In this video I go over Part 3 of the surface area for parametric curves videos series, and this time extend the formula derived in Parts 1 and 2 even further. The formula derived was for determining the surface area of a shape formed by rotating the parametric curve about the x-axis, but in this video I show that it is in fact similar for if it’s rotated about the y-axis. The only thing that changes is the “radius” of a segment being rotated becomes “x” as opposed to “y”. I also I show that the symbolic representation of the surface area is the same as that for surface area of a regular function, and similar to the arc length formula, which I have covered in earlier videos. Basically we can replace the arc length segment thickness with “ds”. I show the visual representation of this term and corresponding formulas for the shapes formed by rotating by the x and y-axis. This is a great video to get a better understanding of just how the surface area formula is visually represented which helps in memorizing how to apply this formula, so make sure to watch this video!
In this video I revisit the Tengri 137 Odin’s Triple Horn video that I made in my last video, and this time provide some further clarification, as well as correcting a few of the points that I had made in that video. First off, I made some mistakes in one of the matrix transforms that I showed in that video, and have since corrected it on the corresponding Excel sheet, but the overall video is still correct in that the Tengri 137 squares are simply made through matrix transformations. All that specific corrected matrix transformation only works in obtaining the Tengri squares 1, 3, 4, 5. To obtain the Tengri square 2 and 6, as discovered in my last video, we first need to rotate any of the other squares clockwise by 90 degrees.
Also in this video, I illustrate visually what the Tengri squares represent, by graphing all of the numbers for each square, as well as comparing them with a square that I made by adding 158 to one of the distinct 4x4 perfect squares. This visual representation shows that the Tengri squares are simply transformations of my square, by moving numbers in groups of four the left and to the right of the center of the series of numbers. This is likely the basis for the Tengri 137 puzzle makers, and shows that the makers of these puzzles are very talented (and likely bored) mathematicians. I developed an Excel sheet to show this, and you can download and play around with it. I also included in it a simple “Magic Matrix Manipulator #MMM” which uses a “magic zero matrix transformation” that is a perfect square that all sum up to zero. This means that we can add this matrix to any other matrix to manipulate the numbers, without having to affect the current magic constant, in our case 666.
In later videos I will look to derive the origins of the 3 distinct 4x4 perfect magic squares, so stay tuned for that! Also note that we can use any of these 3 distinct squares to obtain the Tengri squares. These distinct squares are just in the simplest form that can be written, not counting rotations, etc.
Also, there are some more amazing and cool mathematics puzzles in the Tengri 137 documents, so I will research more into them to see if I can solve them. Whether Tengri 137 is made by aliens, or very talented (and bored) mathematicians, they are nonetheless very cool math puzzles and calculations, and are pretty fun to analyze and solve them! So stay tuned for my later videos!
Download the notes in my video:
Written Notes: https://1drv.ms/b/s!As32ynv0LoaIhusu7DlcCEHj6qha2A
Excel Notes: https://1drv.ms/x/s!As32ynv0LoaIhutbP-FTgMxOa2f-pQ
View video notes on the Hive blockchain: https://peakd.com/@mes/video-notes-tengri137-part-3-tengri-137-odin-s-triple-horn-visual-representation
Related Videos:
View the Full #Tengri137 Series: https://mes.fm/tengri137-playlist
?#Tengri137 Part 5: EPIC Intergalactic Battle: @666ab731 vs. @MathEasySolns: https://youtu.be/6hB7Xj5B5ls
?#Tengri137 Part 4: Tengri 137: Odin’s Triple Horn: Calculator + AMAZING MES "Sigma" Symbol: https://youtu.be/iXYehXgSUVQ
?#Tengri137 Part 2: Odin’s Triple Horn: Most Perfect “Diabolic” Magic Squares: https://youtu.be/4V9NVCMvoyI
?#Tengri137 Part 1: "Magic" Cubes Calculator + Linear Algebra Matrix Tutorial: https://youtu.be/3YxmH6ATD-k .
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In this video I show that the dot product can be utilized to write any vector in the form of its direction angles and direction cosines. Using the geometric interpretation of the dot product from my earlier video, I show that each component of a vector is equal to the cosine of its direction angle. Note that direction angles are the angles that a vector makes with each of the x, y, and z axes. I also go over an example in calculating the direction angles.
