This document discusses standing waves on a string. It explains that standing waves on a string, called normal modes, have frequencies corresponding to an equation that is proportional to the square root of the tension in the string and inversely proportional to its length. Higher frequencies correspond to higher harmonic values. The document also provides an example of calculating the frequency, period, wavelength and speed of a vibrating string based on given information about its length and number of vibration cycles over time.
Learning Object- Standing Waves on Stringskendrick24
This is my learning object about standing waves on a string. I talk about the harmonics, the equation for calculating the frequency for a wave on a string, and gave an example problem.
Learning Object- Standing Waves on Stringskendrick24
This is my learning object about standing waves on a string. I talk about the harmonics, the equation for calculating the frequency for a wave on a string, and gave an example problem.
My Learning object describes what standing waves are, how to determine where the nodes and antinodes of a standing wave are and also about the fundamental and resonant frequencies. Their is a variety of questions from multiple choice, to true and false and also a problem solving question.
My Learning object describes what standing waves are, how to determine where the nodes and antinodes of a standing wave are and also about the fundamental and resonant frequencies. Their is a variety of questions from multiple choice, to true and false and also a problem solving question.
This Learning Objective gives a broad look at the basics of Harmonic Waves. Definitions, equations and examples of basic clicker questions are provided as well as the answers and the solutions as to how these questions are properly done.
This LO gives you a simple easy to understand explanation of what a standing wave is (video included) and how it is different from a travelling wave. Afterwards a few sample questions are given to apply knowledge.
This learning objective consists of two questions about standing waves on a string. An explanation for both solutions are provided with the workings to the solution.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
2. The Basics
Where L is the length of the string Source: http://www.physicsclassroom.com/class/waves/Lesson-4/Mathematics-
of-Standing-Waves
3. Must be in slideshow format to view gif
Source: http://www.physicsclassroom.com/class/waves/Lesson-4/Mathematics-of-Standing-Waves
4. Normal Modes
• Standing waves called normal modes of the vibration of a
string have frequencies corresponding to:
• fm = m/2L *√(T/μ)
• The fundamental frequency is proportional to the square
root of the tension in the string and inversely proportional
to its length and to the square root of the linear mass
density.
• Higher frequencies correspond to higher values of m:
• fm = mf1 m = 1,2,3,4….
• Therefore the first few allowed harmonics are:
• f1 = 1/2L √(T/μ) f2 = 2f1 f3 = 3f1 and so on…
5. Test Your Knowledge
• The string below is 1.5 meters long and is vibrating as the
first harmonic. The string vibrates up and down with 33
complete vibrational cycles in 10 seconds. Determine: the
frequency, period, wavelength and speed for this wave.
Frequency f =
Period T =
Wavelength λ =
Speed v =
Source: http://www.physicsclassroom.com/class/waves/Lesson-4/Mathematics-
of-Standing-Waves
6. Answer
• Frequency f =3.3 Hz
• Period T = 0.303 seconds
• Wavelength λ = 3.0 m
• Speed v =9.9m/s
Given: L = 1.5 m
33 cycles in 10 seconds
The frequency refers to how often a point on the medium undergoes back-and-forth vibrations; it is measured as the number of
cycles per unit of time. In this case, it is
f = (33 cycles) / (10 seconds) = 3.3 Hz
The period is the reciprocal of the frequency.
T = 1 / (3.3 Hz) = 0.303 seconds
The wavelength of the wave is related to the length of the rope. For the first harmonic as pictured in this problem, the length of the
rope is equivalent to one-half of a wavelength. That is, L = 0.5 • W where W is the wavelength. Rearranging the equation and
substituting leads to the following results:
W = 2 • L = 2 • (1.5 m) = 3.0 m
The speed of a wave can be calculated from its wavelength and frequency using the wave equation:
v = f • W = (3.3 Hz) • (3. 0 m) = 9.9 m/s
