Post-Use Review. College Physics, 3rd ed

Serway, Raymond A.; Faughn, Jerry F.; Abbasabadi, Alireza; Lou, Bo

doi:10.1119/1.17396

Cited by 69 publications

(98 citation statements)

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“…The main focus of the instructor's activity during the lectures was working through the assigned homework problems, frequently leaving the final numerical calculations for the students. Although the department had designated College Physics (Serway & Faughn, 1999) as the official text, the instructor chose not to tie the course closely to any particular textbook, and so wrote all of the homework exercises in the style of typical end of chapter problems. The assignments consisted of 10-12 exercises each week, and usually several of the problems were multistep.…”

Section: Methodsmentioning

confidence: 99%

Comparison of student performance using web and paper‐based homework in college‐level physics

2003

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Homework gives students an opportunity to practice important college-level physics skills. A switch to Web-based homework alters the nature of feedback received, potentially changing the pedagogical benefit. Calculus-and algebra-based introductory physics students enrolled in large paired lecture sections at a public university completed homework of standard end-of-the-chapter exercises using either the Web or paper. Comparison of their performances on regular exams, conceptual exams, quizzes, laboratory, and homework showed no significant differences between groups; other measures were found to be strong predictors of performance. This indicates that the change in medium itself has limited effect on student learning. Ways in which Web-based homework could enable exercises with greater pedagogical value are discussed. Web-based homework is a rapidly growing educational use of the Internet. At least a hundred thousand U.S. students currently submit their homework for computerized grading over the Web while attending real (nonvirtual) classes, and the practice is also growing rapidly in math, chemistry, and other sciences.1 In addition to this are students enrolled in on-line courses and those who use on-line practice quizzes and the like. ''Anytime, anywhere'' computerized systems which instantly mark answers right or wrong and then allow errors to be corrected are replacing traditional paper homework handed in during class, graded by the instructor or an assistant, and returned with marks and comments days to weeks later.Homework is an important component of introductory physics instruction at the college level. Introductory algebra-and calculus-based physics courses at the college level put a great emphasis on the ability to solve problems. Specifically, these are word problems requiring students to find a numerical quantity using given information and applying one or more physics formulas. All the widely used textbooks devote significant space to examples of how to solve these types of

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Section: Methodsmentioning

confidence: 99%

Comparison of student performance using web and paper‐based homework in college‐level physics

2003

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“…Fluid velocity in a tube can be measured by Bernoulli's and continuity equations under assumptions that the fluid follows ideal fluid basic equations [9]. To calculate the pressure difference of biogas-air mixture at the inlet and outlet of the venturi, the continuity equation is used [10,11,12] yielding .…”

Section: Formulation Of Output Power Using Venturementioning

confidence: 99%

The Improvement of Carburater Efficiency Using Biogas-based Venturi

Lasmi

Singarimbun

2016

MATEC Web Conf.

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Abstract. The elimination of the fossil fuel subsidy by the Indonesian government has caused an increase in fuel prices, and a solution to find a relatively cheap and environmentally friendly alternative energy is needed. Biogas is one of the sources of renewable energy that has a potential to be developed, especially in farming area where the abundant animal excrement is not yet optimally used and causes environmental problems. Addressing this issue, we have developed an innovation by making a biogas and air mixer instrument through venturi pipe, using the basic theory of fluid mechanism in order to increase the use of biogas as an electricity source. Usually, biogas-based electric generators use dual fuel system such as fossil fuel and biogas to perform combustion due to the low octane contained in the biogas. By replacing the readily available manufactured venturi with the modified venturi, optimal combustion can be reached with using only single fuel of biogas. The results of the experiments show that the biogas debit on carburetor increases from 13 to 439 watts consuming biogas fuel from 0.22 to 4.96 liter/minute, respectively. The amount of combusted biogas depends on the value of the load power. Within the scope of our results, the maximum voltage reached is about 211.13 -211.76 volts which is feasible to use for 220 volts electrical appliances

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“…Subsequently, the time-varying magnetic fields result in an induced electric field inside the tube, a phenomenon which can be described by the Faraday law [10]:…”

Section: Mechanisms Of Electromagnetic Anti-foulingmentioning

confidence: 99%

Investigation on the Electromagnetic Anti‐Fouling Technology for Scale Prevention

Xing

Chen

2005

Chem Eng & Technol

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An electromagnetic anti-fouling (EAF) device was built for treating scale containing water. In order to validate the effect and identify the mechanisms of EAF technology, a series of experiments were carried out, both with and without, an EAF device. The fouling thermal resistance was measured as a function of time. Scanning electron microscope (SEM) images of the fouling layers were obtained and the particle size distribution in solution was analyzed by dynamic light scattering (DLS) technology. The main results were as follows: (1) With EAF treatment, the crystal phase of calcium carbonate was changed to calcite from the aragonite type which exists without EAF treatment; (2) A rapid particle growth was observed under EAF treatment conditions. This rapid growth was due to that the EAF treatment results in an induced electric field inside the bulk flow, and can effectively increase collision frequency of the ions and crystals along with the effectiveness of collision. This implies that the particle growth was promoted mainly by a coagulation process, and not by nucleation growth; (3) The EAF treatment greatly reduced the fouling resistance within the time period tested.

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Post-Use Review. College Physics, 3rd ed

Cited by 69 publications

References 0 publications

Comparison of student performance using web and paper‐based homework in college‐level physics

Comparison of student performance using web and paper‐based homework in college‐level physics

The Improvement of Carburater Efficiency Using Biogas-based Venturi

Investigation on the Electromagnetic Anti‐Fouling Technology for Scale Prevention

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