Industrial Engineering

This is a 3-phase, dual-voltage motor. The 12 leads represent six different windings. For the higher voltage, pairs of windings are connected in series, then the three resulting pairs are connected into a delta configuration to tie to the power source. For the lower voltage, the pairs of windings are instead connected in parallel before combining them into the delta configuration. The windings MUST be combined in the proper order AND in the correct phase for it to work. Mistakes result in great quantities of smoke being released! Each of the leads should have a label, such as T1, T2, T3, etc. It will be either an adhesive label or sometimes printed in ink right on the wire. There is no standard labeling scheme, so each manufacturer always shows the connections for each voltage on the motor nameplate. There is no real way to guess at this, if the nameplate is missing contact the manufacturer for a diagram.

Because oil is in the crust, scientists never drilled to the mantle so far because it is too deep for them.

That really depends on the type of stainless steel and how it is conditioned. For example 300 series steels that are annealed have a yield strength of 30,000 psi and a tensile strength of 80,000 psi. But if cold worked these increase to 65,000 psi and 125,000 psi, respectively, and even higher depending on method. For high strength stainless steels such as A286 or 17-4 PH, tensile strengths over 160,000 psi are realized.

The board is printed with the negative (in the sense of a photographic image) of the design that is desired on the finished board, in a material that is impervious to the solvent that will subsequently be applied to the board. When that solvent is applied the parts of the board that have not received the printed image are etched away leaving the desired circuitry.

The lead screw moves the turret by a precise increment for every rotation of the screw. This allows the machine to generate threads in a workpiece, to generate precise length and diameter dimensions, and to maintain a constant rate of metal removal.

make sure you test them before working on it

its about 300000beer

First of all, since the dam was finished, the soil in egypt is degrading. Today, more than a half of it is rated medium to poor. Second, the construction itself cost 1 billion dollars and the Egyptian government had taken a loan of more than 300 million dollars.

(sorry for my poor English)

A zigzag transformer is used in connection with 3 phase and is made up of 6 coils connected in a "Y" manner. Each leg of the "Y" is made up of a coil on a different phase leg of the transformer. The neutral formed by the zigzag connection is very stable. Therefore, this type of transformer, or in some cases an auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer will carry a fairly large rating, yet physically be relatively small. This particularly applies in connection with grounding applications. The reason for this small size in relation to the nameplate KVA rating is due to the fact that many types of grounding auto transformers are rated for 2 seconds. This is based on the time to operate an overcurrent protection device such as a breaker. Zigzag transformers used to be employed to enable size reductions in drive motor systems due to the stable wave form they present. Other means are now more common, such as 6 phase star.

ANWER the main purpose is to control the annual floods and to produce electricity

The cosine of phase difference between the voltage and current...........

Power factor is actually the ratio of the electrical 'true power' that does work in the real world - the 'watts' of power that are converted to mechanical motion, heat etc - compared to the 'apparent power' volt-amps that the meters on the panel seem to show the load as using.

Circuits containing inductors or capacitors draw energy from the supply mains to 'charge' (ie, store energy in their magnetic or electrostatic fields) while the voltage of the sinewave is changing but they return this energy to the supply 90 degrees later. This means they are drawing a current (drawing volt-amps), but not doing useful work with that current, so they're not consuming any true power (watts). An effect of inductors and capacitors is that they move the current waveform out of phase with the voltage waveform. The higher the proportion of stored energy to useful work, the greater the angle between voltage and current.

Pure resistors don't store any energy, so all the volt-amps they draw get used as watts in the load. There's no phase shift between voltage and current, so they're 'in phase'. All the volt-amps are used as watts, so true power equals apparent power, and the ratio of true power to apparent power is 1.0 in a resistor. It has a 'power factor' of 1.0, or 'unity'.

