Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/sc....ience/biology/cellul

Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction.

Watch the next lesson: https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/overview-of-cellular-respiration-steps/v/overview-of-cellular-respiration?utm_source=YT&utm_medium=Desc&utm_campaign=biology

Missed the previous lesson? https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/v/oxidation-and-reduction-from-biological-view?utm_source=YT&utm_medium=Desc&utm_campaign=biology

Biology on Khan Academy: Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascinating and intricate systems that make life possible. Dive in to learn more about the many branches of biology and why they are exciting and important. Covers topics seen in a high school or first-year college biology course.

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 Biology channel: https://www.youtube.com/channe....l/UC82qE46vcTn7lP4tK
Subscribe to Khan Academy: 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/sc....ience/ap-biology/che

How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom.

Watch the next lesson: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/v/atomic-number-mass-number-and-isotopes?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry

Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.

About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Chemistry channel: https://www.youtube.com/channe....l/UCyEot66LrwWFEMONv
Subscribe to Khan Academy: 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/hu....manities/world-histo

The attempted unification of church doctrine by Constantine through the Council of Nicaea. Especially resolving the Arian Controversy (based on the views of Arius of Alexandria). The Nicene Creed. Seeds of eventual schism in the church.

Missed the previous lesson? Watch here: https://www.khanacademy.org/hu....manities/world-histo

World History on Khan Academy: From the earliest civilizations to the modern world, geography, religion, trade, and politics have bound peoples and nations together — and torn them apart. Take a journey through time and space and discover the fascinating history behind the complex world we inhabit today.

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: https://www.youtube.com/subscr....iption_center?add_us

Sal talks with Stanford Professor Carol Dweck about her research on the Growth Mindset.

Join the You Can Learn Anything movement at www.khanacademy.org/YouCanLearnAnything

Learn the letter Z with Ollo the Elephant from Khan Academy Kids!

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 letters of the alphabet on our Letters and Letter Sounds playlist here: http://khan.co/KhanKids-Letters

Subscribe to our channel for more videos like this.

Join Caroline and Sophie on Circle Time with Khan Academy Kids as they read the story “That Won’t Float” by Cynthia Platt. Try an experiment with Caroline to see what things sink and what things float in a bowl of water. Then, enjoy a fun show and tell with dinosaur artwork, surf lessons, and handwashing tips from friends.



We’ll be bringing you a new Circle Time every other week. Remember to subscribe and hit the notification button for reminders!


Would your kids like to be on Show & Tell? Submit your artwork, photos, or videos here: http://khan.co/KhanKids-SubmitYourArt.

Learn more about Khan Academy Kids, our free educational app for children ages 2-7, 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

Access all of our Circle Time videos on our Circle Time Playlist! http://khan.co/KhanKids-CircleTimePlaylist.

Questions or ideas for Circle Time? Reach our team at khankids@khanacademy.org.

Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

The distinctive feature of the Italian Army in World War Two was its poor and insufficient armament.
Even though weapons produced at the famous Italian arms factory Beretta were of the highest quality, the rest were known for their very low quality or obsolete nature.

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

Get the Simple History books on Amazon:

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Credit:
Created by Daniel Turner

Narrator:

Chris Kane
https://vocalforge.com/

Music Credit:
Failing Defense by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/

Sources:
Bishop, Chris. The Encyclopedia of Weapons of World War II, 1998
Hogg, Ian. Encyclopedia of Infantry Weapons of World War II, 1986
Weeks, John. World War II Small Arms, 1989
Jowett, Phillip. The Italian Army 1940–45 (1): Europe 1940–43. 2000

2nd Channel: https://www.youtube.com/@simplehistory2
Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

Today around 250,000 veterans are still disabled by a mysterious disease known as Gulf War Syndrome, a medical anomaly with a distinctive set of symptoms that strangely only affects soldiers who served in the 1991 Persian Gulf War.
For decades the causes of this peculiar chronic illness baffled and divided scientists, as they debated whether the malady had a psychological or biological explanation, and it is only recently, over 30 years after the end of the conflict, that some of them have claimed to have found a definitive answer.


SIMPLE HISTORY MERCHANDISE

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Created by Daniel Turner (B.A. (Hons) in History, University College London)

Narrator:

Chris Kane
https://vocalforge.com/

For the best selling history themed tabletop games head over to warlord games and check out the Naval warfare in the Black Powder series!
http://store.warlordgames.com/?aff=SimpleHistory
This type of projectile was particularly effective against the sails, masts, and rigging of a ship, shredding and tearing them apart.

Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory


Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

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Simple history gives you the facts, simple!

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Credit:
Created by Daniel Turner
Script: Conan White


Narrator:
Bryan 'Lazlo' Beauregard

Music Credit:

Achaidh Cheide - Celtic by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/



Kings of the Sea: Charles II, James II & the Royal Navy
By J. D. Davies
Ship Decoration, 1630–1780
By Andy Peters
Pepyss Navy: Ships, Men and Warfare, 1649–89
By J. D. Davies

Artillery Through The Ages: A Short Illustrated History Of Cannon, Emphasizing Types Used In America
by Albert C. Manucy

⚓Play World of Warships for free: http://bit.ly/2J6r5Q3 New players will receive 1 Million Credits, the USS Langley Aircraft Carrier, 3 days premium time, and more by using my code PLAYLANGLEY2019. Big thanks to Wargaming for sponsoring.

In the American Civil war there were units on both sides which had uniforms heavily influenced by their individual heritage, fashion crazes or special requirements.

The Confederates had one unit that embraced their heritage to the extreme and that was company A of the 31st Virginia Militia.


Become a Simple History member: https://www.youtube.com/simplehistory/join
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Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

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Credit:
Created by Daniel Turner

Script: Conan White

Narrator:

Bryan Lazlo
Sources:

https://pastebin.com/QiP2cfa6

Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

On the 7th September, 1940 Germany started bombing civilian targets in an attempt to get Britain to surrender into submission.
German bombers attacked British cities, ports and industrial areas.
This was known as the ‘the Blitz’.

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

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Credit:
Created by Daniel Turner

Narrator:

Christian H. Miles


Music Credit

The Descent by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/

#Shorts

This statistics video tutorial explains how to make a histogram using a frequency distribution table.

Introduction to Statistics: https://www.youtube.com/watch?v=XZo4xyJXCak

Arithmetic, Geometric, & Harmonic Mean:
https://www.youtube.com/watch?v=6G6i8vSa8Zs

Simple Frequency Tables:
https://www.youtube.com/watch?v=lyRbCwDDnJo

Relative Frequency Distribution Table:
https://www.youtube.com/watch?v=gq3FPpm2yvA

Cumulative Relative Frequency Table:
https://www.youtube.com/watch?v=6hJGa4Zp62M

_________________________________
Dot Plots and Frequency Tables:
https://www.youtube.com/watch?v=Iu17mY1VfZU

Stem and Leaf Plots:
https://www.youtube.com/watch?v=MUCvUgGfzdo

Side By Side Stem and Leaf Plots:
https://www.youtube.com/watch?v=wkAjnGmRPVo

Histograms:
https://www.youtube.com/watch?v=AndS0RLdxtk

How To Make a Frequency Polygon:
https://www.youtube.com/watch?v=y7Wb9AjbRjo

__________________________________
Quartiles, Deciles, & Percentiles:
https://www.youtube.com/watch?v=40o82o3uNfk

Interquartile Range & Outliers:
https://www.youtube.com/watch?v=STSP8gTSdT8

Skewness & Symmetric Distribution:
https://www.youtube.com/watch?v=U0NZu6f5TMI

Sample Mean and Population Mean:
https://www.youtube.com/watch?v=cmtBUWCC-6A

Mean, Median, & Mode - Grouped Data:
https://www.youtube.com/watch?v=zjHfAhcU6kE

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

This Calculus 2 video tutorial explains how to find the area of a polar curve in polar coordinates. It provides resources on how to graph a polar equation and how to find the area of the shaded region. It contains plenty of examples and practice problems on how to find the area of one loop or of one petal and how to find the area of the inner loop as well.

