mode. 4. Describe three (3) methods of speed control in DC machines. 5. A shunt dc motor has P poles and is rotating at speed N rpm. The machine windings are lap wound. There are z armature conductors and a parallel paths. The flux developed is ɸ webers per pole. Derive an expression for the armature voltage developed in terms of ɸ‚ N‚ z‚ p and a. 6. A 30 hp‚ 230 V‚ 1150 rpm shunt motor has four poles‚ four parallel paths and 882 armature conductors. The armature circuit resistance is 0.170 . At
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that each sex chromosomes are attached to spindles from both poles during prophase I; however‚ prior to anaphase I that particular orientation “changes to the syntelic orientation (both sister kinetochores connected to the same pole)‚ perhaps by the release of microtubule attachments from the more distant pole by each of the chromosomes. The syntelic orientation just prior to anaphase I leaves each sex chromosome attached to the nearest pole via kinetochore microtubules‚ ensuring nonrandom segregation”
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When two magnetic fields from two different magnets meet‚ attraction or repulsion will occur between the magnets according to the pole of the magnetic fields. [pic] From the diagram‚ we can see that the magnetic field has a direction. The magnetic force come out from the N pole and goes to the S pole. There are no distinguished lines which separate the N and S pole in a magnet. One part of the magnet will always be N and the other will always be S. When hanged freely in the air‚ a bar magnet
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On Sunday‚ none of the boys was faster than the girl. Danica Patrick became the first woman to win the pole position for the Daytona 500‚ considered the Super Bowl of NASCAR‚ posting a lap of 196.434 mph Sunday. In doing so‚ she also became the first woman to win a pole at any NASCAR top-division race‚ racking up another milestone in her barrier-breaking career. "I’ve heard stories about a kid‚ a boy or a girl‚ saying‚ ’But mommy‚ daddy. That’s a girl that’s out there racing.’ And then they can
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other pole‚ the ring affects its distribution and some of it is attracted to the iron ring. 2. How does changing the current affect the magnetic force on a wire suspended in a magnetic field? As the current rises‚ the magnetic force is pushing the magnet away from the current‚ or pulls the magnet either it is north pole of south pole. The force is increasing as the current increases. 3. What would happen if the magnets in the assembly were not properly arrange‚ meaning the North Pole of one
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Range Poles A range pole‚ which may also be called a lining pole‚ is a pole painted with alternating stripes of different colors in consistent widths used often to site measurements. The tool may be a common one for surveyors‚ where the colors for the stripes are usually red and white or red and yellow. The colors are picked based on their visibility. One end of the pole will typically have either a pointed tip or gripping shoe to aid in standing it on edge. Longer range poles may be equipped
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The Houston Center for Photography has a photo titled Jordan up the pole Rusell Heights by Doug Dubois. The photo was taken in 2010 and printed in 2015. The title of the photograph is depicted exactly as such in the picture. An adolescent male‚ is shown with his legs crossed on the very peak of a telephone‚ with only one hand hold on to the steel pole. It is unsettling at first glance to see a young male so far away from the ground‚ as one may think he is about to fall at any time. The young child’s
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too‚ can be just as great as the fishing experts you see on TV. With the use of a jig pole‚ a variety of jigs‚ and a depth finder/trolling motor/boat combination‚ I will explain how to catch crappie easily and successfully. First‚ you will need a jig pole specifically used to catch crappie. One brand of jig poles that I recommend is B-n-M; it is a jig pole company known to specifically handle crappies. The jig pole will need to be twelve feet in length. This length is ideal because you will not have
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Channelized Left-Turn Lanes with Wide Medians 8 3.2.4 Signal Head Equipment 10 3.3 Pedestrian Signals and Poles 10 3.3.1 Pedestrian Considerations 10 3.3.2 Pedestrian Signal Heads 11 3.3.3 Curb Ramps 11 3.3.4 Pedestrian Refuge Islands 11 3.3.5 Poles 12 3.3.6 Signs 12 3.4 Traffic Signal Poles 14 3.4.1 Pole Placement 14 3.4.2 Strain Poles 14 3.4.3 Timber Poles 14 3.4.4 Joint Use Poles 15 3.5 Span Wire Configurations 15 3.6 Mast Arm Configurations 15 3.7 Cabinet Assemblies 16 3.7.1
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of organic matter. * The upper hemisphere of the egg — the animal pole — is dark. * The lower hemisphere — the vegetal pole — is light. * When deposited in the water and ready for fertilization‚ the haploid egg is at metaphase of meiosis II Fertilization Entrance of the sperm initiates a sequence of events: * Meiosis II is completed. * The cytoplasm of the egg rotates about 30 degrees relative to the poles. * In some amphibians (including Xenopus)‚ this is revealed by the
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