Circuits with inductors (or capacitors), though, draw volt-amps, some of which do useful work (eg, an inductive motor drives a load and heats the cooling air) and some of which is returned to the mains (from the stored magnetic field in the motor windings collapsing). Because some of the volt-amps are returned to the mains, there's less true power than volt-amps - so the power factor is less than 1.0 F'rinstance, a 220 volt motor draws 10 amps at full load, but delivers 2000 watts of power at the same time. It has a power factor of (true power) / (apparent power) = 2000 / (220 x 10) = 0.91

That means 91% of the 'apparent power' - volt-amps - is actually doing useful work - true power. Some places give power factor as a decimal fraction - 0.91 - while others give it as a percentage - 91%. In all cases, though, the angle between the voltage and the current - the 'phase angle' - can be found by finding the angle that has a cosine equal to the power factor. eg, the phase angle in the above example is (cos-1(0.91) or about 24.5 degrees lagging. That's what the answer at the top of this question is saying.

A conveyor belt is most often powered by a motor.

Some of the heat is used to produce electricity, the rest is waste and put into the environment.

Much of the energy of the heat is lost as the steam passes through the turbines, with the heat being converted to mechanical energy, and then to electrical. This accounts for about 35% to 40% of the energy of the heat, cooling it by the removal of that heat.

It would be possible for residual heat to be tapped for conversion into electricity, also, but this is not done in most nuclear reactors. Converting it to electricity would get another 10% or so of the heat of the remaining steam, cooling the steam further.

The remainder of the heat is waste. It is dumped into the environment, primarily into the air, by using heat exchangers and cooling towers. In this system, the steam is used to heat water, condensing in the process. The water is then used to heat air in the cooling tower.

Another way to get rid of waste heat is to use heat exchangers to heat a nearby body of water, such as a lake, the ocean, or a river. This is usually done only in the summer, when the atmosphere is warm and the cooling towers are not efficient enough to do their work.

25 amps

Mild steel, not copper.

To know the force, you need to know how much you want to bend it; you also need to know the dimensions of the plate and how it is supported.

The primary benefit of the Aswan High Dam was electricity generation, which allowed Egypt to be a modern country. Secondary benefits included preventing the yearly floods of the Nile and keeping a reserve of freshwater, should Egypt have a drought.

An electric iron consist of basically a heating coil and heat control circuit viz thermostat. Thermostat act as a switch. When we switch on the electric iron current flows throught the heating coil. The heat in the heating coil causes expansion in the thermostat which gradually disconnects the supply. [ see the working of thermostat].

In simple terms: think about the amount of physical trauma caused by getting hit by a car going 60 miles per hour. Now take the velocity of a car, and make it a LOT bigger. Now take the impact area and make it about several thousand times smaller.

That's an a greater amount of kinetic energy than a speeding car, impacting on a much small area. It shouldn't be hard to figure out why the physical damage of a bullet, if well placed, can easily kill someone.

and an even more simple term: bullets make holes. The person dies either because they bleed to death or because the bullet damages something vital like the heart, or a combination of both.

Here are some examples of iron; pig iron, cast iron, wrought iron, ingot iron, enamelling iron, gray iron, white iron chilled iron, malleable iron, ductile iron, compacted graphite iron, alloy iron, abrasion-resistant iron, corrosion-resistant iron heat-resistant iron

Steel is a relatively cheap metal to sell and you would need a lot of it to get a large profit. The price of steel varies depending on the current market. Contacting a local scrap yard would be the best way to know the current rate.

It is the term used by fundamentalist Christian protestants for the religious belief that the creation story in Genesis in the Bible is literal truth. They like to refer to this as a "scientific" theory, but since they can make no verifiable claims about the world from the theory, it is not.

What these people do not realize is that the Bible is an allegory, and its stories teach ways to be a better person. One can have faith and not also believe that the universe was created in a literal 6 days.

I guess it's the strongest form of structure to form the end of the upright cylinder which is the basic reactor enclosure. The reactor must be enclosed with a structure which can contain the worst type of reactor failure which would release a lot of steam. It also protects the reactor and its equipment from the weather.