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Chain Reaction in Nuclear Fission: When slow neutrons are bombarded on uranium, each uranium nucleus is broken in to two almost equal parts and along with it enormous energy and two or three trash neutrons are emitted. If the conditions are favorable, these neutrons take part in the fission.This leads to a chain of nuclear fissions which continues till the whole of the Uranium is consumed. Thus the energy produced keep on multiplying.We have seen that about 200 MeV MeV- mega electron volts of energy is released due to fission of 1 Uranium nucleus. In this chain reaction, the number of nuclei undergoing fission increases very rapidly, hence the energy produced acquires an enormous amount very soon."The chain reaction is a series of nuclear fissions in which the neutrons produced in each fission cause additional fissions."This chain reaction liberate tremendous amount of energy within short interval of time. But sustaining a self--propagating chain reaction is not easy in practice, because the progressive chain reaction is inhibited due to the following reasons.A Ordinary uranium consists of three isotopes 92U238 92 Uranium 238, 92U236 92 Uranium 236 and 92U235 92 Uranium 235. The major part of ordinary uranium is the isotope 92U238 92 Uranium 238 the remaining are rare. Now, 92U238 92 Uranium 238 can be fissioned only with fast neutrons 1 MeV while 92U235 can be fissioned with slow as well as slow and fast neutrons. Neutrons having energy less than 1 MeV are absorbed by 92U238 through these low energy neutrons can take part is the fission of 92U235 but the probability of their absorption by U238 is much more. Thus the fresh neutrons released in the fission of ordinary uranium being absorbed by U238 are not able continue the chain reaction. This difficulty can be removed in the following two ways: The lighter isotope U235 can be separated from the ordinary uranium by diffusion method. The fission of U235 is now possible by neutrons of any energy high or low. So chain reaction continuous as shows in above.The second way is to slow down the neutrons by any method. So that their energy remains 0.03 eV This can be achieved with help of moderators, which reduce the speed of neutrons very rapidly. Graphite and heavy water are good moderators.The second difficulty in maintaining the chain reaction is that the fast neutrons released by the fission of U235 travel a distance of about 10 centimeter in the substance before they are slow down and fission other nuclei.Therefore, to continue the chain--reaction, the size of the fissionable substance should be bigger than a certain critical size.

Mr. Andersen defines the terms energy, work and power. He also uses a simple example to calculate both work and power.

Intro Music Atribution
Title: I4dsong_loop_main.wav
Artist: CosmicD
Link to sound: http://www.freesound.org/peopl....e/CosmicD/sounds/725
Creative Commons Atribution License

The Periodic Table. The first 20 elements. All credit to ASAP SCIENCE!! Thanks alot. For full version
https://www.youtube.com/watch?v=VgVQKCcfwnU

Credit to @AsapSCIENCE for creating this song: https://www.youtube.com/watch?v=rz4Dd1I_fX0

This video features all 118 elements of the periodic table. However, each element shown also includes a countryball / polandball /country referencing their historical and scientific uses.

"The Periodic Table Song but with Countryballs"

Based on the "Can-Can" music, by Offenbach.

LYRICS:

There's Hydrogen and Helium
Then Lithium, Beryllium
Boron, Carbon everywhere
Nitrogen all through the air

With Oxygen so you can breathe
And Fluorine for your pretty teeth
Neon to light up the signs
Sodium for salty times

Magnesium, Aluminium, Silicon
Phosphorus, then Sulfur, Chlorine and Argon
Potassium, and Calcium so you'll grow strong
Scandium, Titanium, Vanadium and Chromium and Manganese

CHORUS
This is the Periodic Table
Noble gas is stable
Halogens and Alkali react agressively
Each period will see new outer shells
While electrons are added moving to the right

Iron is the 26th
Then Cobalt, Nickel coins you get
Copper, Zinc and Gallium
Germanium and Arsenic

Selenium and Bromine film
While Krypton helps light up your room
Rubidium and Strontium then Yttrium, Zirconium

Niobium, Molybdenum, Technetium
Ruthenium, Rhodium, Palladium
Silver-ware then Cadmium and Indium
Tin-cans, Antimony then Tellurium and Iodine and Xenon and then Caesium and...

