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

Introduction to the cross product

Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/dot_cross_products/v/proof-relationship-between-cross-product-and-sin-of-angle?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra

Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/dot_cross_products/v/defining-a-plane-in-r3-with-a-point-and-normal-vector?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

Creating scaling and reflection transformation matrices (which are diagonal)

Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/matrix_transformations/lin_trans_examples/v/linear-transformation-examples-rotations-in-r2?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra

Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/matrix_transformations/linear_transformations/v/more-on-matrix-addition-and-scalar-multiplication?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

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


Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits.

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 Differential Calculus channel:
https://www.youtube.com/channe....l/UCNLzjGl1HBdZrHXo4
Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/geometry/xff63fac

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra2/conics_precalc/circles-tutorial-precalc/e/equation_of_a_circle_2?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Watch the next lesson: https://www.khanacademy.org/math/algebra2/conics_precalc/ellipses-precalc/v/conic-sections-intro-to-ellipses?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Missed the previous lesson?
https://www.khanacademy.org/math/algebra2/conics_precalc/circles-tutorial-precalc/v/radius-and-center-for-a-circle-equation-in-standard-form?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!

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 Algebra II channel:
https://www.youtube.com/channe....l/UCsCA3_VozRtgUT7wW
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Join Caroline and Sophie as they celebrate National Reading Month and their love of reading. In this Circle Time, our hosts share their three favorite read-aloud episodes which include Old Friends New Friends, A Helping Hand, and Flower Friends—all written by Cynthia Platt. Tune in and listen to these three sweet stories about friendship and then continue the reading journey by finding these stories in the Khan Kids app.

Learn more about Khan Academy Kids, our free educational app for children ages 2-8, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Remember to subscribe to Circle Time to be reminded of our new shows!

You can also access all of our Circle Time videos on our Circle Time Playlist, here: http://khan.co/KhanKids-CircleTimePlaylist.

Questions? Reach our team at khankids@khanacademy.org.

The word "are" is spelled a-r-e. The word "are" is a form of the word "be," which can describe the quality of a person, place, or thing. These apples are tasty!

Learn the sight word "are" with the Khan Academy Kids characters. The fun example, easy-to-remember definition, and cute illustrations will help kids remember the word any time they come across it.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
➡️ http://khan.co/KhanKids-YT-Apple
➡️ http://khan.co/KhanKids-YT-Amazon

You can also access other sight words videos on our Sight Words playlist here: http://khan.co/KhanKids-SightWords.

Subscribe to our channel for more videos like this.

Play Iron Order for FREE on PC or Mobile 💥 https://play.ironorder1919.com/ULF0/SimpleHistory
Receive an Amazing New Player Pack, only available for the next 30 days! Thanks to Iron Order for sponsoring

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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Conan White
Narrator:

Chris Kane
https://vocalforge.com/

Sources:
Mark V Tank
By David Fletcher

Tanks: An Illustrated History of Their Impact
By Spencer Tucker

British Battle Tanks: World War I to 1939
By David Fletcher

Tank Hunter: World War One Craig Moore

Thanks to Established Titles for sponsoring this video! Get 10% off on any purchase with code SimpleHistory. Go to https://establishedtitles.com/SimpleHistory and help support the channel!


Everyone is familiar with the Hollywood version of medieval jousts. The handsome knight galloping towards his sworn enemy, lance steady and stern, while his lady’s handkerchief gently sits next to his heart. But have you ever seen a joust that used boats instead of horses? Knights who practised hitting targets hung from masts in rivers instead of in training grounds? Watch how even some of the painted Maya, viking raiders or pious monks staved off their boredom. Through some truly odd ball games, they might leave you baffled and confused, and yet still have a part of you wanting to try them out yourself

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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Natasha Martell
Narrator:

