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#iteachphysics

2 posts2 participants1 post today
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lutz_

@electricfusionQ #FediLZ #BlueLZ #Physik #PhysikEdu #Physik #iteachphysics

Ah, dann habe ich Deine Frage erst jetzt richtig verstanden.

Bei der im Video verwendeten Frequenz 3,4 kHz = 3400 Hz beträgt die Wellenlänge

\lambda = c/f = 340 m/s / 3400 Hz = 0,10 m = 10 cm.

Also müssten der untere und der obere Kopfhörer wahlweise 5 cm, 15 cm oder 25 cm voneinander entfernt sein, damit sich die beiden Schallwellen auslöschen (destruktive Interferenz)…

lutz_

#FediLZ #BlueLZ #PhysikEdu #MintEudu #Physik #iteachphysics

Eindrucksvolles Experiment zur destruktiven Interferenz gleichlaufender Wellen.

Ein Ohrhörer liegt im Inneren der Küchenrolle auf dem Tisch. Der zweite Ohrhörer wird von oben in die Rolle hinabgelassen. Am manchen Stellen löschen sich die beiden Schallwellen gegenseitig nahezu vollständig aus.

Mr. Spock würde sagen: „Faszinierend…!“

Joe Heafner

This book is in Ukrainian but the physics and math should be familiar. #ITeachPhysics

[2507.00064] Physics. Tasks With Solutions arxiv.org/abs/2507.00064

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arXiv.orgPhysics. Tasks With SolutionsThe study guide (textbook) is part of a set of materials designed to support high-quality practical training in physics. It includes a collection of tasks for organizing both in-class and independent work. The guide serves as a foundation for further study in physics-related disciplines and aligns with current educational programs. This textbook presents a curated set of 120 physics problems with detailed solutions, structured according to the first-year bachelor's curriculum. Each section addresses common student questions and emphasizes conceptual understanding. Problem-solving is essential in physics education. It not only tests knowledge but also transforms theory into practical skills. Applying physical laws to real-world scenarios enhances comprehension and fosters analytical thinking. Through solving problems, students gain deeper insight into physical phenomena and develop effective strategies for analysis, and develop solutions to tasks-making the learning process truly comprehensive.
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