This research aimed to determine the acceleration due to gravity: g, by using a free fall, a simple pendulum, a physical pendulum and the Atwood’s machine methods from an undergraduate laboratory. The experiments were designed for the student to think, analyze the data and interpret the results of an instrument using the principle of physics laboratory. In this study, the mean experimental...
This work aims to introduce a low-cost experimental set up using an Arduino board for studying the magnetic induction concept. We use a Hall Effect sensor to detect the magnetic fields inside a long solenoid applied the DC current. The results revealed that for the DC current varied from 20-160 mA, the Arduino sensor processed the magnetic fields in a range of 0.77 - 5.27 mT. Collected data...
This study aimed to develop STEM Education activities in Physics on designing and making Khom Loy (small Thai traditional hot-air balloons.) The local in the north of Thailand use Khom Loy to cerebrate important events such as Loy Krathong Day. The samples of this study were 35 students from 2 groups from high-school level and undergraduate level. The research instruments were 1.) a test of...
For various experiments to investigate quantum effects, matter-wave diffraction is an apparent example. Particle diffractions have been measured even at the large molecular level, such as the C$_{60}$ molecules. In order to describe the matter-wave diffraction of C$_{60}$ beam, we assume the initial wave functions behind a grating in form of the Fourier series with a Gaussian distribution...
A group of physicists from Mexico developed a standard test in vector conceptions without any physics related context called “Test of Understanding of Vectors (TUV)”. This test was first conducted as open-ended questions which later on was re-designed as a 20-item multiple-choice test. Since physics is a subject that involves quantities like vectors, and students’ understanding of concepts in...
An anemometer was fabricated from a low-cost material in a DIY (Do it yourself) process. It was composed of the rotating vane (it was modified from cooler CPU) which was installed with speed sensor on it. Then, it was connected with Arduino bond and contorted by LabVIEW program. This anemometer was called Anemometer based on LabVIEW interface for Arduino (ALA) model. Then, an ALA was...
Sound speed in the air can be measured from resonance phenomena in an open-open tube. In a typical undergraduate laboratory, sound is generated with a specific frequency, and lengths associated with resonance are recorded. Subsequently, those data can be used to determine the sound speed. Instead of using a specialized apparatus, this work demonstrates a method to measure sound speed using...
Schlieren photography is a technique used to capture air movement based on difference in fluid density. Air with higher temperature has lower density than surrounding air with lower temperature, leading to different values of refractive index. This work aimed to determine optimized conditions for schlieren photography to capture air movements in several situations. Schlieren photography was...
Pencil leads can be used to draw resistors, which are low-cost and easy to obtain. Not all types of pencils are considered good for pencil resistors because pencil lead is made up of graphite, an allotrope of carbon. Resistance of graphite varies with the grades used during manufacturing, as such we aimed to review and test several types of pencils would be best for developing DC pencil...
Instructional instruments play an important role in support students’ learning through the active learning approach. This research proposes a compound physical pendulum experiment using a photogate sensor. The sensor was set up to determine the frequency of an object vibrating back and forth using the application of an Arduino board. The designed sensor can measure the frequency in a range of...
A class of 17 grade ten students of The Demonstration School of Ramkhamhaeng University (Secondary Level) had been taught by modeling-centered instruction sequence (MCIS) on the topic of momentum for 2 hours. The students participated in nine learning steps of MCIS; (1) anchoring phenomena and central question, (2) construct an initial model, (3) empirical investigations, (4) evaluate and...
In this article, we explored students’ alternative conception from specific worksheet responses. The implemented worksheet from previous research study was designed to enhance students’ conceptual understanding of vector addition and subtraction. After administered the worksheet to 5 classes of 157 grade eight students in a general science course at a large public Bangkok school, we found...
Abstract
The aim of this study was to explore the students’ learning in Physics Laboratory with 103 undergraduate students in Yala Rajabhat University at Southern of Thailand. The data were collected by ASELL survey to investigate students experience in the Lab, open-ended questions to investigate students’ ability to do experiments and semi-interview of 10 students to investigate students’...
We investigate the first-year undergraduate students’ understanding concepts about the color of the Moon during Lunar Eclipse. The sample is 68 students from Physics, Chemistry and Biology major, school of science, University of Phayao. We use the 2 open-ended questions about the color of the moon and Lunar eclipse. The students ‘answers are analyzed from their drawing diagrams and/or text...
The development of metacognitive control in science classroom is the process of this study to review themselves. This study aimed to investigate the metacognitive control of 10 students through the use of the Metacognitive Development Process (MDP) that has the following overall objectives:1) to develop students’ metacognitive control for free content of science class 2) to develop students’...
Teaching and learning astronomy is not effectively in class event in the University level. Because the concept of astronomy is abstract and complicate for students. Many of student teachers have difficulty of how to create their lesson to help students learn astronomy. Because of they are not confident in concepts of astronomy. Especially in the concept of celestial sphere, the concept is very...
The purpose of this study was to develop a modern experiment apparatus using Arduino with LabVIEW to instead of the classical experiment. The sound frequency is generated from application on smart phone. The sound intensity and ultrasonic sensors are used to measure the sound intensity and displacement which is connected to the Arduino with LabVIEW. The resonance frequency for each harmonic...
Linear least square is a common method to fit two dimensional data set with linear relation. In non-linear case we need to do some linearization before fitting. Parameters can be extracted from the fitted line and used to predict new dependent variable values at new independent variable points. In this report we investigate the uncertainty introduced to a non-linear model prediction from...
This paper shows the physical nature of moment of inertia. The classical experiment is done using the pulley, string, a mass holder and a set of masses. The modern experiment is based on computer controlled with LabVIEW to interface with Arduino Uno R3. The DIY photogate is made of 30mA@5V laser and light diode resistance (LDR) that two different intensity of light are used as two logical...
In this research, virtual X-Ray diffractometer (XRD) using acoustic wave for material science education has been proposed. Acoustic wave with frequency in ultrasonic range has been used to characterize acoustic crystal structures. The dimensions of these model structures, which are in order of ultrasonic wavelength region, have been formed by three dimensional printer (3D printer) and cotton...