Chris Kane
https://vocalforge.com/

Sources

Barber, Richard, and Juliet Barker. Tournaments: Jousts, Chivalry and Pageants in the Middle Ages. New York: Weidenfeld & Nicolson, 1989.
Brand, Jonathan. “Jeu de Paume: Holding Court in Paris”. Smithsonian Magazine, May 18th 2010.
Coss, Peter, and Maurice Keen. Heraldry, Pageantry and Social Display in Medieval England. Gateshead: Athenæum Press Ltd, 2003.
Cummins, John. The Hound and the Hawk: The Art of Medieval Hunting. New York: St Martin’s Press, 1988.
Cybulskie, Danièle. “Sports in Medieval London”. Accessed 7 June 2022.
Davies, Diane. “Ballgame – Pok-ta-Pok”. Accessed 7 June 2022.
Gillmeister, Heiner. Tennis: A Cultural History. Bristol: Equinox Publishing, 2017.
Gogosz Remigiusz. “Horse Fights: The Brutal Entertainment of the Icelanders in the Middle Ages”, Średniowiecze Polski i Powszechne (2014) pp. 17-32.
Henricks, Thomas S. “Sport and Social Hierarchy in Medieval England”, Journal of Sport History, Vol. 9, No.2 (1982) pp. 20-37.
Hjaltialin, Jon A. “On the Cvilisation of the First Iceleandic Colonists, with a Short Account of Some of Their Manners and Customs”, Transactions of the Ethnological Society of London, Vol. 6 (1868) pp. 176-182.
Kowaleski, Maryanne. “Medieval Towns: A Reader” (22 August, 2008).
Oggins, Robin S. The Kings and Their Hawks: Falconry in Medieval England. New Haven: Yale University Press, 2004.
Pattie, Tammy. “Medieval Games and Recreation”, Eastern Illinois University, (2011) pdf.
Scarborough, Vernon L. The Mesoamerican ballgame. Tucson : University of Arizona Press, 1991. Archive.org.
Thurber, B. A. “The Viking Ball Game”, Scandinavian Studies, volume 87, No.2 (2015) pp. 167-188.

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Were 187,000 soldiers taken off the frontline to play extras in a Nazi movie in the late parts of World War II?


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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Conan White
Narrator:

Chris Kane
https://vocalforge.com/

Sources:
Selling Hitler by Nicholas O’Shaughnessy
A Critical History of German Film by Stephen Brockmann
Nazi Propaganda Films by Rolf Giesen
World on Film by Martha P Nochimson

👟 Vessis early Black Friday sale is on now! Vessi is giving away a pair of socks of your choice to the first 100 shoes sold using my code SOCKSSIMPLEHISTORY. Get your style and size you want now before they sell out! Check out their Early Black Friday sale at https://vessi.com/SIMPLEHISTORY
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You may have heard of people dancing to death, laughing to death or sitting on a throne to death, but there are many more surprising stories told to the Grim Reaper when the scythe is resting by the door.
What follows are what happens when you really want to stick it to your enemies for slowing your conquest of the Mediterranean, the consequences of leaving a nuclear reactor to inexperienced workers, the measures people will go to when they’re furious and hungry, and an unfortunate incident relating with an elephant-sized general.

2nd Channel: https://www.youtube.com/channe....l/UCPdc6bs3I8s6Y4QE_
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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script:
Natasha Martell



American Battlefield Trust. n.d. “John Sedgwick.”

BBC News. “Segway boss died in 'act of courtesy,” July 15, 2011. BBC.

Bradley, James. “Flyboys: A True Story of Courage.” Boston: Little Brown, (2003).

Crowley, Roger. “Bragadin’s Defense,” April 19, 2018. HistoryNet.

Crowley, Roger. “Empires of the Sea.” New York: Random House, 2008.

History.com Editors. “Dancer Isadora Duncan is killed in car accident.” Last modified September 11, 2019. History.

Idaho National Laboratory. n.d. “SL-1, Idaho: Just The Facts.”

Naki, Emrah. “Conquest of Cyprus by the Turks: Divergence of the Early Modern Period and Establishment of Status Quo in the Mediterranean.” Gazi Akademik Bakış (November 19, 2019): 1-16.

Spokane Daily Chronicle. “3 Die in Reactor Blast,” 75th Year, No. 91, January 4, 1961.

The Spokesman Review. “3 Technicians Die in Reactor Blast,” 78th Year, No. 236, January 5, 1961.

T. McMahon, Martin. “THE DEATH OF GENERAL JOHN SEDGWICK.” In Battles and Leaders of the Civil War: Being for the Most Part Contributions by Union and Confederate Officers. New York: The Century Co., 1884.

United States Atomic Energy Commission. “IDO-19311 Final Report of SL-1 Recovery Operation.” Idaho Falls: General Electric Corporation, 1962.

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Credit:
Created by Daniel Turner

Narrator:

Chris Kane
www.vocalforge.com


Music Credit
Eyes of Glory

Faction: The Canadian Army

The First World War

In 1914 Canada had just 3000 regular soldiers but with an expectant war in Europe the government asked for volunteers to join a Canadian Expeditionary Force (CEF).