The timestamps of key parts of the video are listed below:
- Direction Angles and Direction Cosines: 0:00
- Example 5: 14:32
This video was taken from my earlier video listed below:
- Vectors and the Geometry of Space: The Dot Product: https://youtu.be/9uqtIk5iHys
- Video notes: https://peakd.com/hive-128780/@mes/vectors-and-the-geometry-of-space-the-dot-product
- Playlist: https://www.youtube.com/playlist?list=PLai3U8-WIK0GbHgvpTY1mx61nTNO-Msl8
Related Videos:
Vectors and the Geometry of Space Playlist: https://www.youtube.com/playlist?list=PLai3U8-WIK0FjJpwnxwdrOR7L8Ul8VZoZ .
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https://www.youtube.com/watch?v=yuBhap9cgj0
In this video I go over the equation of a sphere by utilizing the distance formula in 3D I solved earlier. A sphere is by definition just the set of all points whose distance from a particular point (the center) is equal to a constant r or radius. I go over the equation of the sphere for a center at an arbitrary point in space and also when the center is at the origin.
The timestamps of key parts of the video are listed below:
- Example 5: 0:00
- Equation of a Sphere 3:07
This video was taken from my earlier video listed below:
- Vectors and the Geometry of Space: 3D Coordinate Systems: https://youtu.be/xJ-qPJFf2gE
- Video notes: https://peakd.com/hive-128780/@mes/vector-space-and-geometry-3d-coordinate-systems
- Playlist: https://www.youtube.com/playlist?list=PLai3U8-WIK0GiAJeLMzhOsrMliibfce5m
Related videos:
Vectors and Geometry of Space video series: https://www.youtube.com/playlist?list=PLai3U8-WIK0FjJpwnxwdrOR7L8Ul8VZoZ .
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https://www.youtube.com/watch?v=49qZEuhNhbI
In this video I go over a quick derivation of the hyperbolic trig identity sinh(x – y) = sinh(x)cosh(y) – cosh(x)sinh(y). The derivation simply uses my past work on the proof for sinh(x + y) = sinh(x)cosh(y)+cosh(x)sinh(y) and simply replaces y with -y. Thus using the definitions of sinh and cosh I show that cosh(-y) = cosh(y) and sinh(-y) = - sinh(y). Thus the only that changes when compared to the sinh(x+y) identity is we subtract instead of add the two terms together. This is a simple and quick derivation but shows the importance of building up previous work, so make sure to watch this video!
Download the notes in my video: https://1drv.ms/b/s!As32ynv0LoaIhvwoBncxK428IJFN0Q
View Video Notes on Steemit: https://steemit.com/mathematics/@mes/3xyhuv-video-notes-hyperbolic-trigonometric-identity-sinh-x-y
Related Videos:
Hyperbolic Trigonometric Identity: sinh(x+y): https://youtu.be/CtBzwqd4Rqc
Hyperbolic Trigonometric Identity: cosh(x-y): https://youtu.be/GMGaQTym4d4
Hyperbolic Trigonometric Identity: cosh(x+y): https://youtu.be/B_rfrnhx-t4
Hyperbolic Functions - tanh(x), sinh(x), cosh(x) - Introduction: http://youtu.be/EmJKuQBEdlc
Hyperbolic Trigonometry Identity Proof: sinh(-x) = -sinh(x), cosh(-x) = cosh(x): http://youtu.be/-Wqq4Wzi7O8 .
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https://www.youtube.com/watch?v=C1Vx3DaM0ig
In this video, I provide a quick review of the history behind Planck's Law, the formula derived by Max Planck in 1900 to resolve the Ultraviolet Catastrophe for blackbody radiation. The classical theory for blackbody radiation, proposed by John William Strutt (3rd Baron Rayleigh) and James Jeans, predicted that the energy emitted by a blackbody would increase without bound as the wavelength decreased, leading to a divergence at short wavelengths. This was wildly inaccurate, as experiments showed the energy spectrum peaks at a certain wavelength and then decreases at both higher and lower wavelengths.
Through a process of careful analysis, Max Planck derived a formula that matched experimental results by assuming that a hypothetical electrically charged oscillator in a cavity containing blackbody radiation can only emit energy in discrete quantities, or quanta. This was a significant departure from the previous theory of continuous energy intervals. Planck's revolutionary assumption of quantized energy emission pioneered the development of modern quantum mechanics.
