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Resonance frequency as a function of the inverse of the length. The lineal fit indicated in the legend allows to obtain the sound speed.
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We propose a home laboratory in which a telescopic vacuum cleaner pipe and a smartphone are used to investigate sound speed and acoustic resonance. When the pipe is hit or the hands clapped near one end, the sound produced is registered by a smartphone. The resonant frequency is obtained using a smartphone and an appropriate application. Varying th...
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... screenshot of the Advanced Spectrum app allows to obtain the spectrum of the sound as shown in figure 2. Repeating this measurement for different values of the length of the telescopic tube it is possible to register the resonant frequency for each length. In figure 3, we plot the frequency as a function of the inverse of the length of the tube and perform a linear fit whose slope corresponds to half the speed of sound. In this case, c = (343 ± 3) m s −1 . ...
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Citations
... Early work involving then new-age technology in physics experiments was performed in acoustics [1,2,3]. Resonance experiments in a tube have been conducted in various ways, such as by varying the frequency [4,5,6,7] or changing the length of the pipe [8,9,10], or by striking the pipe [11]. Hirth et al. also demonstrate the presence of fundamental frequencies and higher harmonics in their experiment [8]. ...
Almost anyone who regularly fills a bucket is well aware that the frequency of the sound changes as the bucket fills, and intuitively uses this to shut the tap at the right
time. The astute listener also knows that there is a subtle difference in the frequency
response depending on whether hot or cold water is filling the bucket. The authors,
experienced practitioners in the art of filling a bucket, use a modern variant of such a
setup (See Fig. (1)) to perform some delightful experiments monitored using a
smartphone. To determine the frequency and see the harmonics present the easiest
method is to place a smartphone next to the “bucket”, (without getting it wet!) and
perform a resonance tube experiment. We also show the variation of the speed of
sound as the air becomes warmer.
... The Covid-19 pandemic has had a deep impact on education globally and has forced us to rethink the way we teach and learn physics, as well as all other subjects [1,2]. Distance education becomes quite challenging, especially in laboratory courses [3]. ...
... One of the solutions that allowed students to continue their experiments during this period was to set up experiments at home with simple materials and use a smartphone as a measuring device [6]. As a result, home-based activities have become more important than ever before [1]. With the accelerating effect of the pandemic, the use of smartphones as digital measurement and experimentation media in physics has become a part of modern physics teaching and learning [7]. ...
... We know the moment of inertia of a uniform rod about an axis through one end is 1 3 ML 2 . The distance between the pivot and centre of mass is L/2. ...
In this study, a physical pendulum experiment, which is one of the basic experiments at the high school level, was carried out using Lego bricks and smartphones (Phyphox application) that students are familiar with in their daily lives. In this way, it is aimed to provide an example to students and teachers about low-cost, theory-compatible experiments that students can perform on their own in out-of-school environments, especially in mechanics. In addition, another aim of the study was to record the experiment on video and analyse it with a video analysis program (Tracker) and to compare the two methods (using a smartphone application and a video analysis program) in terms of results and usability.
... In the recent years, a plethora of scientific articles related to the creation of virtual and homemade laboratories have appeared [1][2][3][4][5][6][7][8]. This surge in interest has been specially motivated by the COVID-19 pandemic, during which students may not have had access to traditional laboratory equipment or may not have been able to attend in-person classes [9][10][11][12]. ...
In this article, we present a simple, cheap and effective method for measuring the capacitor charge and discharge processes using a Light Emitting Diode (LED) and the light meter of a smartphone. We propose a simple circuit in which the LED's brightness is linear on the capacitor's voltage, which allows us to use the smartphone to monitor the capacitor state with high accuracy. The method is tested experimentally, giving highly satisfactory results. This novel technique is highly advantageous due to its ease of implementation, the minimal required equipment and is adaptability for use in educational settings. Additionally, it provides an excellent way to introduce students to basic concepts of electricity and electronics.
In this article, we present a simple, inexpensive, and effective method for measuring the capacitor charge and discharge processes using a Light Emitting Diode (LED) and the light meter of a smartphone. We propose a simple circuit in which the LED’s brightness is linear on the capacitor’s voltage, allowing us to use the smartphone to monitor the capacitor state accurately. The method is tested experimentally, giving highly satisfactory results. Its exceptional combination of accuracy, minimal requirements, and ease of setup makes it an excellent way to introduce undergraduate students to the concepts of electricity and electronics in any educational setting.
Mostramos como los sensores incorporados en dispositivos móviles pueden ser utilizados como laboratorios portátiles al servicio de la enseñanza de las ciencias experimentales, especialmente de la física, en los últimos años de la educación media y los primeros de la universitaria. Describimos experimentos que antes requerían costosos aparatos o que no eran factibles en laboratorios de enseñanza. Finalmente, discutimos algunas perspectivas del uso de los sensores en la enseñanza de la física.
Teaching wave-physics and related phenomena with musical instruments results in a very pleasant and didactic approach for undergraduate students. Music allows teaching concepts such as frequency, amplitude, harmonics, resonance, and so on. In addition, one may use some instruments to calculate other quantities such as the air density or the speed of sound in the air. In this work, we use a conventional bamboo-made panflute and a smartphone to obtain the speed of sound in the air. The method is simple. It consists of making the pipes sound and measuring the frequency of the fundamental harmonic. The frequency is approximately proportional to the inverse of the pipe length and this dependence allows us to obtain the speed of sound quite accurately from the slope of the curve. We compare it with the theoretical value and analyse three possible causes of discrepancy such as the end correction, the air composition, or the straightness of the tubes. The proposed experiment can be carried out completely by the students since it does not involve any danger. In addition, it could be appropriate for undergraduate students or even school students.
Students' understanding to learn science on the concept of light refraction is experiencing serious problems because of the unobservable of light particles. The research object to be resolved in this study is to improve the concept of light refraction using a photodiode sensor. The problem to be solved in this research is to develop a Simple Kit (SK) Refraction of Light (RoL) using a photodiode sensor for students' understanding of concepts. The research method for making SK RoL using photodiode sensors using ADDIE, which consists of the first stage, analysis by analyzing the needs of SK RoL products using photodiode sensors to be developed. Second, the SK RoL design uses a photodiode sensor. Third, Development is developing SK RoL Using Photodiode Sensors. Implementation of the Fourth RoL Decree Using Photodiode Sensors to see student understanding of 74 students from tertiary institutions in one of the provinces in Indonesia. Fifth, Evaluation by revising the product at each stage of SK RoL development. SK RoL product research results include Green Laser, Photodiode sensor, Angle Arc, Display Module and Displayed Data, Arduino Uno R3 Atmega 328, Original Research Article: full paper (2023), «EUREKA: Physics and Engineering» Number 2 4 Physics and Astronomy Medium Container and Programs Using Arduino Software. The characteristics of the SK ROL results show that the SK RoL based on the Photodiode Sensor developed can be used as a physics learning medium because it can visualize the unobservable concept of light refraction and increase students' understanding of the concept of light refraction because of the nature of the particles which are difficult to understand by using a green laser which is passed through a photodiode sensor medium and Arduino can be visualized in a real way. SK RoL can work optimally in a room where the light is not too bright or requires a room that is a bit dark so it is possible to observe the laser beam. SK RoL, as a physics learning medium, can be used to increase students' understanding of the concept of light refraction. The implications of developing SK RoL can be used as a learning medium to attract students' interest in learning, support the learning process, and help make it easier for students to understand abstract physics concepts.