Area of Parametric Curves: https://www.youtube.com/watch?v=riEx7TcLfzk

Area of Polar Curves:
https://www.youtube.com/watch?v=GQ6cDvY8K9g

Area Between Polar Curves:
https://www.youtube.com/watch?v=TwKxDApaxVo

Arc Length of Polar Curves:
https://www.youtube.com/watch?v=bxswSV1utxg

Surface Area of Polar Curves:
https://www.youtube.com/watch?v=n-Zg7WgRzjA

_____________________________
Writing Equations of Ellipses:
https://www.youtube.com/watch?v=OPSCKXXvWiM

Eccentricity of an Ellipse:
https://www.youtube.com/watch?v=9hyQksn80ug

Area of an Ellipse:
https://www.youtube.com/watch?v=Mw3MeDLL8d4

Circumference of an Ellipse:
https://www.youtube.com/watch?v=r5pl_stL4c0

Hyperbolas - Conic Sections:
https://www.youtube.com/watch?v=Iu-4-fizlD4

______________________________
Parabolas - Conic Sections:
https://www.youtube.com/watch?v=KYgmOTLbuqE

Polar Equations of Conic Sections:
https://www.youtube.com/watch?v=rnvCG_BZcL4

Calculus 3 - Intro to Vectors:
https://www.youtube.com/watch?v=2_21erD-nBg

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

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

This geometry and trigonometry video tutorial explains how to calculate the arc length of a circle using a formula given the angle in radians the and the length of the radius. It also explains how to calculate the sector area in terms of pi or in radians. In addition, it also explains how to determine the area of a sector of a circle using an equation where the angle is given in degrees instead of radians. This video contains plenty of examples and practice problems.

Trigonometry - Basic Introduction:
https://www.youtube.com/watch?v=g8VCHoSk5_o

Introduction to Angles:
https://www.youtube.com/watch?v=oxhXz9_uyiM

Radians and Degrees:
https://www.youtube.com/watch?v=JmLN3QxshlE

What Exactly Is a Radian?
https://www.youtube.com/watch?v=CHCWXAkozHM

Coterminal Angles:
https://www.youtube.com/watch?v=RkMhGwp8pv4

_________________________
Decimal Degrees to DMS:
https://www.youtube.com/watch?v=W9kousU6AI0

Arc Length of a Circle and Sector Area:
https://www.youtube.com/watch?v=C9z3FXS7nlo

Linear Speed and Angular Velocity:
https://www.youtube.com/watch?v=FgTvlGm9jgE

Clock to Angle Problems:
https://www.youtube.com/watch?v=LEHYr0XfSyI

The Unit Circle:
https://www.youtube.com/watch?v=57VrEiEPD1I

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

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

This finance video tutorial provides a basic introduction into two liquidity ratios - the current ratio and the quick ratio also known as the acid test ratio. The current ratio is equal to the current assets divided by the current liabilities. A current ratio that is greater than 1 means that the current assets are greater in value than the current liabilities. The quick ratio is equal to a company's liquid assets divided by its current liabilities.

Stock Trading For Beginners:
https://www.youtube.com/watch?v=7IBzTZqeyo0

Return on Investment:
https://www.youtube.com/watch?v=Ci9Vz6SQFGk

The Dividend Yield:
https://www.youtube.com/watch?v=kQv8E1M6xq0

Dividends - Payout Ratio Vs Retention Ratio:
https://www.youtube.com/watch?v=B9066sRaZWs

Market Capitalization:
https://www.youtube.com/watch?v=9oZ12W6P9Eo

Price to Earnings (P/E) Ratio and Earnings Per Share (EPS):
https://www.youtube.com/watch?v=Ac-5L0Q_q14

___________________________________
PEG Ratio Vs Price To Earnings Ratio:
https://www.youtube.com/watch?v=QfNt8pAF1Co

Trailing PE Vs Forward PE Ratio:
https://www.youtube.com/watch?v=0WfwBAnhADs

Price to Sales (P/S) Ratio:
https://www.youtube.com/watch?v=Pk-jGoOVRyg

Price to Book (P/B) Ratio:
https://www.youtube.com/watch?v=5b7RlhdwI5Y

Currency Exchange Rate:
https://www.youtube.com/watch?v=JRf7_RKF3uA

Profit Margin & Operating Margin:
https://www.youtube.com/watch?v=uYM2YnwO-20

_____________________________________
Return on Assets (ROA) and Return on Equity (ROE):
https://www.youtube.com/watch?v=kXB4F55Juo8

Debt to Equity Ratio:
https://www.youtube.com/watch?v=enhdH7Tl5bY

Assets, Liabilities, & Equity:
https://www.youtube.com/watch?v=_-lVFKG5_08

The Short Ratio:
https://www.youtube.com/watch?v=9kQQ4iEdxiU

____________________________
Math and Science Videos:
https://www.video-tutor.net/

This physics video tutorial provides a basic introduction into lenz's law. It explains how to determine the direction of an induced current using the principles stated by lenz's law and using the right hand rule. This video on electromagnetic induction contains plenty of examples and practice problems.

