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A black box with a circuit in it is connected to a

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

Solution for problem 4.86 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 4.86

A black box with a circuit in it is connected to a variable resistor. An ideal ammeter (with zero resistance) and an ideal voltmeter (with infinite resistance) are used to measure current and voltage as shown in Fig. 4.143. The results are shown in the table on the next page. (a) Find i when (b) Determine the maximum power from the box. R() V(V) i(A) 2 3 1.5 8 8 1.0 14 10.5 0.75

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Chapter 10 Notes  Main things that affect temperature on planets: sunlight, reflection (albedo), rotation, and absorption of infrared light.  Majority of gas in the atmosphere is nitrogen.  Greenhouse effect­ has to do with the atmospheric absorption of infrared radiation.  A greenhouse gas is one that effectively bounces around molecules coming from the Earth and keeping the heat from escaping the surface.  Greenhouse gases include: Water (H20) and Carbon dioxide (CO2)  Nitrogen is transparent to infrared making it not a greenhouse gas. Oxygen falls under this category as well.  Our atmosphere is transparent to visible light.  Without the greenhouse effect, the surface temperature on Earth would be below the freezing temperature of water.  Methane (CH4) is another greenhouse gas; much more effective than the others  Global winds blow in distinctive patters: Equatorial­ East to West, Mid­latitudes­ West to East,  The Coriolis Effect­ when you are rotating, from your point of view, things will not appear to be moving in a straight line.  Coriolis Effect deflects north­south winds into east­west winds.  Deflection breaks each of the two large “no rotation” cells into three smaller cells.  Sources of gas: outgassing from volcanoes, evaporation of surface liquid; sublimation of surface ice, and impacts of particles and photons.  Escape velocity from Earth is 11.3 km/s  In a hotter atmosphere there will be a better chance for molecules to break free and escape the atmosphere of the planet, meaning that planet will loose much more of its atmosphere.  The Earth’s escape velocity is lower than the speed of hydrogen gas.  Earth’s atmosphere isn’t mostly hydrogen because hydrogen is a light gas and moves faster than heavier gasses allowing it to escape the Earth’s atmosphere  Characteristics of Venus­ runaway greenhouse effect, sulfuric acid clouds, and almost no surface winds.  Characteristics of Earth­ atmosphere composed of mostly nitrogen and has an ultraviolet absorbing atmosphere.  Characteristics of Mars­ extremely low density atmosphere and global dust storms. • Effects of atmospheres­ They create pressure that determines whether liquid water can exist on surface. They absorb and scatter light. They create wind, weather, and climate. They interact with the solar wind to create a magnetosphere. They can make planetary surfaces warmer through the greenhouse effect.

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Chapter 4, Problem 4.86 is Solved
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Textbook: Fundamentals of Electric Circuits
Edition: 5
Author: Charles Alexander
ISBN: 9780073380575

Since the solution to 4.86 from 4 chapter was answered, more than 246 students have viewed the full step-by-step answer. The answer to “A black box with a circuit in it is connected to a variable resistor. An ideal ammeter (with zero resistance) and an ideal voltmeter (with infinite resistance) are used to measure current and voltage as shown in Fig. 4.143. The results are shown in the table on the next page. (a) Find i when (b) Determine the maximum power from the box. R() V(V) i(A) 2 3 1.5 8 8 1.0 14 10.5 0.75” is broken down into a number of easy to follow steps, and 74 words. The full step-by-step solution to problem: 4.86 from chapter: 4 was answered by , our top Engineering and Tech solution expert on 11/10/17, 05:48PM. This textbook survival guide was created for the textbook: Fundamentals of Electric Circuits, edition: 5. This full solution covers the following key subjects: box, shown, resistance, ideal, next. This expansive textbook survival guide covers 18 chapters, and 1560 solutions. Fundamentals of Electric Circuits was written by and is associated to the ISBN: 9780073380575.

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