Top videos
What happens when you rub twi straws with a cloth and bring them close? Something, very interesting! Let's find out!
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
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Created by Vibhor Pandey
http://www.rootmath.org | Linear Algebra
We learn the definition of the dot product and we see an example. In the next video we will see how this definition helps us to define the angle between two vectors.
We start to examine how to deal with situations in which an object's velocity is not constant. This will be the topic of the next topic unit, and so this video is somewhat of a preview of things to come.
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Is the magnetic strength of a magnet constant throughout its length or does it vary at the ends? Let's find out!
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy.
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Created by Vibhor Pandey
This video talks about the mechanism involved in an SN1 reaction. It also elaborates on what is a rate determining step and how it affects the rate of a reaction. We learn how to calculate the rate of an SN1 reaction and also, what is the order of an SN1 reaction. In the end, it tells why the nucleophile does not affect the rate of an SN1 reaction while the concentration and type of substrate does.
00:00- Introduction
00:30- What is nucleophilic substitution?
1:15- How does nucleophilic substitution occur?
1:40- Mechanism of SN1 reaction
3:00- What is RDS?
4:11- Equation for reaction rate
5:47- Factors affecting the rate
Master the concept of “SN1/SN2/E1/E2” through practice exercises and videos - https://www.khanacademy.org/sc....ience/class-12-chemi
Check out more videos and exercises on “Haloalkanes and Haloarenes” - https://www.khanacademy.org/sc....ience/class-12-chemi
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy.
Subscribe to our YouTube channel - https://www.youtube.com/c/khanacademy
As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Created by
Aanchal Arora
http://www.rootmath.org | Calculus
In this video we use a u-sub and the natural log rule to integrate tanx.
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The equations of linear motion are used to understand the position, velocity, and acceleration of an object moving in a straight line. There are four main equations of linear motion, which are:
1. s = ut + 1/2 at^2 - This equation relates the distance traveled s by an object to its initial velocity u, acceleration a, and time t.
2. v = u + at - This equation relates the final velocity v of an object to its initial velocity u, acceleration a, and time t.
3. v^2 = u^2 + 2as - This equation relates the final velocity v of an object to its initial velocity u, acceleration a, and the distance traveled s.
4. s = (u + v) t / 2 - This equation relates the distance traveled s by an object in terms of its initial velocity u, final velocity v, and time t.
Here,
s = distance traveled by the object
u = initial velocity of the object
v = final velocity of the object
a = acceleration of the object
t = time taken for the motion
These four equations can be used to solve a variety of problems related to linear motion. For example, if we know the initial velocity, acceleration, and time taken by an object, we can use the first equation to calculate the distance traveled by the object. Similarly, if we know the initial and final velocities and the acceleration, we can use the third equation to calculate the distance traveled by the object.
As far as African dictators go, there is probably no single greater illustration of the nuances and complexities that underpin dictatorships in Africa, than Joseph Desire Mobutu’s 31 year stint, as the leader of the nation known today as the DRC.
A self-proclaimed anti-communist who modelled his entire state apparatus after China’s chairman Mao. A self-styled African revolutionary, who collaborated with his country’s former colonisers to assassinate his own prime minister and a proud Afrocentric, whose love for European luxuries and prestige would see him seize control of an estimated one third of his country’s GDP and build a personal net worth nearly twice the size of his country’s national debt.
A paradoxical man from a nation of paradox. Mobutu may have been stereotypically arrogant and cruel, but he was far from a simpleton. His over 3 decades as Congo’s Supreme leader, would be built on a complex combination of evil genius, will power and good fortune.
#congo #africa #history
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Written by: K.B. Taiwo
In this video, we explore the possible reactions living organisms have towards non-living factors, like temperature and salt concentration.
Timestamps:
00:00 - Homeostasis
01:43 - Regulators
02:56 - Conformers
04:31 - Partial regulators
05:12 - Response graph
07:15 - Migration and suspension
Practice these concepts:
https://www.khanacademy.org/sc....ience/in-in-class-12
https://www.khanacademy.org/sc....ience/in-in-class-12
Master the concept of Organisms and their Environments through practice exercises and videos: https://www.khanacademy.org/sc....ience/in-in-class-12
Check out more videos and exercises on Organisms and Populations: https://www.khanacademy.org/sc....ience/in-in-class-12
To get you fully ready for your exam and help you fall in love with biology, find the complete bank of exercises and videos for Class 12 Biology here: https://www.khanacademy.org/sc....ience/in-in-class-12
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy!
