104 - Wave Period and Frequency
In this video Paul Andersen explains how the period is the time between wave and the frequency is the number of waves per second. Period is measured in seconds and frequency is measured in Hertz. Wave period and wave frequency are reciprocals of one another. After watching this video you will be able to determine the period (and therefore the frequency) using a position vs. time graph of a wave.
Do you speak another language? Help me translate my videos:
http://www.bozemanscience.com/translations/
Music Attribution
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory
All of the images are licensed under creative commons and public domain licensing:
igjav, Ignacio javier. English: A Simple Red Lamp, Modern Look, July 27, 2011. Own work. http://commons.wikimedia.org/wiki/File:Bombilla_roja_-_red_Edison_lamp.svg.
———. Italiano: Icona Di Una Lampadina Spenta Realizzata in Svg, June 2, 2012. File:Bombilla amarilla - yellow Edison lamp.svg. http://commons.wikimedia.org/wiki/File:Gray_Edison_lamp.svg.
“Wave on a String.” PhET. Accessed April 13, 2015. http://phet.colorado.edu/en/simulation/wave-on-a-string.

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Bozeman Science

Traveling Waves, Standing Waves, Resonances, String Instruments, Wind Instruments, Musical Instruments
Lecture Notes, Oscillating Sound Cavities - Fundamentals of Wind Instruments: http://freepdfhosting.com/e79d2b1fa9.pdf
Assignments Lecture 26, 27 and 28: http://freepdfhosting.com/20495b808e.pdf
Solutions Lecture 26, 27 and 28: http://freepdfhosting.com/7759a06b8d.pdf

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Lectures by Walter Lewin. They will make you ♥ Physics.

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How do you use the arc length of a circle to find the diameter of a circle?
We will look at some application problems using sector area and arc length
A pie is cut into 6 equal pieces. The arc length of one piece of pie is 5.4 cm. What is the diameter of the pie?
So our strategy is to always draw a picture.
Let's start by drawing a picture of the pie and assume it is a circular pie. Let's draw 6 equal pieces. If we have 360 degrees divided by into 6 pieces our central angle is going to be 60 degrees. This gives you an idea of what we are working with. What we will do is use a " Proportion Method" to find the circumference, and then use the circumference to calculate diameter.
The proportion method it works like this. We take the arc length and put it over the circumference and set it equal to measure of the angle over 360 degrees. So let's plug in what we know. The arc length equals is 5.4 and we don't know circumference which will become x, and angle measure equals 60 degrees.
We then cross product1 times x and 6 times 5= 32.4 which equals my circumference.
Next we can work backwards to find the diameter.
Circumference = Diameter times Pi which is 32.4. So I will take 32.4 and divide it by Pi and I get 10.31
The pie's diameter is 10.31 centimeters.
That is how you use the arc length to find diameter of a circle.
You may also enjoy...
Circles Radius Diameter & Pi Math Learning Upgrade
https://www.youtube.com/watch?v=eiHWHT_8WrE
Diameter of a Circle Calculate diameter given circumference
https://www.youtube.com/watch?v=XGYqyYz29zo
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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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MooMoo Math and Science

