Jurnal Ilmu Fisika dan Pembelajarannya (JIFP)

Heart, Magnetic Field, Healthy KORELASI MASSA TUBUH TERHADAP DETAK JANTUNG PADA MENCIT BALB-C YANG DIPAPAR MEDAN MAGNET EXTREMELY LOW FREQUENCY (ELF) INTENSITAS 100 µT

Siti Hindun Hindiyati — Wed, 27 Sep 2023 12:48:08 +0000

Exposure to an Extremely Low Frequency (ELF) magnetic field with an intensity of 100 µT has been set as a threshold value for health effects, but it still needs to be studied for its biological impact, especially on the function of the heart organ. This study aims to examine "The Correlation of Body Mass to Heart Rate of Balb-C Mice Exposed to an Extremely Low Frequency (ELF) Magnetic Field of 100 µT Intensity". This study used a True Design Experiment with a completely randomized design (CRD), by subjecting Balb/C mice to an ELF magnetic field intensity of 100 µT intermittently for 2 hours/day for 15 days and 30 days. A sample of 21 Balb/c mice was divided into 3 groups, the control group, and 2 groups exposed to an ELF magnetic field of 100 µT intermittently 2 hours/day for 15 days and 30 days. The variables measured in this study were body weight and heart rate per second. Weight measurements were carried out using a digital balance with an accuracy of 0.00gr with 3 measurements accompanied by 3 observers while heart rate measurements were carried out by manually counting using the human senses assisted by using a stopwatch as a timer for 5 minutes each. The data from this study were analyzed using correlation statistical analysis using SPSS 23 software. The results showed that the ELF magnetic field intensity of 100 µT on the 30th day had higher body mass and heart rate than the control group. This is because the intensity of 100 µT causes excessive muscle work in the hearts of Balb-C mice

Analysis of Safe Distance On Mobile Electromagnetic Radiation While Sleeping

Widya Nugraheni Widiningrum — Wed, 27 Sep 2023 12:48:08 +0000

Mobile phones radiate electromagnetic radiation at certain levels can harm the health of the human body. This study aims to determine the amount of electromagnetic radiation from the magnetic field and radio frequency radiated by mobile phones to the safe distance of humans while sleeping. This study uses a purposive sampling technique and measures with an application on a mobile phone. The magnetic field emitted by mobile phones is measured with the "Phypox" application magnetometer, while the radio frequency uses the "Quanta Monitor" application to measure SAR values. The magnitude of the mobile phone's magnetic field is inverse to the measuring distance. The closer the measurement distance, the greater the magnetic field. The amount of radio frequency at the SAR level of the mobile phone has an inverse relationship to measuring distance. The closer the measurement distance, the greater the resulting SAR value. The magnitude of the magnetic field generated by the source mobile phones are still far from the WHO-recommended magnetic field radiation exposure threshold value, the SAR results measurement generated by the mobile phone is relatively small and below the safe limits set by the IEEE and FCC, so if it follows WHO, IEEE and FCC standards then All research mobile phone objects have a safe distance of 0 cm from humans while sleeping.

ANALYSIS OF STUDENTS' CRITICAL THINKING ABILITY IN GLOBAL WARMING MATERIALS AT SMA PGRI 2 PALEMBANG

Murniati Murniati — Mon, 26 Jun 2023 02:15:12 +0000

This study aims to determine the level of students' critical thinking skills on global warming material. His research method is descriptive quantitative, namely explaining what is by using statistics. The research population was all students of class XII SMA PGRI 2 Palembang, using a purposive sampling technique as samples were students of class XII-IPA 3, which consisted of 32 students. The instrument used is in the form of critical thinking questions in the form of essays, referring to Ennis' critical thinking. Students' critical thinking abilities are grouped into Elder and Paul's thinking skills into 4 groups, namely uncritical, less critical, moderately critical and critical. The results showed that students' critical thinking skills in global warming material were low because of all Ennis' critical thinking indicators, students scored below 45%. When viewed based on the critical thinking level of Elder and Paul, students are at an uncritical level, namely TBK 0, 37.5% not critical, TBK1, 50%, less critical, TBK2, 9.4% quite critical and TBK3, 3.1% kirits. The results of the study concluded that students' critical thinking skills on global warming material needed to be improved by training students to solve a problem from various points of view.

