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PENGARUH LINGKUNGAN INTERNASIONAL TERHADAP MASALAH PEMBANGUNAN DI DALAM NEGERI
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| Pengarang | : | O. Sutomo Roesnadi |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VII-7, JULI (No. 7) |
| Halaman | : | 556-569 |
| Abstrak | : | - |
WIRASWASTA (ENTREPRENEUR) DAN PERUSAHAAN-PERUSAHAAN PERTUMBUHAN DAN PEMBANGUNAN SEBAGAI FAKTOR PERTUMBUHAN EKONOMI NASIONAL
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VII-7, JULI (No. 7) |
| Halaman | : | 527-555 |
| Abstrak | : | - |
TEMPAT-TEMPAT ILMU SOSIAL DAN KEMANUSIAAN DALAM PENGEMBANGAN SISTEM ILMU DAN TEKNOLOGI NASIONAL-SUATU PEMIKIRAN
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VII-7, JULI (No. 7) |
| Halaman | : | 506-526 |
| Abstrak | : | - |
PANCASILA MORAL BANGSA INDONESIA-ARTI MATERIILNYA
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VII-7, JULI (No. 7) |
| Halaman | : | 493-505 |
| Abstrak | : | - |
Thinking Hard About Physics Before Calculating: An Example from Pendulum Physics
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 7) |
| Halaman | : | 551–553 |
| Abstrak | : | This paper aims to show how to guide students with a familiar example to extract as much physics as possible before jumping into mathematical calculation. The period for a physical pendulum made from a uniform rod is changed by attaching a piece of putty to it. The period for the combined system depends on the location of the putty. Simple reasoning without calculation shows that there are two locations for the putty that do not change the period of the physical pendulum: the axis of rotation and the center of percussion. Moreover, without calculation, we reason that there is at least one minimal period when the putty lies somewhere between these two locations. The underlying physics is that the period depends on the interplay between two factors: the additional torque due to putty and the associated moment of inertia, both of which depend on the location of the putty. They... |
A Baseball Bat and Ball Collision Experiment for Students
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 7) |
| Halaman | : | 548–550 |
| Abstrak | : | When a batter strikes a ball, the outgoing speed of the ball depends on the swing speed of the bat, the incoming speed of the ball, and the impact point on the bat. Measurements are presented to show how the outgoing ball speed varies with the impact point. A similar experiment would be suitable for high school physics students with some familiarity with a head-on collision between two balls, using a school-supplied or their own baseball or softball bat and ball. Given the popularity of sporting activities, it is not surprising that the physics of sport features in many physics teaching articles. Several articles on baseball and softball can be found in this journal,1–3 but they do not specifically describe the collision of a bat and a ball. However, related articles can be found on the collision of a ball with a wood block.4,5 In elementary mechanics, collisions... |
Analyzing New Planetary Systems at School: Applications of Newton’s Law of Universal Gravitation and Kepler’s Third Law
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 7) |
| Halaman | : | 543–547 |
| Abstrak | : | As scientific knowledge expands, science education may not always keep pace with the latest advancements in astrophysics. A solid scientific education is crucial for preparing students for 21st-century challenges.1 However, science education often focuses narrowly on specific content, neglecting frontier scientific research. To address this, a teaching sequence was developed in Chile using real exoplanet data from the Open Exoplanet Catalog and NASA’s Eye on Exoplanets webpage. This integrates cutting-edge astrophysical concepts into classroom discussions. Analyzing this data prompts students to discuss how Newton’s law of universal gravitation and Kepler’s third law apply to current research on extrasolar systems. This sequence deepens understanding of these principles within modern astrophysics, enriching science education. Such activities spark new research questions akin to those debated in scientific circles, enhancing insights into planetary formation. When German astronomer Johannes Kepler (1571–1630) formulated the three laws of planetary motion, he based his work on Tycho... |
Newton and Hooke on the Nature of Light and Scientific Knowledge
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 7) |
| Halaman | : | 539–542 |
| Abstrak | : | What is light, and what is color? How did people figure those things out? What does it mean to know something in science? How do we construct valid scientific arguments for what we know? These are fundamental questions that all students need to have a basic understanding of, especially as our society increasingly questions the value of scientific knowledge and the trustworthiness of the scientific community. But these are not new questions. Scientists themselves struggled with these questions before the scientific enterprise was well established and respected by society. Therefore, it can be instructive to take students back to the dawn of the scientific age in order to tag along with some of the leading figures as they wrestled with them. This lets students get a glimpse of science in the making by all-too-human early scientists, in contrast to the highly refined and sanitized information found in textbooks. In this... |
Exotic Hadrons: A Subatomic Bestiary
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 7) |
| Halaman | : | 533–538 |
| Abstrak | : | Particle physicists study unfamiliar forms of matter—matter that hasn’t commonly existed in the cosmos since fractions of a second after the universe began. It has allowed scientists to dive down into an ever-decreasing set of size scales, from molecules, to atoms, to protons and neutrons, and even to quarks. The world of quarks can be a confusing one, but over the past couple of decades, it has gotten even more complicated. Using powerful particle accelerators, researchers have begun to create and study a truly new form of matter, one in which quarks are combined in unusual ways and one that will teach us some interesting new things about the strong nuclear force. The subatomic world has often been called a zoo,1 inhabited by a confusing array of particles, each with a dizzying collection of different properties: mass, spin, charge, lifetime, and production and decay modes, just to name a... |
An Interesting Shadow Observed during a Solar Eclipse
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 7) |
| Halaman | : | 529–532 |
| Abstrak | : | An interesting shadow was observed and photographed during the solar eclipse of 2017. It is displayed and discussed herein, and an explanation of its cause is presented. Before the 2017 total solar eclipse, we happened upon a comment in the fine book by Minnaert.1 He mentioned that during such an eclipse, the shadows cast by an observer’s fingers would be “clawed.” We looked for this photographically during the eclipse. A hand was elevated about a meter above a white sheet on a table (Fig. 1). We were surprised to see unexpected dark bulges at the junctions between spread-out fingers in the photos. (We did not see any obvious evidence of Minnaert’s “clawed shadows.”) Ours is not the only observation of this effect; an Internet search returns many pictures of such shadows, a number of which show the aforementioned bulges.2,3 We found no relevant discussion with these pictures,... |