Magnetism - Review:
https://www.youtube.com/watch?v=csMqfwJRjCs

Faraday's Law of Electromagnetic Induction:
https://www.youtube.com/watch?v=LDOa7UdfcMQ

Lenz's Law - Induced Current:
https://www.youtube.com/watch?v=HhFZfWLl-P0

Induced EMF In Moving Conductor:
https://www.youtube.com/watch?v=ogPT-Py-ss0

Electric Generators & Induced EMF:
https://www.youtube.com/watch?v=-QJS6i1bhG4

______________________________
Counter EMF of DC Motors:
https://www.youtube.com/watch?v=a7oj0REQzpE

Transformers - Physics Problems:
https://www.youtube.com/watch?v=GJm-FOMeG4E

Mutual Inductance & Solenoids:
https://www.youtube.com/watch?v=_w0vk7lFoqc

Self-Inductance of Inductors & Coils:
https://www.youtube.com/watch?v=gMn0MDl4vkc

How To Make an Electromagnet:
https://www.youtube.com/watch?v=4BUsCLPMQtk

_________________________________
Faraday's & Lenz's Law of Electromagnetic Induction:
https://www.youtube.com/watch?v=jz92oOkJFNA

Energy Stored In an Inductor:
https://www.youtube.com/watch?v=Yl2VeN1Zeu8

RL Circuits - Inductors & Resistors:
https://www.youtube.com/watch?v=RR0sQeDAxgk

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

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

This statistics video tutorial provides a basic introduction into the chi square test. It explains how to use the chi square distribution to perform a goodness of fit test to determine whether or not to accept or reject the null hypothesis.

Confidence Intervals & Margin of Error:
https://www.youtube.com/watch?v=DT-fPG0Hff8

Find The Z-Score Given Confidence Interval:
https://www.youtube.com/watch?v=sJyZ9vRhP7o

Student's T-Distribution:
https://www.youtube.com/watch?v=MUD390jtgQs

Hypothesis Testing - Null & Alternative:
https://www.youtube.com/watch?v=wiYJWyfdGg4

Type I and Type II Errors:
https://www.youtube.com/watch?v=9yQm9F2_yIk

One Tailed and Two Tailed Tests:
https://www.youtube.com/watch?v=XHPIEp-3yC0

_______________________________________
Test Static For Means & Pop Proportions:
https://www.youtube.com/watch?v=Hag0GW9B6EY

Hypothesis Testing Problems:
https://www.youtube.com/watch?v=zJ8e_wAWUzE

P-Value Method - Hypothesis Testing:
https://www.youtube.com/watch?v=8Aw45HN5lnA

Hypothesis Testing - Proportions:
https://www.youtube.com/watch?v=76VruarGn2Q

Difference of 2 Means - H Testing:
https://www.youtube.com/watch?v=UcZwyzwWU7o

Cohen's D - Pooled Standard Deviation:
https://www.youtube.com/watch?v=GDe4M0xEghs

Hypothesis Testing - 2 Proportions:
https://www.youtube.com/watch?v=pCbNUnZ98oE

__________________________________
Matched or Paired Samples t-Test:
https://www.youtube.com/watch?v=JiQR0lHLe74

Chi Square Test:
https://www.youtube.com/watch?v=HKDqlYSLt68

Chi Square Distribution Test:
https://www.youtube.com/watch?v=O6a76Dnn104

Test of Independence - Chi Square Dist:
https://www.youtube.com/watch?v=y5nxiL6civU

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

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

Graphing a quadratic function in vertex form can be done easily when you understand the following:

What does the "a" value tell us about the quadratic function?
How to find the y-intercept?
How to find the vertex?
How to find the x-intercepts?

Some images made using Geogebra.

#VertexForm
#GraphingQuadratics
#GraphingParabola
#VertexFormtoGraph
#JoeCMath

0:00 Introduction
0:20 General steps to graph vertex form
1:12 Example 1
4:16 Example 2
6:16 Did you subscribe?

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How to Count Coins - Counting Coins Worksheets
In this captivating video from Kids Academy, a real teacher will guide your child through the world of coin values. Your little learner will recall different coins and their worth. Afterward, watch as the teacher counts the coins on the worksheet, matching them to the prices listed.
By watching this video, your child will enhance:
Mental Math and Addition Skills
Recollection and Ability to Add Using Money
Counting coins isn’t just about addition—it’s a practical skill that connects math to real-life scenarios! Use this video to give your child the practice needed for success in both math and life.
Counting Coins Worksheets for 1st, 2nd, and 3rd Grades
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