Engineering

genetic engineering, chemical engineering, biology

Insulation resistance is temperature-sensitive. When temperature increases, insulation resistance decreases, and vice versa. A common rule of thumb is insulation resistance changes by a factor of two for each 10 DegrC change. So, to compare new readings with previous ones, you'll have to correct your readings to some base temperature. For example, suppose you measured 100 megohms with an insulation temperature of 30 DegrC. A corrected measurement at 20 DegrC would be 200 megohms (100 megohms times two).

in todays life science is every thing

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When designing a transformer you have to calculate the number of primary windings so that the transformer will operate properly/efficiently. There are a few different variables that have to be taken into account.

Ac:

Ac is the effective cross sectional core area. This number should be supplied by the core manufacturer.

B:

Flux density (B) is expressed in gauss. If the flux density is too high the core will saturate (effectively disappear from the magnetic circuit - very bad). Generally, in car audio amplifier switching power supplies operating at or below 35.000hz, the flux density is kept at or below 2000 gauss. Some cores will operate at higher flux density for frequencies below 35,000hz but 2000 gauss is a good conservative number. For higher frequencies, you have to design for lower flux density to prevent excess core heating. For a more precise value for a given core material, refer to the core manufacturer.

Primary Voltage:

The primary voltage for a push-pull system is double the primary input voltage. For car amplifier switching power supplies, the input voltage is 12VDC. This means that the total primary voltage is 24 volts. If we use 13.5 volts as the input voltage, the primary voltage would be 27 volts.

Operating Frequency:

The operating (oscillation) frequency is simply the frequency at which the primary is driven. Generally between 25,000hz and 50,000hz in car audio amplifiers.

Primary Turns:

The number of primary turns returned by the calculator is the total number of turns on the primary side of the transformer. Of course, with a push pull system, the number of turns on each half of the primary must be equal. If the output says that you need 13 turns, you'd round up to 14 turns and each half of the primary would have 7 turns. From the previous diagram, you'd have 7 orange turns and 7 green turns on the core.

Skin Effect:

When wire (specifically, solid copper conductors as are used for transformers) is used to carry DC current, the entire cross sectional area of copper carries the current equally. When wire is used for AC current, the current is carried differently. At low frequencies, the current flow is not significantly affected by the skin effect. As you get into the higher frequencies (as those used to drive a transformer in a switch mode power supply), the current flow is carried disproportionately by the outer area of the copper wire (especially for large single solid conductors). This is called the skin effect. If, for example, you are using 14g wire at 100khz, the wire will not be able to carry the same amount of current as it could if it were passing DC. If your calculations told you that you needed to have ~4120 circular mils, you'd have a few choices. You could use 1 strand of 14g wire, 3 strands of 17g or 6 strands of 20g. All would have the same current carrying capacity if you were using it in a DC circuit but... If you were using it for AC, the 14g would only be suitable for frequencies below ~6000hz. Above that frequency, the voltage losses and power dissipation may be unacceptable (it would still work above 6000hz but not efficiently). The maximum frequency that you'd want to use with the 17g would be about 11,000hz. For 22,000hz the 6 strands of 20g would be a good choice.

It has a giant spring on it, and when you sit on it the spring pulls back small amounts at the time, causing it to swing back and forth.

Msc in biomedical instrumentation : the right choice of instruments required for the design of the medical devices from the wide range of electronics & instrumentation family.

The maintenance & troubleshoot of the equipments preventive & breakdown

biomedical engineering has given an existence to biomedical instrumentation as one of its specialization. Since biomedical engineering is on a wider platform & is at medical to technology interface like human touch

im not telling you

1 HP = 746W, so about 1/3 HP.

to solve problems and advance society

To meet the threat of a competitor's product they need to focus on the price of their product,

brake engineer

It depends on what milling machine you are using. If its the over head type (looks like a drilling machine) or if its the type where an arbour runs horizontal to the machine - line a circular saw.

IN the prior you and incline the the head of the machine to the angle you need and using the correct cutter type cun angle slots end angles etc. If your using the latter machine you would normally set the jig, vice or securing system to the angle you want and use the machine to cut the work piece. There are numourus ways to cut anglles on millers its dependant on the machine you have, cutters available, work piece securing equipment and finally the type of angle required

It means the same as it does elsewhere.

As many as the transmission the customer orders with it has. Could be as few as four or as many as 18.

It is called a gear tooth. There can be many types of teeth based on the gear design; such as spur, helical, straight bevel, spiral bevel, hypoid, and several others.

yes definitely engineering is a best platform to choose has your career for your bright future.

If any person want to show out there innovative ideas it is the better place where you get scope over you thinking.

But now a days engineerings getting out of the campus are not much proffesionals because of the spoon feeding of the management.Most of the engineering students are not bothered about concepts but they are only concerned about their marks.Thats the main drawback of the engineering.

Other than this engineering is a very good platform for your bright future.

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One standard load is the load of a typical input of a specified logic family. This is more relevant with bipolar logic families (e.g. RTL, DTL, TTL, ECL, I2L) than MOS logic families (e.g. NMOS, CMOS). Outputs of devices in these logic families are then rated by the number of standard loads they can drive. However when crossing between logic families (e.g. LS TTL to S TTL) the concept of standard loads is less useful and actual high/low state input current loading and output drive capability calculations should usually be made.

Excavation to correct unsuitable sub-grades and embankment foundations and disposal of the excavated material. This defines the quantity of soil to be removed (organic, muck) and replaced.

The point of doing these assignments is to learn something and show understanding. Not to search on answers.com

ur pig is ur mother

Technical Drawing is an international language;meaning that any drawing can be interpreted by professionals globally, Students desiring professions in the area of engineering, architectural, surveying and manufacturing should learn Technical Drawing. Provides visual guideline as how to construct a product or structure. Students will also learn to create, deaogh and analyze before the completion of their drawing. They are motivated to become criticals thinkers, planners and evaluators of their own work. Technical Drawing encourages, teamwork, communication, use to establishied methods with the field and those applied in problems solving. It boosts the self-esteemof students after they have seen their finish work.

Wheel encoders are devices that allow one to measure the precise speed or distance a wheel travels