Not only is this the first time a commercial company is sending people into space, it is also the first crewed mission to the International Space Station to be launched from American soil in 9 years since the Space Shuttle was decommissioned. On the 27th of May SpaceX will make spaceflight history by being the first commercial company to transport humans to the ISS on a Falcon9 rocket in the SpaceX Dragon Crew spacecraft. This is the beginning of commercial spaceflight and potentially the beginning of space tourism.

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Just like many great duos throughout history, Bulgaria and Germany have a fascinating (though uneven) relationship. In today’s episode, we’re going to take a closer look at the impact of politics on economies as we trace this history of Bulgaria and Germany following World War II, and examine the ways capitalism, and communism, impacted their economic strength today.

SOURCES

General
Getis, Bjelland, and Getis. Introduction to Geography, 15 ed. McGraw-Hill Education. 2017. ISBN: 978-1-259-57000-1

Gregory, Derek, Ron Johnston, Geraldine Pratt, Michael Watts, and Sarah Whatmore, eds. 2009. The Dictionary of Human Geography. 5th ed. Willey-Blackwell. ISBN: 978-1-4051-3288-6

For a free and open source option for Intro to Human Geography, see: https://humangeography.pressbooks.com/

For a free and open source option for World Regional Geography, see: https://worldgeography.pressbo....oks.com/front-matter

Cracking the AP Human Geography Exam: 2020 edition. The Princeton Review.

Sofia and Bulgaria General History
https://en.wikipedia.org/wiki/Sofia
https://www.cia.gov/the-world-....factbook/countries/b

Germany
https://vividmaps.com/germany-....is-still-divided-by-
https://www.britannica.com/pla....ce/Germany/The-East-
https://www.arcgis.com/apps/Ca....scade/index.html?app
https://www.pewresearch.org/fa....ct-tank/2019/11/06/e
https://www.bmwi.de/Redaktion/EN/Publikationen/jahresbericht-zum-stand-der-deutschen-einheit-2018.pdf?__blob=publicationFile&v=3

Bulgaria Economy
https://etd.ohiolink.edu/apexprod/rws_olink/r/1501/10?clear=10&p10_accession_num=osu1141408829
https://www.cia.gov/the-world-....factbook/countries/b#economy
https://www.worldbank.org/en/c....ountry/bulgaria/over
https://open.lib.umn.edu/world....geography/chapter/2-
https://www.imf.org/en/Publica....tions/SPROLLS/world-
https://www.imf.org/en/Countries/BGR
https://www.worldstopexports.c....om/bulgarias-top-15-
https://oec.world/en/profile/b....ilateral-country/rou
https://www.bbc.com/news/world-europe-17202996
http://news.bbc.co.uk/2/hi/europe/4001113.stm
http://news.bbc.co.uk/1/hi/world/europe/327199.stm

German Bulgaria relations
https://oec.world/en/profile/b....ilateral-country/deu
https://www.trademap.org/Count....ry_SelProductCountry
https://en.wikipedia.org/wiki/....Bulgaria%E2%80%93Ger

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Educational video for children where they will discover some of the most incredible animals that live in the water. In this video, they will learn curiosities about the behavior, habitat, and special characteristics that make these animals unique. Through colorful animations and simple explanations, little ones will learn more about aquatic fauna and develop their love for nature and the environment.

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An ideal resource for learning about the animal world, biodiversity, and environmental education, both in class and at home. Recommended for children in preschool and elementary school.

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Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via the periodic table.

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Table of Contents
Snobby Scientists 00:43
Great Dane/Bohr Model 01:57
Electrons as Music 04:13
Electron Shells and Orbitals 04:44
Electron Configurations 05:54
Ionization and Electron Affinities 08:17
Periodic Table 10:18

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Can two people who make the same bad decision bear different levels of moral responsibility? Today, we try to address this question with the concept of moral luck. Hank explains the difference between moral and causal responsibility and the reasons we assign praise and blame.

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This is the story of how a young Englishman named William Shakespeare stormed London's theater scene in the late 16th century, and wrote a bunch of plays and poems that have had pretty good staying power. We'll learn about Shakespeare's beginnings, his family, and how he broke into theater

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How Many Faces, Edges And Vertices Does A Rectangular Prism Have?
Here we’ll look at how to work out the faces, edges and vertices of a rectangular prism.
We’ll start by counting the faces, these are the flat surfaces. A rectangular prism has 6 faces altogether - all rectangular in shape.
Next we’ll work out how many edges the rectangular prism has, which are where two faces meet. A rectangular proven has 12 edges.
Next we’ll count the corners of the rectangular prism (the corners). Altogether it has 8.

