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All Journal Jurnal Ilmiah Mahasiswa Pendidikan Fisika JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) ORBITA: Jurnal Pendidikan dan Ilmu Fisika Asian Journal of Science Education Jurnal Pendidikan Geosfer Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education)
Elisa Elisa
Program Studi Pendidikan Fisika, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Syiah Kuala
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences

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AC Portable Tanpa Mengunakan Freon Sebagai Alternatif Pendingin Udara Ramah Lingkungan Elisa Kasli; Devi Rehan; Hilda Mazlina
Jurnal Pendidikan Sains Indonesia Vol 7, No 1 (2019): APRIL 2019
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (719.84 KB) | DOI: 10.24815/jpsi.v7i1.13544

Abstract

Penggunaan AC dianggap mampu menstabilkan suhu udara maupun kelembapan suatu area dengan sistem pendinginan. Namun, banyak masyarakat tidak menyadari bahwa penggunaan AC yang diperoleh melalui penggunaan bahan refrigerant atau biasa disebut Freon juga menjadi salah satu faktor terjadinya pemanasan global. Oleh karena itu, inovasi AC portable menjadi salah satu bentuk untuk mengurangi pemanasan global serta menghemat energi listrik. Metode yang digunakan adalah metode eksperimental dengan pengambilan data langsung terhadap alat uji. Pembuatan AC portable ini dilakukan pada tanggal 20 dan 21 Oktober 2018 di Laboratorium Fisika Jurusan Pendidikan Fisika Fakultas Keguruan dan Ilmu Pendidikan Universitas Syiah Kuala Banda Aceh. Data dianalisis secara teoritis berdasarkan data eksperimen dengan menetukan kondisi pada setiap siklus percobaan. Hasil penelitian AC portable tanpa mengunakan bahan kimia yang mengandung chloro flouro carbon (CFC) atau yang di sebut dengan freon dapat menurunkan suhu ruangan ukuran 3x4 m2 dengan besar perbedaan suhu sebesar 2 0C.
Analysis of the mechanical properties of banana stem fibers and coconut fibers through tensile strength measurement based on Hooke’s Law Kurniatillah Kurniatillah; Mawarni Saputri; Elisa Elisa
ORBITA: Jurnal Pendidikan dan Ilmu Fisika Vol 12, No 1 (2026): May (In Progress)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/orbita.v12i1.39050

Abstract

The utilization of natural fibers such as banana stem fiber and coconut fiber is still not widespread even though both have good mechanical properties. This study aims to compare the tensile strength of the two types of fibers using the hanging load test method. The study was conducted experimentally at the Physics Education Laboratory of Syiah Kuala University using four specimen groups with 20 samplesin each group (n = 20). The process includes drying the fibers indoors, cutting samples with a size of 20 cm for single fibers and 15 cm for bundles, measuring the diameter using a screw micrometer, and applying a load gradually until the fiber breaks. A total of 80 specimens were tasted using a purposive sampling technique, consisting of sigle banana fibers, sigle coconut fibers, banana fiber bundles, and coconut fiber bundles with relatively similar physical characteristics and diameters. The data obtained were analyzed descriptively using average values of stress, strain, and elastic modulus. The results showed that single coconut fiber had the highest stress of 4.49×10⁶ Pa, an elastic modulus of 2.30×10⁸ Pa, and a strain of 0.0210. Meanwhile, single banana fiber had a stress of 4.34×10⁶ Pa, a modulus of 3.57×10⁸ Pa, and a strain of 0.0017. Coconut fiber bundles showed a stress of 1.76×10⁶ Pa, a modulus of 1.29×10⁸ Pa, and a strain of 0.0145, while banana fiber bundles produced a stress of 1.77 × 10⁶ Pa, a modulus of 6.91 × 10⁸ Pa, and a strain of 0.0033. Coconut fiber was more elastic and less prone to breaking during testing, while banana fiber was stiffer and more prone to breaking. The results of this study concluded that coconut fiber is better suited for applications requiring flexibility, while banana fiber is better suited for applications requiring high stiffness. 
Co-Authors Abda Abda Abdul Hamid Agus Wahyuni Ahmad Farhan Ahmad Farhan Ainal Mardiah Aminullah Aminullah Asma Yani Devi Rehan Fajriani Fajriani Fitria Herliana Fitria Herliana Gani, Abdul Hafnati Rahmatan Hilda Mazlina I Made Astra Ibnu Khaldun Ismi Zatya Iskandar Kurniatillah Kurniatillah Latifah Hanum Mawarni Saputri Muhammad Syukri Mustafa Mustafa Ngadimin Ngadimin Nurhasanah, Nurhasanah Ramsyiah Ramsyiah Saminan, Saminan Shely Apriani Sri Mulyani Sri Wahyuni Sulastri Sulastri Susanna Susanna Tarmizi Tarmizi Wahyuni, Sri Windi Lestari Yusrizal Yusrizal Zainuddin Zainuddin