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Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 2442515X     EISSN : 25281976     DOI : http://dx.doi.org/10.30870/gravity.vxix
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
The focuses of the manuscript received in the Gravity journal is limited to the topic: Physics Education (Media, Educational Policy, Assessment, Learning Model) Theoretical Physics Material Physics Earth and Environmental Physics Astrophysics Medical Physics Computational Physics and Instrumentation
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 3 Documents
 1 
Search results for , issue "Article in Press" : 3 Documents clear
Determine of the nira water viscosity by using video based laboratory falling ball method with tracker software Rianita Bela Islami; Lalu A. Didik; Bahtiar Bahtiar
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Article in Press
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v0i-.11991

Abstract

This study aims to determine the viscosity of sap water using a falling ball method based on a video based laboratory with tracker software. This type of research is experimental research with a quantitative approach. The viscosity of sap water is measured by varying the temperature, concentration and duration of fermentation. The temperature varied, namely 16 C, 27 C and 82 C. The concentrations were varied by comparing the viscoefficient value of pure sap water, sap water added with coconut water and mineral water. And for the fermentation time of the sap water was varied for 7 days, 9 days and 11 days of fermentation. The sap water with varying temperature, concentration and fermentation time has different coefficient values for the sap water. The sap water given the highest temperature has the lowest viscosity coefficient value. And the sap water with the highest concentration has the highest viscosity coefficient value as well. And the longest fermented juice showed the lowest value of the viscosity coefficient of sap water.
Analysis of model fit logistic parameter of work and energy material using unidimensional item response theory Yustiandi Yustiandi; Duden Saepuzaman
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Article in Press
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v0i-.11992

Abstract

This study aims to determine the suitability of the student response analysis on the test of work and energy materials with the logistic parameter model of item response theory. Another aim is to estimate item parameters according to a fit parameter logistic model (PL). This research is a quantitative research that was carried out on the responses of 1177 high school students spread across Banten Province. The instrument is a set of work and energy test consisting of 25 multiple choices. The analysis was carried out using the statistical method. The analysis showed the students' responses to the fit energy and effort test with 9 items of 1 PL model, 17 items of 2 PL model, and 16 items of 3 PL model. Based on the percentage, the 2PL model is suitable than 1PL and 3PL. So it can be concluded that the analysis of the work and energy test instrument fits the 2PL parameter model. Further analysis is the determination of the item parameter value by referring to the 2PL model, namely the item parameter difficulty level (b) and discrimination (a). From the analysis conducted, it was found that the difficulty level was in the range - 2.501 to 1.595 and the discrimination was in the range 0.289 to 1.109. Based on this analysis, it can be concluded that all items in this test are the good item criteria
Students’ understanding in airborne transmission of sars-cov-2 by dynamic fluid perspective using structure of observed learning outcomes (solo) taxonomy Bagus Helmeyanto; Eko Hariyono
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Article in Press
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v0i-.11993

Abstract

Online learning imposed by government as an impact of the COVID-19 pandemic affected students’ ability to understand the authentic problem. Authentic problem used to train students’ ability to apply their knowledge in physics. This research mainly discusses about the students' levels understanding of the authentic problem that is SARS-CoV-2 airborne transmission using the SOLO taxonomy. This research used a descriptive qualitative approach using eight questions related to SARS-CoV-2 airborne transmission. Data collected via online survey platform and analyzed by calculating the percentage of student's level of understanding for each given question. The result shown that 59% student included in pre-structural level, 19% included in uni-structural level, 10% included in multi-structural level, 3% included in relational level, and 10% included in extended-abstract level. 

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