Analysis of Students' Critical Thinking Skills Test Results on Parabolic Motion Material

Leni Marlina, Anisa Ramadhani — Mon, 26 Jun 2023 02:16:10 +0000

This study aims to describe students' critical thinking skills on projectile motion at SMA Srijaya Negara. The research method used is the quantitative descriptive method. The test was given to 101 students of classes X IPA. In general, the results of the research show that the critical thinking skills of SMA Srijaya Negara in X grade on projectile motion are still very low. Observing and judging observation is the highest sub-indicator of critical thinking skills in three classes: X IPA 1 (74,29%), X IPA 2 (45,45%), and X IPA 3 (48,48%). Meanwhile, the lowest is focusing on a question at X IPA 1 (2,86%) and X IPA 2 (0,00%). At X IPA 3, the lowest are deducing and judging deductions (0,00%) and making and judging value judgments (0,00%). Because of this, students' critical thinking skills still need to be improved. Students must be more active in their learning, and teachers must encourage students to think critically.

Needs Analysis of Integrated 4C E-Module Development as Implementation of Collaborative and Participatory Class Key Achievement Indicators

Anggreini Anggreini, Dimas Permadi, Novinta Nurulsari — Mon, 26 Jun 2023 02:17:02 +0000

program which is designed to fulfill IKU 7.However, the implementation is considered not optimal for the MPP Subject Learning Outcomes (CPMK). The purpose of this study was to determine the circumstances and needs of prospective physics teacher students when carrying out collaborative and participatory classroom learning. As well as analyzing materials and tasks to achieve CPMK MPP. This study uses a descriptive analytical method with a research instrument in the form of a questionnaire distributed online with the help of a google form. The sample in this study was 58 student teacher candidates for the Physics Education Study Program, University of Lampung. The results showed that students already had the ability to communicate and collaborate in group assignments, but only a small proportion had the ability to think critically and creatively when solving a case study of educational research. In addition, students still do not actively participate in class discussions, due to a lack of understanding of the material discussed. This is due to the unavailability of teaching materials and learning media that are systematically arranged in accordance with CPMK, the case studies discussed are not examples of educational research. Analysis of the developed materials and tasks obtained details of five chapters achieved for the six sub-CMPK MPP. Based on the results of this needs analysis, lecturers need to develop teaching materials and learning media in the form of digital modules that are integrated with 21st century skills, namely critical thinking, collaboration, creativity, and communication to support the achievement of KPI 7 for the MBKM program.

ANALYSIS OF PHET SIMULATION-BASED LABORATORY VIRTUAL PRACTICUM GUIDE TO IMPROVE CRITICAL THINKING SKILLS OF SOUTH SUMATRA VOCATIONAL SCHOOL STUDENTS

lita surya — Wed, 27 Sep 2023 12:48:08 +0000

This study is an experimental study that aims to see the learning outcomes and increase the critical thinking skills of students in experimental Class 1 (Class X TITL 1) SMK Negeri Sumatera Selatan in the academic year 2021 – 2022. Considering that it is still in the covid 19 pandemic condition, this research was carried out in a virtual physics laboratory in April – May of the even semester using practicum guides and PhET media with direct current electricity materials, namely Ohm's law and Kirchoff's law. The study population was Class X TITL (electrical installation engineering) with research samples in Class X TITL 1 as experimental class 1 (Using PhET media) and X TITL (electrical installation engineering) 2 as experimental class 2 (not using PhET media). With the results of the analysis after using the practicum guide to prove the truth of the hypothesis stated by the researchers that there is a positive influence in the application of virtual learning activities in the Physics Laboratory of SMKN Sumsel using PhET media as a simulation medium so that the learning objectives of physics in improving the ability and critical thinking skills are quite achieved in Class X TITL (electrical installation engineering) 1 as an experimental class 1.

Keywords: virtual lab, practicum guide, Phet simulation and thinking creative