For the full playlist for the faces, edges and Vertices of a whole lot of 3D shapes go to https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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What will make ChatGPT even smarter? How to always get answers to exciting and difficult questions? What should be done so that ChatGPT can always help you when you ask for it? In this video, I will tell you about the secret methods that will help you get a shocking result after entering the ChatGPT request! Why didn't anyone talk about this before? Of course, everyone has already heard about the possibilities of this AI, but it can be made more effective! But how? Be sure to watch this video from start to finish to learn how to make ChatGPT smarter several times over!

Permutations and Combinations tell us the number of different arrangements of items or numbers that can occur. In this lesson we look at the counting principle - a fast method of counting the number of various arrangements through multiplication.
In this video we also use combinations and permutation counting principles to answer some of the big questions of life - how many different outfit combinations do you have, how many lotto permutations are there, why do they call the tecmath the Count?
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In this lesson, you will learn to multiply fractions quickly and easily.
To multiply fractions you multiply across the numerators (the top number of a fraction) and multiply across the denominators (the bottom number).

An example I always use to start this off is multiply 1/2 with a 1/2. The numerators multiply to give 1 (1 x1), the denominators multiply to give 4 (2x2). Hence a 1/2 multiplied by a 1/2 is 1/4.

What about if you multiply 2/3x1/4?
Top number (2x1), bottom number (3x4).
So 2/3x1/4 = 2/12. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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In this lesson, you will learn how to find the inverse of a function algebraically and graphically as we work through finding the inverse of a function examples!

Key Questions: What is the inverse of a function? How can I find the inverse of a function algebraically? Are there any inverse of a function tricks to make the process easier?

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Understanding the definition and motivation for radians and the relationship between radians and degrees

Practice this lesson yourself on KhanAcademy.org right now:
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Missed the previous lesson?
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Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ("trig" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!

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.

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L40 | Vedic Math Course | Division by 11 | Fast Calculation | Blade learner K12

In this video Mr. Amit Kumar will be teaching the viewers about Vedic Mathematics from the very beginning. This fortieth video is based on the trick where you will learn about the division of any number by 11 in just few seconds. So all the best for new journey. For more such videos, check out our playlists. Stay tuned for further updates. Thanks
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Contents to be discussed-

00:00 - Introduction
00:24 - Example 1 (Vedic Math Division)
01:53 - Example 2 (Vedic Math Division)
02:35 - Example 3 (Vedic Math Division)
03:56 - Example 4 (Vedic Math Division)

This time, the cross section of our solid is given as the area between two curves.

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-definite-integrals/ab-vol-cross-sections/e/volumes-of-solids-of-known-cross-section?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-definite-integrals/ab-disk-method/v/disk-method-around-x-axis?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-definite-integrals/ab-vol-cross-sections/v/volume-solid-semicircle-cross-section?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago.

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.

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This is a math video lesson to help you with new math, math tricks, and or simple math questions you may have.

Ratio of Perimeter Area and Volume

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Which beverage would you rather drink: milk, soda, water, or orange juice? Each one of these liquids tastes very different. Why? Because they all have different levels of chemicals called acids and bases. In this video for kids, you will learn why liquids, and even the foods you eat, taste a certain way.

Acids tend to be on the sour side. In fact, the more acidic something is, the more sour it will taste. Bases, on the other hand, taste bitter. The more basic (or alkaline) a substance, the more bitter it will be. Lemon juice is a great example of a very acidic liquid. Almond milk is a great example of a basic liquid.

When something is acidic, the molecules split apart and release hydrogen ions. Molecules of basic substances split apart and release hydroxide ions and reduce the number of hydrogen ions. A higher number of hydrogen ions yields a more acidic solution while a higher number of hydroxide ions yields a more basic or alkaline solution.

Examples of acids and bases are everywhere. Apart from the liquids we drink, acids are also found in car batteries, and bases are often found in household cleaning products. In addition, our bodies contain both acids and bases. The stomach has hydrochloric acid to help digest food and kill bad bacteria. The pancreas contains a base that helps with digestion as well.

You will also learn about the pH scale and about indicators. The pH scale measures the level of acidity or base, or number of hydrogen ions, in a specific substance. The scale goes from 0 to 14, with numbers between 0–7 indicating acids and between 7–14 indicating bases. Litmus paper is one of the most common indicators. When put in a solution, it will turn red to indicate an acid or blue to indicate a base.

We hope you and your student(s) enjoyed learning about these interesting chemicals! If you want to learn even more, head over to our website and download one of our many free lesson plans, full of activities, worksheets, and more!

https://learnbright.org/lesson....s/science/acids-and-

What you will learn in Acids and Bases for Kids:
0:00 Introduction to acids and bases
0:51 Comparing lemon juice to almond milk
1:45 Examples of acids and what acid means
3:13 Examples of bases and what a base is
4:27 The pH scale
5:57 How acids and bases can neutralize each other
6:39 What is an indicator?
7:22 Using litmus paper to test lemon juice and almond milk
7:56 Review of the facts

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