Let's find out the correct way to measure length of objects!

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

Activity: https://youtu.be/V_DN2NLVxeI

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

Let's explore how we can generalize the mirror formula by introducing cartesian sign conventions.

Created by Mahesh Shenoy

Let's solve a numerical on a curved surface refraction
Created by Mahesh Shenoy

Let's explore the common defects, Myopia (shortsightedness) and hypermetropia (farsightedness) using ray diagrams.

Created by Mahesh Shenoy

This video talks about how a nucleophile attacks a given carbonyl compound, the mechanism involved, and the change in hybridisation of the central atom during the process. The video also talks about the difference in mechanism observed when a neutral nucleophile attacks an aldehyde or a ketone instead of an anionic one.

00:00- Introduction
00:10- What are nucleophiles?
1:30- Mechanism of nucleophilic attack
3:22- Hybridisation of the central atom in the reactant, intermediate and product.
4:45- Attack of a neutral nucleophile

Practice this concept - https://www.khanacademy.org/sc....ience/class-12-chemi

Master the concept of Introduction to Aldehydes and Ketones through practice exercises and videos - https://www.khanacademy.org/sc....ience/class-12-chemi

Check out more videos and exercises on Aldehydes, Ketones and Carboxylic acids - https://www.khanacademy.org/sc....ience/class-12-chemi

To get you fully ready for your exam and help you fall in love with Chemistry, find the complete bank of exercises and videos for Class 12 Chemistry (India) here - 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 you will learn about the Urdhvatiryak method of multiplication , we have covered multiplication of 2 digit numbers in here.

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
Devashish Phadnis

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Lots of practice with various types of equations. Watch out for inadmissible solutions Most questions involve quadratics so you must be good at switching between logarithmic and exponential forms. Be a log bae!!

Dr Siyuan Tian from the Australian National University (anu.edu.au) shares her research tracking bushfire smoke in the layers of Earth's atmosphere. This as part of a series of educational videos on Earth's atmosphere.

This clip has been created by the Research School of Earth Sciences (rses.anu.edu.au). These resources are part of a comprehensive program, curriculum matched to the unit 'Introduction to Earth systems'.

This video touches on the following curriculum descriptors:
The modern atmosphere has a layered structure characterised by changes in temperature: the troposphere, mesosphere, stratosphere and thermosphere (ACSES022)

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

During the early Permian, life on land and in the ocean would look much as it did at the end of the Carboniferous. However, the changing climate, from warm and moist during much of the Carboniferous, to cool and arid at the start of the Permian, would lead to many changes throughout the period. By the end of the Permian, many of the water-loving plant species would be replaced by seed ferns and conifers, plants that were better adapted to the drier environment of Pangea. The amphibians, which had dominated aquatic and terrestrial biomes during the Carboniferous, were replaced by rapidly diversifying reptiles. However, the Permian period would end with the single greatest catastrophe life on Earth has ever seen. The end-Permian mass extinction, known as the Great Dying, would cause the extinction of nearly 97% of species on the planet.

⁣The mole, symbol mol, is the unit of amount of substance in the International System of Units. The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample. The mole is defined as containing exactly 6.02214076×10²³ elementary entities.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

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This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.