OPAC - Pencarian Artikel Jurnal & Majalah Library USD
Menampilkan semua artikel (Halaman 734 dari 34166, Total: 341652 data)
Using iPads for Video Analysis Physics Labs in Times of Social Isolation
klik untuk membaca file PDF
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 370-372 |
| Abstrak | : | For science students doing traditional laboratory experiments, often it may feel as if the apparatus and experiment have been specifically chosen for good results. They suspect that the science they are learning in the classroom will not match nearly as well in the real world. However, many educators have observed that student motivation and learning are improved when students make a connection between the classroom and the real world. Connecting the physics classroom to the real world can be accomplished, even in times of social isolation, with video analysis lab projects using videos taken by students based upon their interests. |
A Long-Range Sunlight-Resistant Photogate
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 367-369 |
| Abstrak | : | Photogates play an important part of many of today’s physics laboratory experiments. They signal when an infrared (IR) beam is interrupted, thus supplying the experimenter with important timing information. Currently photogates use an infrared photodiode (IR transmitter) and a phototransistor (IR receiver). User-built photogates have a weakness though. When a photogate-based experiment is run in a sunlit room, stray sunlight, under certain conditions, can temporarily saturate the phototransistor, causing it to fail unexpectedly. In this article we present an inexpensive IR receiver module that replaces the phototransistor. It is sunlight resistant, comparable in size to a phototransistor, and requires only minor modification to housing, wiring, and programming of the existing user-built systems. This module can also be used in a system designed to communicate data from an ongoing experiment over a long range. The module is commonly used in a handheld TV remote. |
Conductors, Insulators, and Solar Cells: A Simple Introduction
| Pengarang | : | Girolamo Di Francia |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 363-366 |
| Abstrak | : | Young students show great interest in solar energy and a genuine curiosity towards the operating mechanisms of a solar cell. This study reports on a methodology that reveals an effective approach in explaining the operation of solar cells to young students with very limited knowledge in solid-state physics. The methodology can be presented in the form of slides or, in our experience, better by means of a kinesthetic activity involving the whole class. |
Water Leakage from a Rotating Cylindrical Tank
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 360-362 |
| Abstrak | : | Although the old problem of rotating liquid is described and solved in many textbooks and articles, the story still remains interesting. Intuitive understanding of the equipotential spatial surfaces is very difficult. This article is an attempt to present Newton’s rotating tank in the light of the law of conservation of energy. |
Sap Is Clever? Sap Ascent for Undergraduates Investigated with an Artificial Tree
| Pengarang | : | Sergio González Cámara |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 356-359 |
| Abstrak | : | Water is the essential component in living and its role is particularly important in plants. In fact, the crucial photosynthesis process involves a huge loss of sap by transpiration (around 99% from the total amount recovered from the soil through the plant roots) from the stomas on the leaves. Therefore, a question arises: How could trees raise the sap to heights up to 100?m? In this article we present a simple experimental setup that provides a direct visualization and quantification of the water ascent process against gravity. Moreover, the artificial tree offers analogies with “real” ones that will help undergraduate science students from different areas to investigate the influence of environmental and morphological parameters on the variety of physics phenomena underlying the ascension mechanism. |
Designing Laboratories for Online Instruction Using the iOLab Device
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 351-355 |
| Abstrak | : | Scientific laboratories are among the most challenging course components to integrate into online instruction. Available technology restricts the design and nature of experiments, and it can be hard to replicate the collaborative lab environment where frequent and immediate instructor feedback is the norm. Here we report on technological and pedagogical aspects of newly developed labs for online courses using the Interactive Online Lab (iOLab) device. We argue that this technology, coupled with an online course design emphasizing teamwork, targeted feedbacks, and self-regulation skills, provides a robust framework for students to do reliable, engaging, inquiry-based and hands-on labs outside the classroom. After describing the implementation and technology, we explain our lab objectives and how the labs were integrated into two introductory physics courses. We conclude with an example lab on kinematics. |
Beyond the Magnetic Field of a Finite Wire: A Teaching Approach Using the Superposition Principle
| Pengarang | : | Winaryo,Sunarto |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 348-350 |
| Abstrak | : | The traditional lecture-based scheme of teaching physics has shown to be ineffective in several aspects. It results in a lack of motivation, with low impact on students, to address more complex physical systems than the ones presented in textbooks. The electromagnetics course is a clear example at junior and senior university-level education, in particular when the magnetic field concept is introduced. |
Faraday’s Law Low-Cost Experiment Without Permanent Magnets
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 345-347 |
| Abstrak | : | Electromagnetism is a complex topic for students at different educational levels. Perhaps one of the reasons for this is that students are unable to visualize the forces, fields, currents, and other electromagnetism key concepts that are related to the topic. Most teachers address this difficulty by including the use of some technological instruments such as virtual simulations, as well as hands-on experiments. This paper describes a simple experiment related to electromagnetic induction. The central principle of electromagnetic induction is Faraday’s law. Michael Faraday first stated his law in 1832 as “if a terminated wire moves so as to cut a magnetic curve, a power is called into action which tends to urge an electric current through it.” Nowadays, physicists use modern language to describe Faraday’s law of induction: “the induced emf in a closed loop equals the negative of the time rate of change of magnetic flux through the loop”; see Eq. (1) |
What Physics Students Can Learn from the Wright Brothers
| Pengarang | : | Brian R. Page |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 340-344 |
| Abstrak | : | The Wright brothers, Wilbur and Orville, are often depicted as lone geniuses, secretly assembling the first successful powered aircraft far from civilization at Kitty Hawk on the Outer Banks of North Carolina. There is a germ of truth in the popular story, but only a germ. The brothers succeeded while so many other experimenters failed not because they possessed superhuman intelligence, but rather because they approached the problem of powered flight as engineers, using a step-by-step methodology to tackle the many different challenges while at the same time carefully measuring and logging each test case. Still, this wasn’t enough, and the brothers resorted to fundamental research in achieving their final breakthrough. Their approach to success remains a model of scientific research and applied technology, and is applicable today in the physics laboratory. |
Using the Naked Eye to Analyze Polarized Light From a Smartphone Open Access
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 5) |
| Halaman | : | 337-339 |
| Abstrak | : | Optical polarization phenomena are omnipresent in physics, chemistry, biology, and technology. Studying optical polarization is best done through an interdisciplinary approach that combines biology and technology, which usually makes things more interesting to students. Seeing Haidinger’s brush for the first time can be an exciting discovery for many students. Polarization also has profound conceptual relevance to school curricula, and many beautiful polarization experiments can be performed with cheap materials. In this article we present experiments that students can perform with a smartphone as a source of polarized light and the naked eye as their analyzer. |