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Multiplying a vector by a scalar | Vectors and spaces | Linear Algebra | Khan Academy Teacherflix 52 Views • 2 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/e/scaling_vectors?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra

Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/v/linear-algebra-vector-examples?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra

Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/v/adding-vectors?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra

Linear Algebra on Khan Academy: Have you ever wondered what the difference is between speed and velocity? Ever try to visualize in four dimensions or six or seven? Linear algebra describes things in two dimensions, but many of the concepts can be extended into three, four or more. Linear algebra implies two dimensional reasoning, however, the concepts covered in linear algebra provide the basis for multi-dimensional representations of mathematical reasoning. Matrices, vectors, vector spaces, transformations, eigenvectors/values all help us to visualize and understand multi dimensional concepts. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy’s Linear Algebra channel:: https://www.youtube.com/channe....l/UCGYSKl6e3HM0PP7QR
Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us

Photoelectric Effect, Work Function, Threshold Frequency, Wavelength, Speed & Kinetic Energy, El Teacherflix 64 Views • 2 years ago

This chemistry video tutorial explains how the photoelectric effect works. It also explains how to use the work function of metals to calculate the threshold frequency and maximum wavelength of light necessary to eject an electron off the surface of an active metal. In addition, it explains how to calculate the speed of an electron as well as the kinetic energy of an electron in electron volts. You need to know how to convert electron volts to joules and vice versa. This video provides all of the formulas and equations needed including plenty of practice problems and examples.

Speed of Light, Frequency, Wavelength:
https://www.youtube.com/watch?v=LgYMxH1LCdo

Photon Energy:
https://www.youtube.com/watch?v=PYNSopwd1l4

The Photoelectric Effect:
https://www.youtube.com/watch?v=-LECEvusk8E

De Broglie Wavelength:
https://www.youtube.com/watch?v=cYyFPFU6s_A

The Bohr Model of Hydrogen:
https://www.youtube.com/watch?v=mXxsT1ut35Q

Heisenberg's Uncertainty Principle:
https://www.youtube.com/watch?v=BNYz5EKXVeI

________________________________
Intro to Quantum Numbers:
https://www.youtube.com/watch?v=eRIN9CPDrpo

Orbitals & Atomic Energy Levels:
https://www.youtube.com/watch?v=4sLXUr2HWIs

Maximum Number of Electrons:
https://www.youtube.com/watch?v=UNE-7AuiMGs

Intro to Electron Configuration:
https://www.youtube.com/watch?v=NIwcDnFjj98

Electron Configuration Exceptions:
https://www.youtube.com/watch?v=Ur2PuzJ7KWs

Noble Gas Notation:
https://www.youtube.com/watch?v=6MAKMnZdfbs

Electron Configuration of Ions:
https://www.youtube.com/watch?v=nlZa8lN_-Ds

_______________________________
Orbital Diagrams:
https://www.youtube.com/watch?v=6dRdMy9tgzE

Paired & Unpaired Electrons:
https://www.youtube.com/watch?v=xwWJf48yfNs

Aufbau's Principle & Hund's Rule:
https://www.youtube.com/watch?v=C6afrc1QS6Y

Paramagnetic & Diamagnetic Elements:
https://www.youtube.com/watch?v=SO983iq9GaI

Valence Electrons & Periodic Table:
https://www.youtube.com/watch?v=FPk2ziB9iX0

Effective Nuclear Charge:
https://www.youtube.com/watch?v=JDsMR1bHGO4

_________________________________
Slater's Rule:
https://www.youtube.com/watch?v=TaYUOiEe6OA

How To Identify The Element:
https://www.youtube.com/watch?v=4qwJIJUaIeQ

Quantum Numbers - Mega Review:
https://www.youtube.com/watch?v=lPptuKlCM6k

Quantum Numbers - Practice Test:
https://www.youtube.com/watch?v=E-nOH18dF-c

Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio

Evolution of the Indo-European Languages - Ancient Civilizations DOCUMENTARY Teacherflix 224 Views • 2 years ago

This video is brought to you by Aloud. Learn more about the video translation tool that’s breaking the language barrier: https://aloud.area120.google.com/?utm_source=youtube&utm_medium=creator&utm_campaign=kg

The Kings and Generals animated historical documentary series on the ancient civilizations continues with a video on the evolution of the Indo-European Languages, as we give a summary of how this language family formed and how the languages belonging to each are still connected to each other:

