A pi helix (or π-helix) is a type of secondary structure found in proteins. Discovered by crystallographer Barbara Low in 1952 and once thought to be rare, short π-helices are found in 15% of known protein structures and are believed to be an evolutionary adaptation derived by the insertion of a single amino acid into an α-helix. Because such insertions are highly destabilizing, the formation of π-helices would tend to be selected against unless it provided some functional advantage to the protein. π-helices therefore are typically found near functional sites of proteins. (Wikipedia).
Pi is defined as the ratio of the circumference of a circle to its diameter. A frisbee is used to show the definition of pi. The units for pi, radians, are discussed. The conversion factor between revolutions, degrees, and radians is introduced. Want Lecture Notes? http://www.flippingphysi
From playlist IB Physics 6.1: Circular Motion
More important than knowing a bunch of digits in the decimal approximation of Pi is to understand what Pi means. Pi is the ratio of the Circumference to the Diameter of any circle. Multiply the diameter by Pi to get the circumference or divide the circumference by pi to get the diameter.
From playlist Lessons of Interest on Assorted Topics
This tutorial explains the meaning of Pi. Join this channel to get access to perks: https://www.youtube.com/channel/UCn2SbZWi4yTkmPUj5wnbfoA/join :)
From playlist All about Circles
This Pi Day is Round - Pi Day 3/14/16
This year, Pi Day is round. A rallying cry against those who would praise appearance over substance. Pi/Anti-Pi playlist: https://www.youtube.com/watch?v=jG7vhMMXagQ&list=PL5F03A9D6D278C5D9&index=1
From playlist Pi and Anti-Pi
PI: Dynamic Conceptual Illustration
Link: https://www.geogebra.org/m/Qz9CuJT8
From playlist Geometry: Dynamic Interactives!
How I would explain pi to a 6th grader…. Why is pi = 3.14? What is pi?
TabletClass Math: https://tcmathacademy.com/ Math help with pi and why it's equal to 3.14, also what is the number pi to include the definition of pi. For more math help to include math lessons, practice problems and math tutorials check out my full math help program at https://tcmatha
From playlist GED Prep Videos
What is the point on the unit circle for pi
👉 Learn how to find the point on the unit circle given the angle of the point. A unit circle is a circle whose radius is 1. Given an angle in radians, to find the coordinate of points on the unit circle made by the given angle with the x-axis at the center of the unit circle, we plot the a
From playlist Evaluate Trigonometric Functions With The Unit Circle (ALG2)
Line integral on a helix | MIT 18.02SC Multivariable Calculus, Fall 2010
Line integral on a helix Instructor: Christine Breiner View the complete course: http://ocw.mit.edu/18-02SCF10 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 18.02SC: Homework Help for Multivariable Calculus
Pi to e versus e to pi: which is larger? (Pi day short)
This is a short, animated visual proof demonstrating which of the values e^pi or pi^e is larger (where pi is the circle constant and e is Euler's constant) . #math #inequality #manim #animation #theorem #pww #proofwithoutwords #visualproof #proof #iteachmath #calculus #mathshorts
From playlist Pi
How to model Helical and Herringbone Gears; pros and cons (Gears pt 3/7)
Topics covered: 0:00 Modelling a helical gear using sweep 2:10 Creating a herringbone gear using mirror and combine 3:15 Creating a double helical gear 4:41 How to compute the angle to put into the sweep command 7:28 Positive and negative twist angles, or handedness 9:34 Transverse and nor
From playlist All about gears
How to model Worm Gears (Gears pt 7/?)
In this episode we're taking a look at how to model worm gears in Fusion360 for 3D printing. You can use these to transfer power between non-intersecting shafts, and with high gear ratios in a compact package. Primary downside is the low efficiency, and the resulting wear and heat buildup.
From playlist All about gears
Calculus 13.3 Arc Length and Curvature
My notes are available at http://asherbroberts.com/ (so you can write along with me). Calculus: Early Transcendentals 8th Edition by James Stewart
From playlist Calculus
From playlist Vector Calculus
Path integrals - How to integrate over curves. Chris Tisdell UNSW
This lecture introduces the idea of a path integral (scalar line integral). Dr Chris Tisdell defines the integral of a function over a curve in space and discusses the need and applications of the idea. Plenty of examples are supplied and special attention is given to the applications of
From playlist Several Variable Calculus / Vector Calculus
How did Newton Calculate Pi? #shorts
Newton used the binomial theorem and the calculus integral to be the first to calculate pi to many digits more than others before.
From playlist #shorts mathematicsonline
Parametric Plots in Mathematica
Using Parametric Plots to plot particle trajectories and surfaces in Mathematica. Also, using the "Manipulate" function.
From playlist Mathematical Physics II Uploads
Spontaneous helix formation in semiflexible polymers without confinement... by Apratim Chatterje
DISCUSSION MEETING : 7TH INDIAN STATISTICAL PHYSICS COMMUNITY MEETING ORGANIZERS : Ranjini Bandyopadhyay, Abhishek Dhar, Kavita Jain, Rahul Pandit, Sanjib Sabhapandit, Samriddhi Sankar Ray and Prerna Sharma DATE : 19 February 2020 to 21 February 2020 VENUE : Ramanujan Lecture Hall, ICTS
From playlist 7th Indian Statistical Physics Community Meeting 2020
Calculus 3: Line Integrals (17 of 44) What is a Line Integral? [y(sinz)]ds Example 5
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the line integral of [y(sinz)]ds where C is the helix x=cos(t), y=sin(t). Ex. 5 Next video in the series can be seen at: https://youtu.be/vTRQzlrVAn8
From playlist CALCULUS 3 CH 6 LINE INTEGRALS
Line Integrals, Mass, and Density -- Example 2 -- Calculus 3, Vector Calculus
Calculus 3 -- Vector Calculus and Differential Equations Playlist -- https://www.youtube.com/watch?v=UhuxxkOocdY&list=PL912tg7wFUfXIwSKeTyxU5LTqdRZ8Urza Line integral Example 1 -- https://www.youtube.com/watch?v=fmnYFM0C9W8 Line integral Example 2 -- https://www.youtube.com/watch?v=dW7SdW5
From playlist All Videos
Circle Area Derivation (visual proof)
This is a classic visual proof showing how to think about the area formula for a circle. #manim #math #mathshorts #visualproof #proofwithoutwords #mathvideo #theorem ___________________________ Music in this short: Losing Loop by Alexander Nakarada | https://www.serpentsoundstudios.com
From playlist Pi