https://ejurnalunsam.id/index.php/JPFS/issue/feed GRAVITASI: Jurnal Pendidikan Fisika dan Sains 2021-01-11T03:31:30+00:00 Setyoko jpfs.unsam@gmail.com Open Journal Systems <p>GRAVITASI: Jurnal Pendidikan Fisika dan Sains merupakan jurnal peer-reviewed, yang diterbitkan secara berkala dua kali setahun pada bulan Juni dan Desember oleh Program Studi Pendidikan Fisika Fakultas Keguruan dan Ilmu Pendidikan (FKIP) Universitas Samudra. Gravitasi:&nbsp; Jurnal Pendidikan Fisika dan Sains ini berisikan artikel hasil penelitian ataupun hasil kajian studi literatur di bidang kajian Pendidikan Fisika dan Sains Fisika dengan scope: penerapan dan pengembangan model pembelajaran, Pengembangan media pembelajaran, kajian kurikulum, pembelajaran berbasis praktikum dan implementasi aplikasi terapan bidang sains fisika: Gravitasi, Termodinamika, Ilmu Bumi dan Antariksa, Sains Kebumian, Sains Komputasi, dll.</p> https://ejurnalunsam.id/index.php/JPFS/article/view/2270 Penerapan Model Pembelajaran Kooperatif Tipe NHT (Numbered Head Together) Menggunakan Rangkaian Limbah Detergen Untuk Meningkatkan Hasil Belajar Siswa Pada Materi Energi 2020-11-30T06:21:09+00:00 Devi Ratnasari deviratnasari.pipi1766@gmail.com Muhammad Yakob myakob@unsam.ac.id <p><em>Learning undertaken to achieve the educational goals and objectives of national development in general. To achieve the goal of education is carried out of learning by using learning models. The learning model should be involving the students actively in the teaching and learning activities, in order to improve learning outcomes. The purpose of this study is determine the learning outcomes of students with cooperative learning model type NHT (Numbered Head Together) using a series of waste detergents on the material energy. The method used in this research is experimental research method. Population is this research is as many 198 students of class X IPA which consists of 6 classes. While the sample as many 32 students of class X IPA 5. Based on the results of research in the analysis using the t test showed t<sub>count</sub> = 4,03 with the t<sub>table</sub>=1,9954 on the significant level of 5%. Because t<sub>count</sub> &gt; t<sub>table</sub> then it can be concluded that there is an increase student learning outcomes using cooperative learning model type of NHT (Numbered Head Together) on as series of waste detergents on the material energi in the class X IPA 5 SMA Negeri 3 Langsa. </em></p> <p><strong><em>Keywords :</em></strong><em> Cooperative Learning, Model NHT, Waste Detergent</em></p> 2020-11-30T06:21:09+00:00 Copyright (c) 2020 GRAVITASI: Jurnal Pendidikan Fisika dan Sains https://ejurnalunsam.id/index.php/JPFS/article/view/2907 PERBANDINGAN TEGANGAN LISTRIK YANG DIHASILKAN BUAH PEDADA (SONNERATIA CASEOLARIS) UTUH DENGAN BUAH YANG DIBELAH 2020-11-30T08:40:30+00:00 Thea Deninta denintathea@gmail.com <p><em>A research has been conducted which aims to find out how to increase the amount of electric voltage produced by pedada fruit (Sonneratia Caseolaris) with a fixed number of fruits. In this study using an experimental method by connecting copper electrodes (Cu) as a cathode and iron (Fe) as an anode. The fruit used is fruit pedada (Sonneratia Caseolaris) intact and divided. In measuring the strength of the current and voltage connected to the Multimeter with Cu and Fe electrodes as the link. The results showed that the current strength and voltage delivered by 7 whole pieces, namely for the number of 1 pedada is (0.1 mA; 0.53 V), for 2 pieces (0.11 mA; 1.09 V), for 3 pieces (0.13 mA; 1.4 V), for 4 pieces (0.13 mA; 1.75 V), for 5 pieces (0.14 mA; 2.5 V), for 6 pieces (0, 13 mA, 2.9 V) and for 7 units (0.15 mA; 3.2 V); and 7 parts divided by a quarter, namely for the number of parts a quarter of pedada fruit 1 part is (0.13 mA; 0.53 V), for 2 parts (0.15 mA; 1.03 V), for 3 parts (0.1 mA; 1.52 V), for 4 parts (0.13 mA; 2.05 V), for 5 parts (0.14 mA; 2.63 V), for 6 parts (0.13 mA; 3.27 V) and for 7 units (0.1 mA; 3.78 V). The voltage delivered by a quarter fruit is the same as a whole fruit, so it can be concluded that the fruit being cleaved is more effective in its use because it delivers the same voltage as a whole fruit.</em></p> 2020-11-30T08:40:30+00:00 Copyright (c) 2020 GRAVITASI: Jurnal Pendidikan Fisika dan Sains https://ejurnalunsam.id/index.php/JPFS/article/view/2902 Pengembangan Alat Kunci Pintu Selenoid Menggunakan Rangkaian Penurun Arus 2020-11-30T08:49:08+00:00 Era Fajira erafajira18@gmail.com <p>This study aims to determine the working principle of the current reducing circuit on the selenoid door lock so that it can function. The current reducing circuit is in the form of a simple power supply in the form of an AC current that has a reduced voltage. The current reducing circuit consists of a voltage reducer, a rectifier circuit, and a filter circuit. When the circuit is given an AC current and then converted to a DC current with a voltage of 12 V to make the selenoid door lock work. Selenoid