Barium is 56 and this is where the table splits
Where Lanthanides have just begun
Lanthanum, Cerium and Praseodymium

Neodymium's next too
Promethium, then 62's
Samarium, Europium, Gadolinium and Terbium
Dysprosium, Holmium, Erbium, Thulium
Ytterbium, Lutetium

Hafnium, Tantalum, Tungsten then we're on to
Rhenium, Osmium and Iridium
Platinum, Gold to make you rich till you grow old
Mercury to tell you when it's really cold

Thallium and Lead then Bismuth for your tummy
Polonium, Astatine would not be yummy
Radon, Francium will last a little time
Radium then Actinides at 89

REPEAT CHORUS

Actinium, Thorium, Protactinium
Uranium, Neptunium, Plutonium
Americium, Curium, Berkelium
Californium, Einsteinium, Fermium
Mendelevium, Nobelium, Lawrencium
Rutherfordium, Dubnium, Seaborgium
Bohrium, Hassium then Meitnerium
Darmstadtium, Roentgenium, Copernicium

Nihonium, Flerovium
Moscovium, Livermorium
Tennessine and Oganesson
And then we're done!!

20 7 / 39 8 92 / 92 60 68 16 73 60 / 90 53 16 ?

#countryballs #science #chemistry

This video explores techniques to improve math skills for K-12 students.

"Give Me Half!" written by Stuart J. Murphy and illustrated by G. Brian Karas and is a wonderful introduction book when introducing fractions; specifically halves. The book is part of the MathStart series published by Harper Collins. It is a story about a brother and a sister who do not like to share with each other. In the end they learn that sharing half truly is the best way to make equal parts.

This is a good book to have in the classroom or home library for reading and re-reading. Kids will love the illustrations and use them as context clues to help them decipher words. As an Amazon Affiliate, should you decide to make a purchase, I might make a small commission at zero cost to you. Here is the link, thank you!

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#fractions #math #readaloud

FREE TRIAL LINK:
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Thank you for watching our addition math facts song about adding doubles and learning to add with us!

Do you know the 9 times table? I am sure you know, here in this video I present you the easy ways to learn and memorize the 9 times table. This tricks will be really helpful to remember the 9 times table, so please share this video with your friends and family after you watch this video, thank you!

# 9timestabletrick #learntabletricks #mathtables

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Learn to multiply 1 through 10 with the multiplication table with this fun educational multiplication song . Brought to you by KLT!

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Video: Copyright 2015, 2016, 2017, 2018 KLT
Lyrics:
I am the Multiplication Table
Remember me because you are able
We’ll learn to multiply 1 through 10
Up to 100 because you can

Let’s start by learning how the Times Table works
Because learning to multiply is one of life's perks

You see that vertical line
It’s numbered 1 through 10
And that horizontal line is numbered the same again

All these numbers on the inside we will cover next
They’re the answers to the equations
You will see in a text

For example, if you look at
the number 2
And want to multiply it by 7
Here’s what you’ll do

Let’s use this 2 from the
vertical side
And multiply it with the 7 on the horizontal guide

Run a line from the 2 if you know
what I mean
And a line from the 7 down to see where they meet

Where the two lines collide will be the answer you seek
2 X 7 = 14
This equation is complete

You can also use the Horizontal number
2
And the Vertical 7 to achieve the same results it’s true

Now let’s try and multiply
5 X 5
Where the two lines meet the answer is 25

Another example is multiplying
9 X 6
The two lines meet at 54 where your eyes are transfixed

Here’s one more equation it’s
8 X 4
The answer is 32. After this chorus, there’s more

I am the Multiplication Table
Remember me because you are able
We’ll learn to multiply 1 through 10
Up to 100 because you can

When we start at the X
And count diagonally down
You’ll find the answer to each number multiplied by itself without a frown

You’ll see 1 X 1 = 1 and here are some more
Then you see 2 X 2 and it does equal 4

3 X 3 = 9 and 4 X 4 is 16
5 X 5 is 25 now you know what I mean

6 X 6 = 36 and 7 X 7 is 49
8 X 8 = 64 I know you’re feeling fine
9 X 9 = 81. Yeah, that’s what I said.
And 10 X 10 = 100 you can see here in red
You can move across or down and
And multiply each number on its own
Let’s try a couple out
Then you can continue at home
Multiplying by 1. Yeah,
it is so easy
You always end up with the same number
you multiplied by you see
For example, 1 X 1 = 1 and 2 X 1 is 2
And 3 X 1 = 3. Now you practice too
Let’s move to 2 and count straight across
2 4 6 8 10 Start over if you’re lost
12 14 16 18 and 20
Let’s try one more row. Start at number 3
3 6 9 12 15 18
21 24 27 and 30
Download your time's table sheet from KLT’s site
And practice multiplying till you get it right