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Credit:

Narrator:

Chris Kane

https://ckvox.com/

Animation:
Daniel Turner

Artwork:
Daniel turner

Weapons research :
Mike Edge

Music Credit

Ross Bugden- 'Drive'

‘Creative Commons Attribution 4.0 International License’.
Pictures: Wikimedia Commons (Public Domain)

This video provides a basic introduction into the top 10 most important formulas used in excel. These include the average function, autosum, Sum If, Count, Counta, Count If function, Concantenate, If logical function, Vlookup, and Drop Down Lists.

Excel Tutorial For Beginners:
https://www.youtube.com/watch?v=nK-uNYuvcag

Top 30 Excel Tips & Shortcuts:
https://www.youtube.com/watch?v=UMad9_-4rOU

_________________________________________
Excel - Statistics - Mean, Median, Mode:
https://www.youtube.com/watch?v=aRR86imVsxM

Excel Scatter Charts:
https://www.youtube.com/watch?v=hwqq0HYrers

Excel - Finding Slope & Y-Intercept:
https://www.youtube.com/watch?v=KwQsV77bYDY

Solving Polynomial Equations - Goal Seek:
https://www.youtube.com/watch?v=lomAl6XB_SM

__________________________________________
How To Calculate Loan Payments In Excel:
https://www.youtube.com/watch?v=ifbNN2SoKlk

How To Create an Amortization Table:
https://www.youtube.com/watch?v=QZfMW203v4U

How To Look Up Customer Data In Excel:
https://www.youtube.com/watch?v=HDda6ny40ZM

How To Create a Data Entry Form In Excel:
https://www.youtube.com/watch?v=_tZLGBgQCYo

_________________________________________
YouTube Channel Growth Accelerator:
https://vimeo.com/ondemand/youtubeaccelerator

Algebra For Beginners:
https://www.video-tutor.net/al....gebra-for-beginners-

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

Full-Length Math & Science Videos:
https://www.patreon.com/mathsc....iencetutor/collectio

This electronics video tutorial discusses how resistors, capacitors, and inductors can be used to filter out signals according to their frequency. This video include examples such as RC low pass filters, RL low pass filters, RC high pass filters, and RL low pass filters. It provides the formulas to calculate the cut-off frequency and it discusses the voltage gain and frequency response of each circuit.

What Is a Diode?
https://www.youtube.com/watch?v=g54vURe47gM

Light Emitting Diodes:
https://www.youtube.com/watch?v=Hl4v1aUFWrs

Zener Diodes:
https://www.youtube.com/watch?v=mmiHX_IzvDw

Varactor Diodes - Voltage Capacitors:
https://www.youtube.com/watch?v=aXuM3eW1fcQ

Generate Electricity With Crystals!
https://www.youtube.com/watch?v=dO8zsgbunvY

Boost Converter DC to DC Circuit:
https://www.youtube.com/watch?v=9QM55r5fnUk

________________________________
Simple Voltage Booster Circuit:
https://www.youtube.com/watch?v=2-JH80yq--s

100,000V High Voltage Voltmeter:
https://www.youtube.com/watch?v=GyWy4Ju26pw

Buck Converter Circuit:
https://www.youtube.com/watch?v=rfChSvb8FX0

RC Band Pass Filters:
https://www.youtube.com/watch?v=ENy_zg9dX5c

RLC Band Stop and Band Pass Filters:
https://www.youtube.com/watch?v=ynIx3vNvdIM

______________________________
NPN and PNP Transistors:
https://www.youtube.com/watch?v=AcxDiesy-nI

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

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

This organic chemistry video tutorial discusses shielding and deshielding as it relates to H-NMR spectroscopy. A hydrogen nucleus is said to be shielded from an external magnetic field if it is an electron rich environment. It will thus appear upfield in the NMR spectrum. Protons adjacent to electron withdrawing group are said to be deshielded and appear downfield in a NMR spectrum.