Timestamps:
- Planck's Law describes spectral density of electromagnetic radiation of a black body at thermal equilibrium: 0:00
- 1900, Max Planck proved that a hypothetical electrically charged oscillator can only change its energy in increments: 0:51
- The Law: Spectral emissive power per unit area, per unit solid angle for particular radiation frequencies: 1:48
- Increasing temperature increases total radiated energy and peaks at shorter wavelengths: 2:21
- Planck's Law formula: 2:41
- Graph of Comparison between Planck's Law vs Classical Theory (Rayleigh-Jeans Law): 3:34
- Solid angle (units in steradians) is angle of projection for a specific area on the surface of a sphere: 4:16
- Solid angle is used to quantify amount of radiation projected from a heat source: 4:49
- Note that Wikipedia uses various versions of Planck's Law: 5:18
- Rayleigh-Jeans Law formula (classical theory): 5:34
- Rayleigh-Jeans Law formula in terms of frequency: 6:22
- Ultraviolet Catastrophe: Rayleigh Jeans-Law strongly disagrees at short wavelengths: 6:43
- Planck's Law formula as energy density: 7:17
- Planck's Law and Rayleigh-Jeans Law formulas (used in my Calculus book): 7:44
- Planck's Law and Rayleigh-Jeans Law formulas as energy density in terms of frequency: 8:32
Full video and playlists:
- Full video: https://youtu.be/oJpwidXu9Ps
- HIVE notes: https://peakd.com/hive-128780/@mes/applied-project-radiation-from-the-stars
- Sections playlist: https://www.youtube.com/playlist?list=PLai3U8-WIK0H9KtXz4yi98pGrnnbSSYUb
- Sequences and Series Playlist: https://www.youtube.com/playlist?list=PLai3U8-WIK0EXHAJ3vRg0T_kKEyPah1Lz .
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In this video I go over further into infinite sequences and series and this time go over the end-of-chapter Problems Plus section of advanced math questions. There are a total of 27 questions in this section: 1 example + 26 problems. These problems are more advanced than the typical questions in my calculus book and are a great way to test how well you know the concepts covered. Try to solve them yourself before watching the solution!
The topics covered in this video are listed below with their time stamps.
- Introduction - 0:00
- Problems Plus - 1:23
- Topics to Cover - 1:54
- Example - 2:29
- Problem 1 - 16:53
- Problem 2 - 23:58
- Problem 3 - 35:27
- Problem 4 - 1:05:21
- Problem 5 - 1:31:38
- Problem 6 - 2:03:57
- Problem 7 - 2:14:25
- Problem 8- 3:16:19
- Problem 9 - 3:44:25
- Problem 10 - 4:05:47
- Problem 11 - 4:21:35
- Problem 12 - 4:35:12
- Problem 13 - 4:56:02
- Problem 14 - 5:26:33
- Problem 15 - 5:38:41
- Problem 16 - 6:00:57
- Problem 17 - 6:16:06
- Problem 18 - 6:54:16
- Problem 19 - 7:23:42
- Problem 20 - 7:37:31
- Problem 21 - 8:04:29
- Problem 22 - 8:15:36
- Problem 23 - 8:39:05
- Problem 24 - 8:51:03
- Problem 25 - 9:43:11
- Problem 26 - 10:05:10
Download Video Notes: https://1drv.ms/b/s!As32ynv0LoaIiZg7o21H8ECtXaS0-Q?e=ib3eKY
View video notes on the Hive blockchain: https://peakd.com/hive-128780/@mes/infinite-sequences-and-series-problems-plus
Related Videos:
Sequences and Series Playlist: https://www.youtube.com/playlist?list=PLai3U8-WIK0EXHAJ3vRg0T_kKEyPah1Lz
Infinite Sequences and Series: Review and True-False Quiz: https://peakd.com/hive-128780/@mes/infinite-sequences-and-series-review-and-true-false-quiz .
