Rancangan Sederhana Penentuan Modulus Puntir Batang Besi untuk Pembelajaran Peserta Didik

Modulus puntir merupakan materi yang asing di kalangan pelajar, mereka lebih akrab dengan materi modulus Young. Ini dikarenakan sulitnya seorang guru menjelaskan fenomena dan eksperimen yang pasti tentang materi ini.  Percobaan sederhana penentuan modulus puntir batang besi telah dilakukan dengan menggunakan metode pelengkungan. Metode yang digunakan adalah dengan analisis regresi linier tanpa bobot hubungan antara sudut puntir dengan massa beban tambahan, dan pengambilan data untuk penentuan nilai modulus puntir batang besi dilakukan dengan variasi massa beban. Setiap variasi massa, sudut yang terbentuk diukur menggunakan busur derajad sebanyak 7 kali. Koefisien modulus puntir dapat dihitung dari gradien garis hasil regresi antara sudut puntir dengan massa beban tambahan. Setelah dilakukan regresi dari 7 data eksperimen, diperoleh nilai koefisien modulus puntir batang besi sebesar G=(0,055 ± 0,007) × 1012Pa, nilai ini tidak jauh berbeda dengan perkiraan nilai modulus puntir pada bahan-bahan yang sejenis lainnya

Analisis Kandungan Co2 dengan Sensor dan Berbasis Logger Pro di Daerah YOGYAKARTA

Penelitian ini bertujuan untuk menganalisis kandungan CO2 di daerah Yogyakarta dengan menggunakan sensor CO2 dan logger pro. Kota Yogyakarta setiap tahunnya mengalami kepadatan penduduk yang menyebabkan pesatnya pemakaian kendaraan bermotor juga. Ini yang menyebabkan tingkat polusi udara di kota Yogyakarta juga semakin buruk akibat polusi kendaraan bermotor maupun industri. Kandungan CO2 yang seharusnya di atmosfer bumi sebesar 381 PPM. Dalam penelitian ini menganalisis kandungan CO2 di sepuluh tempat keramaian di Yogyakarta. Penelitian ini menggunakan sensor gas CO2 Vernier dan di analisis menggunakan software logger pro. Ketika sensor CO2 bekerja selama 5 menit akan muncul pulsa kandungan CO2 pada logger pro, kemudian dicari rata-rata kandungan CO2. Hasil penelitian ini dapat diperoleh uji kandungan CO2 yang paling tinggi adalah di daerah 0 KM Yogyakarta sebesar 973,2 PPM. Hasil ini melebihi nilai batas ambang rata-rata yang seharusnya di atmosfir bumi yaitu 381 PPM. Oleh karena itu perlu ditanami pepohonan dan mengurangi emisi kendaraan bermotor agar tingkat kandungan CO2 di kota Yogyakarta semakin menurun

Penerapan Model Pembelajaran Problem Based Learning untuk Menganalisis Keterampilan Pemecahan Masalah Siswa SMP pada Materi Cahaya

The challenge of 21st century education is to prepare human resources who are required to have skills, one of which is problem solving. The Problem Based Learning (PBL) learning model is considered effective in training problem-solving skills because it has constructivist characteristics with science learning. The purpose of this study was to analyze students' problem solving skills in the Light material through PBL learning. The research method used is quantitative with descriptive analysis. The research sample was 22 Tanah Merah Integrated Junior High School students grade IX. The data collection technique used the observation sheet of problem solving skills. The results showed that there was an increase in students' problem solving skills from the first to the third experiment. The increase with the highest percentage was in the third experiment with indicators of problem solving/ investigation by 90.9%. The average data for each problem solving indicator shows that students can understand the problem by 80.78%, collect data by 69.63%, carry out problem solving/investigation by 78.46%, and make conclusions by 66.67%. These results indicate that the Problem Based Learning model can be used as a science learning construction in improving problem solving skills

Penerapan Model Pembelajaran Problem Based Learning untuk Menganalisis Keterampilan Pemecahan Masalah Siswa SMP pada Materi Cahaya

The challenge of 21st century education is to prepare human resources who are required to have skills, one of which is problem solving. The Problem Based Learning (PBL) learning model is considered effective in training problem-solving skills because it has constructivist characteristics with science learning. The purpose of this study was to analyze students' problem solving skills in the Light material through PBL learning. The research method used is quantitative with descriptive analysis. The research sample was 22 Tanah Merah Integrated Junior High School students grade IX. The data collection technique used the observation sheet of problem solving skills. The results showed that there was an increase in students' problem solving skills from the first to the third experiment. The increase with the highest percentage was in the third experiment with indicators of problem solving/ investigation by 90.9%. The average data for each problem solving indicator shows that students can understand the problem by 80.78%, collect data by 69.63%, carry out problem solving/investigation by 78.46%, and make conclusions by 66.67%. These results indicate that the Problem Based Learning model can be used as a science learning construction in improving problem solving skills