Alcohol Reactions - HBr, PBr3, & SOCl2:
https://www.youtube.com/watch?v=4PDs3ygNsv4

Free Radical Reactions:
https://www.youtube.com/watch?v=w9RAULFkqKQ

Reactions Summary:
https://www.youtube.com/watch?v=nkh0egRNQz0

Organic Chemistry 1 Final Exam Review:
https://www.youtube.com/watch?v=ej2pSWw6U3w

IR Spectroscopy:
https://www.youtube.com/watch?v=WTmj_9VT5oE

Mass Spectrometry:
https://www.youtube.com/watch?v=VUIPYnWLSDE

______________________________
Proton NMR Spectroscopy:
https://www.youtube.com/watch?v=vejKDb1dBn8

Carbon-13 NMR Spectroscopy:
https://www.youtube.com/watch?v=QUVTATcXE9Y

Ethers and Epoxides:
https://www.youtube.com/watch?v=BxRLJhHjqMc

Diels Alder Reaction:
https://www.youtube.com/watch?v=sBmoP6KwK-8

Organic Chemistry 2 Final Exam Review:
https://www.youtube.com/watch?v=T5NaUdVfAOc

This chemistry video tutorial explains how to solve ideal gas law problems using the formula PV=nRT. This video contains plenty of examples and practice problems.

Pressure & Boiling Point: https://www.youtube.com/watch?v=6t50Gmo8tq0

Gas Pressure Unit Conversion:
https://www.youtube.com/watch?v=JNOg1OsxMUw

Manometers & Barometers:
https://www.youtube.com/watch?v=8P5NlpxGT7Y

Water Height & Mercury Column:
https://www.youtube.com/watch?v=C6iFuluQvJk

Boyle's Law Practice Problems:
https://www.youtube.com/watch?v=v8r_AU_TlPg

_________________________________
How Does a Bike Pump Work?
https://www.youtube.com/watch?v=I0b_i6-HLBA

Charles Law:
https://www.youtube.com/watch?v=uZ2d79NFx2w

Gay Lussac's Law:
https://www.youtube.com/watch?v=RszgzH_2A9k

Avogadro's Law:
https://www.youtube.com/watch?v=Czo2rIai5u0

Ideal Gas Law Problems:
https://www.youtube.com/watch?v=iaZ96KaQ44c

Combined Gas Law Problems:
https://www.youtube.com/watch?v=pFaYMR2UAGE

_______________________________
Gas Stoichiometry Problems:
https://www.youtube.com/watch?v=hPY7d6GUEV0

Molar Mass of a Gas at STP:
https://www.youtube.com/watch?v=XTiR7F6FzNc

Gas Density at STP:
https://www.youtube.com/watch?v=p8Mqx6CrDis

Dalton's Law of Partial Pressure:
https://www.youtube.com/watch?v=J7YRwU7IV8Q

Collecting Gas Over Water:
https://www.youtube.com/watch?v=1obOU5CxoQ4

_______________________________
Gas Density of Mixtures:
https://www.youtube.com/watch?v=OOD4Wg_TwX4

Average Kinetic Energy of a Gas:
https://www.youtube.com/watch?v=drZe2cCu-mc

Graham's Law of Effusion:
https://www.youtube.com/watch?v=urJI2RHZ42k

Kinetic Molecular Theory of Gases:
https://www.youtube.com/watch?v=iAsP-9m2aH0

Gas Law Problems Review:
https://www.youtube.com/watch?v=2ZtLDXF1V6w

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

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

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Hi, this is Kids Academy and in our new video for kids, you can learn english ABC alphabet.
The alphabet is a building block that helps kids to develop reading and writing skills.

Try Kids Academy now! Enjoy our special Cyber Week offer. The price was 75% higher! https://www.kidsacademy.mobi/s....ubscription-plan/cyb

There is some debate which should be taught first – UPPERCASE letters of lowercase letters. On the one hand, uppercase letters are easier to identify and draw. On the other hand, most of what is written is in lowercase.
Whichever order you choose, we have prepared this entertaining video for teaching uppercase letters. Cute animals, natural phenomena and your kids’ favorite foods will introduce letters to your little ones and help them learn their ABCs.

00:00 - Start
00:16 - Letter A
00:30 - Letter B
00:48 - Letter C
01:03 - Letter D
01:20 - Letter E
01:42 - Letter F
01:56 - Letter G
02:08 - Letter H
02:21 - Letter I
02:44 - Letter J
02:58 - Letter K
03:13 - Letter L
03:39 - Letter M
03:54 - Letter N
04:14 - Letter O
04:29 - Letter P
04:47 - Letter Q
05:04 - Letter R
05:19 - Letter S
05:39 - Letter T
05:56 - Letter U
06:09 - Letter V
06:24 - Letter W
06:39 - Letter X
06:53 - Letter Y
07:05 - Letter Z

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#kidsacademy #LearnWithKidsAcademy #learnabc #abcalphabet #videoforkids

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Welcome our new video about easy and fun science experiments for kids.

