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A battery has a short-circuit current of 20 A and an

Fundamentals of Electric Circuits | 5th Edition | ISBN: 9780073380575 | Authors: Charles Alexander ISBN: 9780073380575 128

Solution for problem 4.82 Chapter 4

Fundamentals of Electric Circuits | 5th Edition

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Fundamentals of Electric Circuits | 5th Edition | ISBN: 9780073380575 | Authors: Charles Alexander

Fundamentals of Electric Circuits | 5th Edition

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Problem 4.82

A battery has a short-circuit current of 20 A and an open-circuit voltage of 12 V. If the battery is connected to an electric bulb of resistance calculate the power dissipated by the bulb.

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Chapter 13 Echinoderms Kingdom: Animalia Phylum: Echinodermata  Deuterostomes o Anus develops 1st opening in blastopore o Indeterminant development o Radial cleavage  Marine  Symmetry o Pentaradial symmetry ­ in adults o Bilateral symmetry ­ in juveniles  Nervous system o No cephalization  No head or brain  No centralization of nervous system o Possess a nerve ring with nerves radiating out evenly around body  Body o Endoskeleton  Composed of calcium carbonate ossicles  Covered by cuticle o Dermal branchiae (skin gills) ­ thin out­pockets distributed along the epidermis surface that allow gas exchange to occur between the outer sea water and inner coelomic fluid  No respiratory or circulatory systems o Diffusion through coelom  Water vascular system o Uses seawater to generate hydraulic pressure that powers the tube feet for locomotion and for capturing prey Class and Characteristics Representative Animals Crinoidea Stalk present and attached to aboral surface; mouth and anus both ~ 625 species present on oral surface, branched arms with feathery pinnules; Sea lilies, feather madreporite absent stars Ophiuroidea Long, slender arms distinct from central disc; tube feet lack suckers ~ 2,100 species and are not used for locomotion; no ambulacral grooves; Brittle stars madreporite on oral surface Echinoidea Body spherical or disc­shaped and without arms; endoskeleton ~ 950 species plates fused to form test; tube feet with suckers; well­developed, Sea urchins, sand movable spines dollars Asteroidea Broad arms indistinct from central disc; tube feet with suckers ~1,600 species present in ambulacral grooves; anus and madreporite present on Sea Stars aboral surface Holothuroidea Body soft and cylindrical and without arms; spines absent; tube feet ~ 1, 150 species with suckers; mouth surrounded by branching tentacles; madreporite Sea cucumbers internal Sea Stars Kingdom: Animalia Phylum: Echinodermata Class: Asteroidea Genus: Asterias  Feeding o Carnivorous predators  Slow­moving; stalk prey o Mouth → Esophagus → Cardiac stomach → Pyloric stomach → pairs of Digestive glands extend into each arm and connect to pyloric stomach by pyloric ducts → food passes aborally in intestine → branched rectal ceca → undigested waste is eliminated through anus  I.e. Sea star everts its cardiac stomach through mouth and wedges it intp slit of bivalve’s shell; digestive enzymes from digestive glands pour into body, partially digesting it; pulled into pyloric stomach through cardiac stomach where digestion continues; cardiac stomach is pulled back into the coelomic cavity  Body o Undersides of arms are covered with tube feet, bearing suckers used for locomotion and prey capture  Reproduction o Dioecious o No external features to distinguish sexes o Fertilization is external  Males and females must coordinate the timing of reproductive efforts to ensure the fertilization of eggs  Water vascular system o Consists of a series of internal canals that branch from a centralized ring canal → terminate into hundreds of tube feet that line the ambulacral grooves along the oral surfaces of the arms o Water enter through madreporite and kept under pressure by muscular contractions (affects all behaviors) → tube feet connect to ampullae to contain water  Muscles o Small valves on ambulacral are closed = contraction of muscles in ampullae force water into tube foot to elongate o Postural muscles in tube foot = lateral movements o Contractions of the retractor muscles in tube foot = shortening of tube foot and water forced back into the ampulla External Anatomy of Asterias Structure Function Spines Calcareous projection and support Pedicellariae Pincer­like structures believed to kill small organisms that might settle on body surface, thus keeping the epidermis free of parasites and algae Dermal Gas exchange and excretion through simple diffusion branchiae Mouth External opening to cardiac stomach (through a short esophagus) Anus Regulates egestion of undigested food (feces) from the body Madreporite Porous entrance to the water vascular system that serves as both pressure regulator and simple filter Ambulacral Radiate from the mouth to the tip of each arm and house the tube feet grooves Tube feet Locomotion and prey capture Internal Anatomy of Asterias Structure Function Cardiac stomach Can be everted through the mouth to envelope prey; site of initiation of digestion Pyloric stomach Receives secretion of digestive glands for chemical digestion Digestive glands Secrete digestive enzymes for breakdown of food; play a major role in absorption and storage of food materials Rectal ceca Small, branched “trees” that increase the surface area of the intestine for more efficient nutrient absorption Gonads Produce gametes for reproduction Ring canal Portion of water vascular system encircling the mouth Radial canals Portions of water vascular system emanating from the ring canal and leading into each arm of the sea star Stone canal Portion of water vascular system leading from the madreporite to the ring canal Madreporite Porous entrance to the water vascular system that serves as both pressure regulator and simple filter Ampullae Provide hydraulic pressure for movement of the tube feet Ossicles of endoskeleton Support

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Chapter 4, Problem 4.82 is Solved
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Textbook: Fundamentals of Electric Circuits
Edition: 5
Author: Charles Alexander
ISBN: 9780073380575

This full solution covers the following key subjects: Battery, bulb, Circuit, dissipated, connected. This expansive textbook survival guide covers 18 chapters, and 1560 solutions. The answer to “A battery has a short-circuit current of 20 A and an open-circuit voltage of 12 V. If the battery is connected to an electric bulb of resistance calculate the power dissipated by the bulb.” is broken down into a number of easy to follow steps, and 34 words. Since the solution to 4.82 from 4 chapter was answered, more than 266 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 4.82 from chapter: 4 was answered by , our top Engineering and Tech solution expert on 11/10/17, 05:48PM. Fundamentals of Electric Circuits was written by and is associated to the ISBN: 9780073380575. This textbook survival guide was created for the textbook: Fundamentals of Electric Circuits, edition: 5.

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A battery has a short-circuit current of 20 A and an