This document discusses wave speed and the relationship between speed, frequency, and wavelength of waves. It states that the speed of a wave is equal to the frequency multiplied by the wavelength, and provides the equation v = fλ. It then gives examples of using this equation to calculate speed, frequency, or wavelength when two of the three values are known.
My learning object is meant to describe the definitions and formulas necessary to determine the various properties of a sound wave such as its power and intensity.
In this presentation, I explain what a standing wave on a string is, the difference between a standing wave and a travelling wave, and go over some practice problems.
For my LO, I gave some general equations which can be applied for standing wave questions and explained about the pattern of first, second, third harmonic. Then, I gave examples of different standing wave types found in instruments by clarinet and flute. I used a powerpoint to display my learning objective.
applicazioni dei moduli fmeca, weibull, what if e consumption monitoring di Inspiring Software presso un produttore di caffè, uno di birra ed uno di alimentari per l'infanzia
My learning object is meant to describe the definitions and formulas necessary to determine the various properties of a sound wave such as its power and intensity.
In this presentation, I explain what a standing wave on a string is, the difference between a standing wave and a travelling wave, and go over some practice problems.
For my LO, I gave some general equations which can be applied for standing wave questions and explained about the pattern of first, second, third harmonic. Then, I gave examples of different standing wave types found in instruments by clarinet and flute. I used a powerpoint to display my learning objective.
applicazioni dei moduli fmeca, weibull, what if e consumption monitoring di Inspiring Software presso un produttore di caffè, uno di birra ed uno di alimentari per l'infanzia
Vehicle and human vibration due to road condition - ROADEX IVJohan Granlund
This present ROADEX IV follow-up report describes results from demonstration projects in Scotland, Finland, Norway and Sweden over the period 2010 to 2012, where the case study from the Beaver Road 331 in ROADEX III has been reproduced. This document also reports on a study of the influence of road maintenance standard on truck ride vibration and vehicle internal noise, with special focus on winter road condition. Furthermore it reports on a study on vibration isolation from road to truck driver’s seat, by use of a Tyre Pressure Control System (TPCS). All measurements were carried out in the period 2010 - 2012.
A high repeatability between similar truck round trips was confirmed when using the ROADEX method to assess truck drivers’ daily vibration exposure A(8). Results from measurements of truck ride quality during the demonstrations included:
* Unacceptably high levels of driver´s daily vibration dose A(8) were recorded in all of the ROADEX Partner areas (the Norwegian E6-measurements were lower than the others but still at about the EU Action Value).
* Significant compression stress in the truck drivers spine were recorded at severe road damages, such as sharp frost heaves, settlements at bridges and culverts, improper
road/bridge joints and uneven transversal joints at both old and new asphalt repairs.
* In all Partner areas, intense truck roll vibration and lateral buffeting was recorded. This confirmed a special health and safety problem in the EU Northern Periphery (NP) cold
climates.
* The pavement condition parameter RBCSV (a “truck roll vibration indicator”) was further validated in addition to the previous ROADEX III study in Sweden. At sites with very high RBCSV, there is a risk that cargo latches might break due to high lateral acceleration.
* Winter conditions in the NP can result in significant corrugations in thick ice covering nonsalted roads, and extremely uneven frost heaves. The project results show that these conditions can make the ride vibration and noise much worse than during summer conditions.
* The use of a Tyre Pressure Control System (TPCS) has previously been shown to reduce ride vibration. The present study used a more detailed analysis to quantify the TPCS vibration isolating effect. Results from Scotland and Sweden show that TPCS was very efficient in isolating “shake” vibration from short wave road roughness (megatexture < 0.5 m) such as potholes and corrugated ice surfaces.
* Vehicle body “bounce” vibration with lower frequencies (1 – 3 Hz) were not isolated by the TPCS. Such low frequency bounce vibration can only be reduced by pavement maintenance.
* High side friction demand due to improperly banked horizontal curves was found to be a contributing factor behind many loss-of-control crashes, including rollovers.
* Several curves with tragic crash records were found to be improperly banked despite being newly resurfaced.
WAVES
INTRODUCTION
A wave is a period disturbance which transfers energy from one place to another.
There are two types of waves:
1. Mechanical waves
2. Electromagnetic waves
Introduce wavelength and amplitude for longitudinal and transverse waves, Show that wavespeed depends on the medium and frequency depends on the source, Introduce the wave equation
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.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
2. Introduction
Waves are one way in which energy is transferred from
place to place.
How quickly they do this depends on their speed, which
may be anything up to c, the speed of light, 3 x 108 m s-1
Speed, frequency and wavelength
The waves considered so far are described as
progressive waves.
They travel through space.
The speed, v of the wave indicates how fast it moves
The speed is the distance travelled per second by a
crest.
The opposite of a progressive wave is a standing wave.
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3. Speed, frequency and wavelength
Speed v is related to frequency f and wavelength λ by:
speed = frequency x wavelength
v = fλ
If a train of f waves, each of length λ, pass a point in
1 s, the total length of the train is fλ.
This is the length of the waves passing per second i.e.
the speed of the wave.
A note on units
frequency f is in hertz (Hz)
Wavelength λ is in metres (m)
Since 1 Hz = 1 s-1, multiplying f x λ gives a result in
m Hz, or m s-1. This is the correct unit for speed.
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4. Worked example
1. An observer, standing at the end of a pier, observes one wave
passing by every 8 s. the distance between adjacent waves is 12
m. calculate the speed of the waves.
Solution
Step 1 calculate the frequency of the waves.
f = 1 / T = 1 / 8 s = 0.125 Hz
Step 2 Note down the wavelength of the waves
λ = 12 m
Step 3 calculate the wave speed
speed v = fλ = 0.125 Hz x 12 m = 1.5 m s-1.
2. Calculate the wavelength of an electromagnetic wave (speed =
3 x 108 m s-1) of frequency 100 GHz.
Solution
Step 1 Write down the quantities; convert to scientific notation
(powers of 10): v = 3 x 108 m s-1 , f = 100 x 109 Hz, λ = ?
Step 1 rearrange the wave equation, substitute the values and solve
λ = v / f = 3 x 108 m s-1 / 100 x 109 Hz = 3 x 10-3 m
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5. Questions
1. Calculate the speed of ripples whose wavelength is
3 mm and whose frequency is 15 Hz.
2. Calculate the frequency of a sound wave if its
wavelength in air is 11 mm (speed of sound in air =
330 ms-1)
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