}

close(std);

}