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In this video I go over an example using the surface area formula for parametric curves, and this time use it to determine the surface area of a sphere with radius r. To do this I first visually show the parametric equations of a circle, and then form a sphere by rotating the top semi-circle about the x-axis. From here I show how we can write the symbolic representation to better memorize the surface area formula, and then after applying the formula, we can then integrate to get the surface area of a sphere, which is 4*pi*r^2. This is a very important video because it shows how we can use parametric curves and equations to determine the relatively famous equation for the surface of a sphere, which adds to the number of ways we can determine a formula. This is a good example in showing that the theorems we create are correct by using them to calculate famous equations, so make sure to watch this video!
Download the notes in my video: https://1drv.ms/b/s!As32ynv0LoaIhuYdoiatwFXg38JXNw
View Video Notes on Steemit: https://steemit.com/mathematics/@mes/parametric-calculus-surface-area-example-1-sphere
Related Videos:
Parametric Calculus: Surface Area Part 3: https://youtu.be/n9vxR0Of7qI
Parametric Calculus: Surface Area Part 2: https://youtu.be/Io3tiAUbjRE
Parametric Calculus: Surface Area Part 1: https://youtu.be/4bMEIf6WD8M
Parametric Calculus: Arc Length Part 1: https://youtu.be/AWvJDK-m6wQ
Parametric Calculus: Areas: https://youtu.be/XdplYV61xlM
Parametric Calculus: Tangents: https://youtu.be/deQwD2o0Sas
Parametric Equations and Curves: https://youtu.be/Kd3XF4LZoFE
Applications of Integrals: Arc Length Proof: https://youtu.be/2rb4H_rmgxg
Applications of Integrals: Surface Area: https://youtu.be/JkDPmAD37qk
Simple Proof of the Pythagorean Theorem: http://youtu.be/yt-EJlbJQp8 .
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https://www.youtube.com/watch?v=S0o4feoSp80
In this video I go over the proof for the trigonometric identity sin3x = 3sinx - 4sin^3(x). This proof uses the summation identity sin(x+y) multiple times, as well as several other identities, to simplify the angle from 3x to just x. I will be using this trig identity in later videos, so it is better to solve this separately in this video. This is a very useful video in arranging trig equations and identities in an effective problem solving way, which is useful to know for any general mathematical proof; so make sure to watch this video!
Download the notes in my video: https://1drv.ms/b/s!As32ynv0LoaIhuEOqSFuescqzEHK6Q
View Video Notes on Steemit: https://steemit.com/mathematics/@mes/trigonometry-identity-sin3x-3sinx-4sin-3-x
Related Videos:
Trigonometry Identities: Proof that sin^2(x) + cos^2(x) = 1: http://youtu.be/o-fAx_96lgw
Trigonometry Identities: cos(x +/- y) = cos(x)cos(y) -/+ sin(x)sin(y) : http://youtu.be/VuQczhk7HOs
Trigonometry Identities: sin(x +/- y) = sin(x)cos(y) +/- cos(x)sin(y): http://youtu.be/edtk9thfwbM .
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https://www.youtube.com/watch?v=gsLYuQvdnDg
In this video I go over another example on finding the volume of a shape using integrals. This example involves finding the volume formed by rotating the region between the functions y = x and y = x^2 about the x-axis. The volume formed by rotating this region is a walled cylinder with a varying wall thickness.
Download the notes in my video: http://1drv.ms/1BbYxvr
View Video Notes on Steemit: https://steemit.com/mathematics/@mes/integrals-and-volumes-example-4-walled-cylinder-volume
Related Videos:
Integrals and Volumes: Example 3 Rotate about y-axis: http://youtu.be/a0xgMPJfAe8
Integrals and Volumes: Example 2: http://youtu.be/I6EDCqayvBY
Integrals and Volumes: Example 1 Volume of a Sphere: http://youtu.be/DAnLdsanyyQ
Integrals and Volumes: http://youtu.be/-evdvkDwBuQ
Integrals and Areas Between Curves: http://youtu.be/2F03KMLIzbk
Area Under a Curve: Introduction to Integral Calculus: http://youtu.be/JbEbhv8ybmE
The Definite Integral - Brief Introduction: http://youtu.be/vhMP5SKbQjU
Fundamental Theorem of Calculus - Introduction and Part 1 of the Theorem: http://youtu.be/3o8Q6UJzJyk
Fundamental Theorem of Calculus - Proof of Part 1 of the Theorem: http://youtu.be/CAqTwiPxYwU .
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https://www.youtube.com/watch?v=8OL6-k2Xw04