Subscribe to our YouTube channel: https://www.youtube.com/c/khanacademy
As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Created by Sulagna Das
I rant a bit more about how vectors can't be positive or negative.
After a short flight from the Indonesian capital of Jakarta, Garuda Flight 200 is on approach to the city of Yogyakarta. The Boeing 737 is cleared to land. But when it does, the aircraft hits the ground so hard it bounces violently and careens off the end of the runway. The plane finally comes to a stop in a nearby rice paddy. Fire quickly engulfs the wreckage, and the passengers—many of them badly injured—struggle to escape the inferno.
What crucial error in the aircraft's systems led to the inability of the crew to restart the engines?
Watch more episodes here: https://www.youtube.com/playli....st?list=PLiXVS8S6-YA
Mayday: Air Disaster - The Accident Files : From Season 2 Episode 7 "Runway in Sight":
If pilots aren’t prepared when the runway is in sight, a landing can quickly become a tragedy. On its final approach, an Indonesian passenger jet smashes down at a catastrophically high speed. Without warning, a Delta flight crew faces a deadly storm just before touchdown in Dallas. And, tragedy strikes in San Francisco when a Boeing 777 crew lands short of the runway.
Every time a plane crashes, the world takes notice, and so do the experts whose job it is to figure out what happened. Mayday uncovers the truth behind the most legendary aviation disasters, and every episode features eyewitness accounts, captivating reenactments, state-of-the-art CGI, and interviews with the investigators who ultimately determined what went wrong.
Welcome to the OFFICIAL Mayday: Air Disaster YouTube Channel.
Mayday: Air Disaster is a dramatic non-fiction series that investigates high-profile air disasters to uncover how and why they happened. Mayday: Air Disaster follows survivors, family members of crash victims and transportation safety investigators as they piece together the evidence of the causes of major accidents. So climb into the cockpit for an experience you won’t soon forget.
Subscribe to the OFFICIAL Mayday: Air Disaster channel here: https://bit.ly/2PQnaMI
#MaydayAirDisaster #MaydayInvestigation #AirEmergency #MaydayEpisodes #planecrashes #airplanecrashes #aviationaccidents #Fullepisode #airplanedisasterdocumentary #aircrashinvestigation
Welcome to the world of Microbiology! In this video That Bio Doc introduces you to the types of organisms that are studied by microbiologists and their impact on human health.
Music:
Cheery Monday by Kevin MacLeod
Link: https://incompetech.filmmusic.....io/song/3495-cheery-
License: http://creativecommons.org/licenses/by/4.0/
What happens when you bring two north poles of a magnet close to each other, and what happens when you bring north and a South Pole close to each other? Let's find out!
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy.
Subscribe to our YouTube channel - https://www.youtube.com/c/khanacademy
As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Created by Vibhor Pandey
This video talks about the effect of a leaving group and solvent on the rate of an SN1 reaction.
00:11- Mechanism of SN1 reaction.
00:35- Why care about the leaving group stability?
1:12- Examples!
4:54- Effect of solvent
Master the concept of “SN1/SN2/E1/E2” through practice exercises and videos - https://www.khanacademy.org/sc....ience/class-12-chemi
Check out more videos and exercises on “Haloalkanes and haloarenes” - https://www.khanacademy.org/sc....ience/class-12-chemi
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy.
Subscribe to our YouTube channel - https://www.youtube.com/c/khanacademy
As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Created by
Aanchal Arora
In this video, we explore how today's population can help us predict how it will be like in the future. And, talk about the showrunner of this prediction: the age pyramids.
Timestamps:
00:00 - What is an age pyramid?
01:52 - Expanding age pyramid
05:44 - Declining age pyramid
07:48 - Stable age pyramid
09:32 - India's age pyramid
Practice this concept: https://www.khanacademy.org/sc....ience/in-in-class-12
Master the concept of Organisms and their Environments through practice exercises and videos: https://www.khanacademy.org/sc....ience/in-in-class-12
Check out more videos and exercises on Organisms and Populations: https://www.khanacademy.org/sc....ience/in-in-class-12
To get you fully ready for your exam and help you fall in love with biology, find the complete bank of exercises and videos for Class 12 Biology here: https://www.khanacademy.org/sc....ience/in-in-class-12
Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.
Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy!
Subscribe to our YouTube channel: https://www.youtube.com/c/khanacademy
As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Created by Sulagna Das
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