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This research is intended to provide an in-depth understanding of physics material regarding upward vertical motion, downward vertical motion, and free fall motion using a demonstration learning model. The purpose of this article is to provide a reference learning model that can be used by teachers when presenting physics material so that it is not boring and is easy to understand. This learning model is effectively applied in almost all physics material, including upper vertical motion, lower vertical motion, and also free fall motion. Because the teacher's role is important in increasing students' interest in learning and making the class atmosphere more enjoyable when delivering the material, this article is very helpful and can be a reference source that can be used when determining the model for learning movement material.

Students' understanding of physics concepts differs from one student to another. Based on the results of the five-tier conceptual diagnostic test, students' conceptions can be grouped based on several levels of conception. One of them is a misconception. This study aims to develop a five-tier format test instrument on Newton's Law material, test the validity and reliability of the test instrument, and use test instruments that have been developed to determine the level of conception of 20 students. The question instrument developed has been declared valid and reliable. The results of the final trial of 20 students showed that more than 50% of students experienced misconceptions. 

Latar Belakang: Lymph node cancer in the case of Hodkin's Lymphoma is a type of cancer. Lymphoma is a solid tumor of the immune system. Hodgkin lymphoma (HL) accounts for about 10% of all lymphomas. The Intensity Modulated Radiation Therapy (IMRT) technique is one of the cancer treatment techniques in Hodgkin's Lymphoma cases. The aim of this research is to determine the procedure and reasons for using the IMRT technique in lymph node cancer in Hodkin's Lymphoma cases.Metode: This research is qualitative research with a case study approach using retrospective data. The research time is from 24 to 30 May 2023 and the research location is in the Department of Radiation Oncology, RSUP Dr. Hasan Sadikin Bandung. The research subjects consisted of Radiation Oncologists, Medical Physics, Radiotherapists. Researchers collected data from patient medical records, made interview transcripts and carried out data reduction and processed it using open coding, and provided it in the form of quotations and then drew conclusions.Hasil: The procedure for irradiating Hodgkin's Lymphoma using the IMRT technique at the RSHS Department of Radiation Oncology begins with positioning the patient on the examination table with a fixation device and arranging the patient according to the reference point of the CT Simulator and making a thermoplastic mask then carrying out verification and irradiation. The IMRT technique has the advantage of using MLC so that the radiation is modulated according to the contour of the target and the disadvantage of precise dose distribution in limiting the radiation dose to organs at risk.Kesimpulan: In the case of the Department of Radiation Oncology, Dr. Hasan Sadikin Hospital, Bandung, the IMRT technique was used with consideration, namely that the IMRT technique already uses MLC which creates individual blocks automatically according to the projections depicted on the TPS.  

In this study, researchers approached the study through theory and physics. Surabaya has established itself as a city of services and commerce. In addition, Surabaya is a business city where various events take place. As a shop, Surabaya is a one-stop shop. All activities take place here and all supporting facilities are available. Trading is the main activity in Surabaya. Geographically, Surabaya actually emerged as a commercial city. Since the colonial era, the kingdom of the Majapahit era, trade has become the main activity. Currently trading activities in Surabaya are not limited to regional and national needs. Surabaya has become a city of international trade. As a commercial city, Surabaya has several important pillars. These places become spaces for commercial activities. The modern market is the most important pillar of Surabaya's status as a commercial city. Attractive layout, comfortable atmosphere, and competitive prices are the hallmarks of a modern market that fits with the dense activity of city dwellers. Modern markets are scattered throughout the center and suburbs of Surabaya. The presence of many modern markets provides more choices for the community. This number will continue to grow as investment in Surabaya increases. Kampung Surabaya is a living space for Surabaya residents. Apart from houses, villages in Surabaya are also production centers. The village is now emerging as a small economic center. Each village has its own special food, pastries, jewelry, clothing and more. Due to the influence of the city government, these villages are now designated as leading villages and have the potential to strengthen the economy of the less fortunate.

Adisutjipto Angkasa High School in the laboratory has a fire risk and has some carbon content in the air which disturbs the respiratory system of the laboratory users. As for the manufacture of smart door lock products that have an important function value, namely as a tool for emergency needs when work accidents occur in the chemical laboratory and physics laboratory environment. The method used in this study is usability using the Use Questionnaire with validity and reliability measurements. The population in this study was 72 students of Angkasa Adisutjipto High School and the sample of this study was 41 students of Angkasa Adisutjipto High School. The results of this study show that the R value with df=39 and the correlation is significant at the 0.05 level and 2-tailend is 0.3081. reliability test results with a Cronbach's Alpha value of 0.756.

The research included the head of the laboratory, laboratory staff, physics teacher, students, and physics laboratory facilities at SMA Negeri 4 LANGSA as subjects. Data collection techniques comprised observation sheets, questionnaires, interview guides, and documentation. The study's results encompassed interviews conducted with the head of the laboratory, physics teachers, and students. These findings will be presented in a table format. Based on observations at SMAN 4 Langsa, the laboratory equipment was deemed relatively good, with nearly 80% completeness. Consequently, it can be concluded that the standardization of the physics laboratory's facilities and infrastructure at SMAN 4 Langsa is close to meeting good standards due to its sufficient facilities and infrastructure. However, the standardization of physics laboratory management competency at SMAN 4 Langsa is not fully compliant with the regulations outlined in the Minister of National Education of the Republic of Indonesia's No. 26 of 2008. Additionally, the effectiveness of utilizing physics laboratory facilities and infrastructure at SMAN 4 Langsa indicates poor quality.

Physics is a branch of science that requires more cognitive abilities, while the ability to receive information from each person is different. One effective way to deliver information is to use simulations.This research was conducted at SMA Veteran Purwokerto, research participants were students of class X, a case study that explored a group of students, with the method of observation and literature study. This study aims to find out the increase in students' understanding of concepts that are specifically related to Regular Straight Motion and Straight Changed Irregular Motion through learning media, and to determine student involvement in the learning process. To find out whether or not there was an increase in students 'understanding of the concept of Straight Motion Straight Motion Irregularly Changed, researchers compared students' understanding before and after learning with learning media.The results showed that overall there was an increase in understanding of the concepts of Irregular Straight Motion and Irregularly Changed Straight Motion, overall student involvement was very active.