door lock work systems, namely Normally Close (NC) and Normally Open (NO). if given a selenoid voltage will elongate (closed), while the way it works is NOT the opposite of NC. The research method used is Research and Development, with the 4D model. In this development model only uses 3 stages, namely defining, designing, and developing. Data collection techniques used were instrument validation in the media and teaching materials. The results obtained from media experts amounted to 74.29%, while the results from material experts amounted to 75%. From the percentage based on the scale used is the Likert scale, then the media and teaching materials are declared valid (can be used, with several revisions), so it can be concluded that the media and teaching materials can be used as learning media.</p> 2020-11-30T08:47:28+00:00 Copyright (c) 2020 GRAVITASI: Jurnal Pendidikan Fisika dan Sains https://ejurnalunsam.id/index.php/JPFS/article/view/2905 PENGEMBANGAN MEDIA KONVERSI ENERGI ANGIN MENJADI ENERGI LISTRIK 2020-11-30T23:45:28+00:00 lisa mustika lisamustika58582@gmail.com <p><em>This study aims to determine the working principle of the media for the conversion of wind energy into electrical energy and to test the feasibility of the media to convert wind energy into electrical energy which will be used as a learning medium on energy conversion material. This research uses the Research and Development (R&amp;D) development method and the development model used is 4D. In the 4D Model, the activities carried out at each stage of media development are the defining stage (Define), the design stage (Development), the development stage (Develop), and the dissemination stage (Disseminate), but in this study carried out only to the validation stage only and did not reach the stage of dissemination (implementation). The working principle of the conversion media of wind energy into electrical energy is by converting a kinetic energy from the air into mechanical energy which causes the rotation that occurs on the generator to produce an electric current. Wind energy is used to spin the blades so that the rotor rotates, when the rotor rotates, the generator will automatically flow electrical energy. The results of media validation carried out by media experts to see the percentage of the feasibility of the media conversion of wind energy into electrical energy as a whole is 60%, which means that this media is quite feasible to be used in learning media. As for the results of the overall material validation carried out by material experts in the media of the conversion of wind energy into electrical energy is 80%, which means that the material in this media is suitable for use in learning.</em></p> 2020-11-30T23:45:28+00:00 Copyright (c) 2020 GRAVITASI: Jurnal Pendidikan Fisika dan Sains https://ejurnalunsam.id/index.php/JPFS/article/view/2906 PENGEMBANGAN MEDIA LINTASAN “HIGH ROAD-LOW ROAD” PADA MATERI USAHA DAN ENERGI 2020-11-30T23:42:42+00:00 Lola Pratiwi lolapratiwi07@gmail.com <p>This research is intended to study the "HR-LR" trajectory media about business and energy material that can be developed and is suitable for use in learning activities. This research uses the Research and Development (R&amp;D) development method and the development model used is 4D. In the 4D Model, the steps of activities carried out at each stage of media development are the stages of definition (definition), design stage, development stage, and development of dissemination (dissemination), but in this study carried out only to the validation stage and not to the dissemination phase (implementation). Learning media on business and energy materials can be developed using the "HR-LR" trajectory. The validation assessment stage is carried out by media experts and material experts, using a questionnaire form validation. The questionnaire used by media experts and material experts each has 4 aspects of Value. The results of media validation carried out by media experts to see the percentage of the feasibility of the "HR-LR" trajectory media on business and energy material as a whole get a percentage of 70% which has the criteria as this medium is suitable for use in media learning activities. While for the results of the overall material validation carried out by the material experts to see the percentage of module eligibility in accordance with the media path "HR-LR" on business material and energy this gets a percentage of 76% who have an opinion about the material in this media both used in learning activities.</p> <p>Keywords : Business and Energy, Friction Style, Media development</p> 2020-11-30T00:00:00+00:00 Copyright (c) 2020 GRAVITASI: Jurnal Pendidikan Fisika dan Sains https://ejurnalunsam.id/index.php/JPFS/article/view/3161 Full Issue Journal 2021-01-11T03:31:30+00:00 Tim Redaksi GRAVITASI: JPFS setyoko.unsam@gmail.com <p>Full Issue Edisi Desember Vol 3 No 2 Tahun 2020</p> 2021-01-11T03:31:29+00:00 Copyright (c) 2021 GRAVITASI: Jurnal Pendidikan Fisika dan Sains