Arabia Before Islam: Religion, Society, Culture: https://youtu.be/07OsSSt0ytc
Vandals: https://youtu.be/-IpbeEW6I9Y
How Rome Conquered Greece: https://youtu.be/v5q1rerf-qw
Did the Trojan War Really Happen: https://youtu.be/12eHJL2yRtk
Demosthenes: https://youtu.be/ABS1iepXG0U
Ancient Greek Politics and Diplomacy: https://youtu.be/MVnp4NilDLI
Pyrrhic Wars: https://youtu.be/2QBA6ZPmj3Q
Ancient Macedonia before Alexander the Great and Philip II: https://youtu.be/FXX1FVYysjQ
Diplomatic Genius of Philip of Macedon: https://youtu.be/yVTrkESkuTw
Etruscans: https://youtu.be/FkySjRwUteE
Bosporan Kingdom: https://youtu.be/ltikjXUiAC4
Ancient Greek State in Bactria: https://youtu.be/IQATsepKoLE
The Greco-Chinese War Over the Heavenly Horses: https://youtu.be/g6Rphg_lwwM
Ancient Greek Kingdom in India: https://youtu.be/ZxJk4KHZxi8
Ghaznavids: https://youtu.be/yJ91rv0xdWM
Huns: https://youtu.be/bFpQjWtpHcM
White Huns: https://youtu.be/JJWddbCUZLQ
Gokturks: https://youtu.be/BChpoa_IuQs

Yuezhi: https://youtu.be/2KdM6AlyLUY
Seljuks: https://youtu.be/P79ECnISamo

Support us on Patreon: http://www.patreon.com/KingsandGenerals or Paypal: http://paypal.me/kingsandgenerals or by joining the youtube membership: https://www.youtube.com/channe....l/UCMmaBzfCCwZ2KqaBJ We are grateful to our patrons and sponsors, who made this video possible: https://docs.google.com/docume....nt/d/1ooKPbpq0z8ciEj

The video was made by Arb Paninken, while the script was developed by Georgi Kolev. This video was narrated by Officially Devin (https://www.youtube.com/channe....l/UCU0-VII-V376zFxiR & https://www.youtube.com/channe....l/UC79s7EdN9uXX77-Ly

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Production Music courtesy of Epidemic Sound: http://www.epidemicsound.com

#Documentary #DubbedWithAloud #Civilization

Your Community | Types of Community - Social Studies for Kids | Kids Academy Teacherflix 155 Views • 2 years ago

Thousands of parents and educators are turning to the kids’ learning app that makes real learning truly fun. Try Kids Academy with
3-day FREE TRIAL! https://bit.ly/2GuGyL2

Your Community | Types of Community | Kids Academy

Your Community | Types of Community | Kids Academy
Does your kid know about the community? Do you know how to explain it to them? Well, don’t worry this tutorial will help you explain the concept of community to your kid in simple and easy words.

What is a community?

A community is a place where people live together. They interact with each other and live by knowing each other. It is very important for the kid to understand the importance of living in a community and what is the actual meaning of living in a community.

Types of communities

There are many different types of communities. In this lesson, we will cover the three most common types.

1. Urban
2. Suburban
3. Rural

Urban community

An urban community is large and highly populated. This means that a big number of people live there. Tall buildings, skyscrapers, heavy traffic, and transportation are key identification of an urban community. For example, New York City is an urban community. In urban communities, you will find everyone busy with their tasks, with heavy traffic and a lot of hustle and bustle. That is why New York is called the city that never sleeps.

It remains busy all day and all night. Most people living in apartment buildings while very few live in homes. You will see a lot of apartments and homes packed with each other due to the high population.

Suburban community

A suburban community is located near a city but not as populated as an urban community. There are less traffic and smaller buildings. Some people travel to the nearby urban for work, which is called commuting. Many people live in homes which are very beautifully made. They have amenities such as large backyards and garages.

Rural community

A rural community has very few people and buildings. It mainly consists of farmland. There is more nature in the rural community, you will see animals, trees, grassy lands, and pure water. people live in small houses that are spaced far apart even miles away. It has a very peaceful environment with no honking and people rushing and heavy traffic.

So, this was a small lesson on communities. In which community would you like to live?

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#TalentedAndGifted #LearnWithKidsAcademy

Kids Academy Talented and Gifted Program for kids aged 2-10:

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Plotting complex numbers on the complex plane | Precalculus | Khan Academy Teacherflix 72 Views • 2 years ago

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra2/x2ec2f6f

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/e/the_complex_plane?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Watch the next lesson: https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/v/complex-number-addition?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/v/complex-number-intro?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Precalculus on Khan Academy: You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn't mean anything unless you have some knowledge of what calculus is. Let's keep it simple, shall we? Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra. Therefore....precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others. There you have it ladies and gentlemen....an introduction to precalculus!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Precalculus channel:
https://www.youtube.com/channe....l/UCBeHztHRWuVvnlwm2
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us