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

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📍📍歡迎收看《English Speaking系列》📍📍
Talking about different festivals
👉https://youtu.be/7XWE_QB0qEk
Introduce your school
👉https://www.youtube.com/watch?v=DPfvjdEI7Dw
Back to school
👉https://www.youtube.com/watch?v=NSv5QyPmhpw
Good manners_actions
👉https://youtu.be/_Swu0JtZke0
Good manners
👉https://www.youtube.com/watch?v=HGME2UCt6-M&t=29s
Talking about daily routines
👉https://youtu.be/Np8mJ1uw8c8

📍📍歡迎收看《Grammar系列》📍📍
Lesson4_common mistakes
👉https://youtu.be/A7Yz6eEcYPs
Lesson3_irregular verbs_part2
👉https://youtu.be/vE6AnyrYDZQ
Lesson2_irregular verbs_part 1
👉https://youtu.be/C_p_r053MeQ
Lesson1_Opposite words
👉https://youtu.be/ftz3u46E0Zo

📍📍歡迎收看《Cooking系列》📍📍
Make fresh juice
👉https://www.youtube.com/watch?v=VFOo2RW_qoI

📍📍歡迎收看《Shorts系列》📍📍
Funny jokes 3
👉https://youtube.com/shorts/VJe4DCE9lLs
Funny joke 2
👉https://youtube.com/shorts/2ouEf37QtdQ
Funny joke 1
👉https://youtube.com/shorts/OJ2-YEfl2uw
Tongue twister_birdie vs turdie vs pie
👉https://youtube.com/shorts/yvOv4EVm6Xc
Tongue twister_scream vs ice cream
👉https://youtube.com/shorts/KBi79AOOPow
Tongue twister_fuzzy vs wuzzy
👉https://youtube.com/shorts/pwGPW_cWdxc
Tongue twister_whether vs weather
👉https://youtube.com/shorts/_3yjqCC4ASA
Read with me_Irregular verbs Part A
👉https://youtube.com/shorts/OfA0FlrxVy8
Read with me_Irregular verbs Part B
👉https://youtube.com/shorts/GV9iXpKMUAk

📍📍歡迎收看《Fun Games系列》📍📍
Make a guess
👉https://youtu.be/J0E2LF9_chU
Quiz Time
👉https://youtu.be/M4JrGzedjH0
Quiz Time
👉https://youtu.be/k7cTb77sh1Q
Quiz Time
👉https://www.youtube.com/watch?v=QGwhG4Mk_Ow&t=5s
Quiz Time
👉https://www.youtube.com/watch?v=xDUJPNRh3mA


📍📍歡迎收看《Basic conversation系列》📍📍
Basic conversation Lesson 8_Talking about your best friend
👉https://youtu.be/NknxeVxhP7A
Basic conversation Fun Lesson_Different languages
👉https://youtu.be/mCJPRD7pahw
Basic conversation Lesson 7_Apply for a library card and borrow books
👉https://www.youtube.com/watch?v=5XCmL9clkQY
Basic conversation Lesson 6_Ordering food
👉https://youtu.be/xaJKiHn6vuc
Basic conversation Lesson 5_Visiting friends
👉https://youtu.be/5TkeC8iirVA
Basic conversation Lesson 4_Making phone calls
👉https://youtu.be/B2CUxLSK5CU
Basic conversation Lesson 3_Types of weather
👉https://youtu.be/ivyo-t50qnw
Basic conversation Lesson 2_Days in a week
👉https://youtu.be/fAtrVak5qLo
Basic conversation Lesson 1_Greetings
👉https://youtu.be/hl_foOF6EjY