► My Applications of Derivatives course: https://www.kristakingmath.com/applications-of-derivatives-course
Related rates problems are an application of derivatives and implicit differentiation that allow us to figure out how fast one thing is changing in relation to how fast something else is changing. For example, we might be interested in how fast an airplane is traveling compared to how fast the angle between the plane and an observer on the ground is changing.
Related rates problems allow us to do that by using implicit differentiation. We'll usually take the derivative of the equation, taking the derivative of every variable with respect to time t. Then we'll plug in for what we know and solve for the value we're interested in.
The key to related rates problems is getting the right equation set up. You need to figure out what equation you can write that will include the value you need to solve for. In addition to that, you may have to come up with a second equation that will give you the value for a missing variable that you need to plug into your first equation.
● ● ● GET EXTRA HELP ● ● ●
If you could use some extra help with your math class, then check out Krista’s website // http://www.kristakingmath.com
● ● ● CONNECT WITH KRISTA ● ● ●
Hi, I’m Krista! I make math courses to keep you from banging your head against the wall. ;)
Math class was always so frustrating for me. I’d go to a class, spend hours on homework, and three days later have an “Ah-ha!” moment about how the problems worked that could have slashed my homework time in half. I’d think, “WHY didn’t my teacher just tell me this in the first place?!”
So I started tutoring to keep other people out of the same aggravating, time-sucking cycle. Since then, I’ve recorded tons of videos and written out cheat-sheet style notes and formula sheets to help every math student—from basic middle school classes to advanced college calculus—figure out what’s going on, understand the important concepts, and pass their classes, once and for all. Interested in getting help? Learn more here: http://www.kristakingmath.com
FACEBOOK // https://www.facebook.com/KristaKingMath
TWITTER // https://twitter.com/KristaKingMath
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GOOGLE+ // https://plus.google.com/+Integralcalc/
QUORA // https://www.quora.com/profile/Krista-King

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Krista King

Featuring Dr. Stan Wagon, Professor of Mathematics - Macalester College. There is no better way to get someone's attention than with an assertion that just seems obviously wrong. Math is full of such things. The talk presents several surprising, even shocking, things from elementary mathematics, such as: A square wheel that rolls perfectly smoothly. A device that uses a normal rotating crankshaft to drill perfect square holes. An application of a non-circular wheel to sewage disposal. A shocking cake puzzle. Surprising new formulas for π. Benford's mysterious law of first digits. The Banach-Tarski Paradox, with constructible pieces.

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UNCA Ramsey Library Video Production

Astronomy in Ancient, Medieval and Early Telescopic Era of India by Prof. Amitabha Ghosh, Department of Applied Mechanics, IIT Kanpur.For more details on NPTEL visit http://nptel.ac.in

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nptelhrd

End of Year projects in sixth grade are open ended, allowing students to pick a topic that they would like to explore on the own. Since students are given little guidance, they are allowed the freedom to find ways that work and don’t work, and see the importance of planning. Mr. Holloway takes you behind the scenes for his End of Year Math projects. Read more here: http://powhatanschool.org/pulse/in-the-classroom/end-year-math-projects/
interested in more math videos:
Algebra I Class | Concussion Testing and Standard Deviation: https://youtu.be/jo1Im4E_HDQ
Geometry Class | Field Day Overview: https://youtu.be/hwBJFXBDOvM
Talking MATHCOUNTS: https://youtu.be/58Y1xdgRGpQ
Geometry of Field Day: https://youtu.be/v-E_bIxBcnc
Camp Counselors: https://youtu.be/qJUT8LlOExI
Upper School Retreat 2015: https://youtu.be/c3AwuxICmWg
Upper School Retreat 2014: https://youtu.be/-NFGkcuNfsY

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PowhatanSchool

Second semester of Classical Physics avail FREE with lectures, assignments, quizzes/Tests, discussions, G+ Hangouts @ World Mentoring Academy(a MOOC) http://worldmentoringacademy.com/www/...
Help make Foreign Language CC's:
Dr. Lewin's complete MIT physics lectures, now on the YouTube channel World Mentoring Academy(a MOOC)
This video was first published on the YouTube channel MIT OpenCourseWare under the title "Walter Lewin Promo" in 2007.
Attribution: MIT OpenCourseWare
License: Creative Commons BY-NC-SA 3.0 US
To view a copy of this license, visit http://creativecommons.org/licenses/b....
More information at http://ocw.mit.edu/terms/.
This YouTube channel is independently operated. It is neither affiliated with nor endorsed by MIT, MIT OpenCourseWare, the Internet Archive, or Dr. Lewin.

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Michael Williams