1. The document contains 20 physics practice questions with solutions. The questions cover topics like wave propagation, standing waves, sound waves, resistors, capacitors, electric fields, lenses, and thermometers. 2. It provides the questions both in Indonesian and translated to English to make them accessible to an international audience. Detailed step-by-step workings are shown for each solution. 3. The practice questions cover a wide range of basic physics concepts and are intended to help students prepare for an exam.