📍📍歡迎收看其他《Vocabulary詞匯系列》📍📍
Animals on land_陸地動物
👉https://youtu.be/XxZXjGkJkCQ
Animals in the sea_海洋動物
👉https://youtu.be/gN7GsS6cCeg
Parts of the body_身體部份名稱
👉https://youtu.be/GviCG650sng
Theme Park facilities_主題公園設施
👉https://youtu.be/RiP4etv1ANs
Famous Landmarks_國家名勝地標名稱
👉https://youtu.be/-_rRauEiDic
Colour_顏色
👉Part 2https://youtu.be/78xUTO1My_E
Furniture in the living room_客廳內傢俱名稱
👉https://www.youtube.com/watch?v=smN7hHwHL1g
2D shapes_平面形狀的名稱
👉https://www.youtube.com/watch?v=P4wT5wmqIRY
Jobs_職業名稱
👉https://www.youtube.com/watch?v=NYDTE...
Hairstyle_不同髮型的英文名稱
👉https://www.youtube.com/watch?v=PU_BB2Kvj_w
Solar System_太陽系
👉https://www.youtube.com/watch?v=Qwwczge-_ks
Tableware_餐具名稱
👉https://www.youtube.com/watch?v=rm4FNlRQZxE
Hats_帽子的名稱
👉https://www.youtube.com/watch?v=Pl3g8JgXeGc
Egg_蛋的不同煮法名稱
👉https://www.youtube.com/watch?v=alwVK7zoplc
National Flags_國家及國旗
👉https://youtu.be/tBwHd6XHfE0
The 12 Chinese Zodiac_12生肖
👉https://youtu.be/ii8djvnF-pk
Fruit_水果名稱
👉https://youtu.be/ozwI9sk-bo4
Stationery_文具名稱
👉https://youtu.be/jsjwHTaWfkg
Colour_顏色 Part 1
👉https://youtu.be/AiiGKUEuWx4

📍📍歡迎收看《停課不停學系列》 📍📍
Number 1-10
👉https://youtu.be/wVn_0fY5i1o
Fruit
👉https://youtu.be/C3jy63nGhgA
Transportation in HK
👉https://youtu.be/5qQX0ymwwqo
Vegetables
👉https://m.youtube.com/watch?v=iu1OnlmqRI4
Sports
👉https://youtu.be/eF_Dv6owlM8
Relaxing activities
👉https://www.youtube.com/watch?v=ROv7OlyXe0A

📍📍歡迎收看《Writing a composition系列》 📍📍
👉School Picnic Day
https://youtu.be/GNXyS84JrQo
At the beach
👉https://www.youtube.com/watch?v=WcERiNMpb9s

📍📍歡迎收看《小一叩門面試》系列 📍📍
👉School Interview_Part 1:Talking about yourself
https://www.youtube.com/watch?v=wWTwr2o4_uo
👉小一叩門：不能不看題目背後的真正意義
https://m.youtube.com/watch?v=msqXn02v8tw
👉小一叩門：面試陷阱
https://m.youtube.com/watch?v=OrTx4B_cnkw

英語版本：
Judy and Mr Elephant | Story Telling | https://youtu.be/hj69S_MwU-w
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Please subscribe our channel.
To accelerate your learning, join our patreon @learnfast101 now.
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請訂閱我們的頻道、點讚、分享，鼓勵我們分享更多有用又有趣的知識。
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Welcome to watch our videos
歡迎觀看我們所創作的的其他影片
1）Basic Conversation 會話
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

2) Grammar 語法
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

3）English Speaking
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

4）Funny Jokes 笑話
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

5）Vocabulary 詞彙
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

6）English Idioms 英語成語
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

7）Revision Exercise 重温練習
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

8）Fun Games 趣遊戲味
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

9） Tongue Twister 繞口令
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

10）Writing a composition 作文
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

Volume of Geometric Shapes
How to use the volume sphere formula in order to calculate the volume.

The formula for the volume of a sphere is 4/3 pi times the radius squared.
The radius of a sphere is half of the diameter.
In this example, I use 3.14 for pi which is the ratio of circumference to the diameter of a circle.

In example two you will use diameter to calculate the volume.

Check out: Surface Area Sphere Demo. I show why the surface area of a sphere is equal to a 4 to 1 ratio to the surface area of the hemisphere of the sphere
.https://www.youtube.com/watch?v=xDXdPB7SbMg

How to use the Pythagorean Theorem to find the hypotenuse or a leg length.
Learn how to use the Pythagorean theorem. The Pythagorean theorem expresses the relation among the three sides of a right triangle. A right triangle is a triangle with one angle of 90 degrees. This theorem can be used to calculate the missing length of a right triangle. The Pythagorean theorem states that the square of the hypotenuse is equal to the sum of the squares of the two sides equals the square of the hypotenuse. The hypotenuse is the side opposite the right angle.

Example problems
Calculate the hypotenuse of a right triangle given the side lengths.

Calculate the length of the missing side.

Additional Resources
https://www.youtube.com/watch?v=yWwEGZZ8zwA
The Pythagorean theorem
http://www.montereyinstitute.o....rg/courses/Developme

Skittles demonstration of the Pythagorean theorem
https://youtu.be/pItvzCGjZJY