#multiply #multiplication #educational #multiplicationsong #kids #multiplicationtable #KidsLearningTube

What are the types of numbers | Natural Numbers | Whole Numbers | Integers | Real numbers | Imaginary number | Zero math

About Video :
Hello all,
In This video I have covered the definitions of different types of number such as Natural number, Whole Number, Prime Number, Composite number, real number and imaginary number.
I have explained in detail that after viewing it once you won't ever forget for lifetime

what you will Learn from this video :
- what are the number types in math ?
- is 1 prime number or composite number
- pi is rational number or irrational number
- how to remember number types ?
- what are rational and irrational numbers
- what are irrational numbers
- Number types in math
- Number system
- Natural Numbers
- Whole Numbers
- Integers
- Prime numbers
- Composite numbers
- rational numbers
- irrational numbers
- what are real numbers
- what are imaginary numbers
- Classification of Numbers (Natural, Whole, Integers, Rational, Irrational, Real)


So, if you really want to receive timely updates Do SUBSCRIBE our channel and click don't forget to click on Bell icon.

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#NumberTypes #NumberSystem #Math

You Can visit the Zero Math Facebook page on below link :
https://www.facebook.com/thezeromath/

Some of the other interesting math videos on our channels are as follows :

What are the types of numbers | Natural Numbers | Whole Numbers | Integers | Real numbers | Imaginary numbers | Primary numbers | Composite Numbers
https://youtu.be/T1oDHkpNKok

Multiplication Trick Part 2 | Fast Multiplication | Fast math | Vedic Math trick
https://youtu.be/6yxP3ttnuF0

Divisibility Rule for Prime Numbers | Divisibility rule for 13,17,29,53,89
https://youtu.be/uhJEj2tHiAY

Digit Sum concept | Vedic Math | Fast Calculation | Digital Sum | Competitive exam
https://youtu.be/HgEPpRoN1gc

Percentage Trick | Calculate percentage in Mind | percentages made easy
https://youtu.be/A-hbqm1mJ6Q

Cube Trick | How to find Cube of big Number | 3 digit cube numbers
https://youtu.be/PmORvQyM64Y

Non Perfect Square Root trick | square root calculator
https://youtu.be/P-NxryDnpiE

Divide by zero | Why Division by zero is not allowed | Division by zero
https://youtu.be/m_qKm_ZyQFk

subtraction in mind | subtraction without borrow | fast subtraction
https://youtu.be/-UTa5CK8Nfo

Mental Math Addition | math Addition | addition tricks | Addition in mind
https://youtu.be/vwvBnHUMjis

Japanese Multiplication | Multiply using lines | Multiplication Trick
https://youtu.be/u3KYDwXP2KI

Division trick | Division in mind | Vedic math
https://youtu.be/pjnIGkp0aVU

Square Root in Mind | Square Root Trick | square root calculator
https://youtu.be/Q8sy6Pkace8

Find Cube of Number | Cube Trick | Mind Math | Vedic Math
https://youtu.be/SJ4BY1qITzY

Sum of natural numbers | sum of series | Fast Math | Zero Math | 1+2+3+4+...
https://youtu.be/UNDcOx4lMuQ

Cube Root Trick | Cube Root in Mind | how to calculate cube root
https://youtu.be/EyngAQ4uneU

Multiplication Trick Part 1 | Fast Multiplication | Fast math
https://youtu.be/iMov1CNB624

Square Trick | Square of any Number | Fastest Square trick
https://youtu.be/3kVDz3ohlns

Some of the math puzzles on our channel are as follows :

Find out area of rectangle | Geometry Puzzle | hardest Puzzle | Math riddle
https://youtu.be/bS-EvKsH6RA

camel and bananas puzzle | Math riddle | interview puzzle
https://youtu.be/8zGoARbsg-8

SEND+MORE=MONEY Solution | Crypt arithmetic Problem | Brain Teasers | Math Puzzle

https://youtu.be/Pnxu0vsKBT0

Viral Math Puzzle 2 | IQ test | Find PQR | 2 minute challenge| Math olympiad Puzzle
https://youtu.be/8r5zGFizPww

Viral Math puzzle | IQ test | Math olympiad puzzle | find P,Q,R
https://youtu.be/bS49w8yU3oQ

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Here is another basic counting song for young learners that engages both body and mind!

Your kids get to count from 1 to 10 three times (first slow, then a little faster) while following the little chick's dance steps. This song will provide a quick moment of exercise and relaxation for your kids (and you 😄).

Enjoy!


Don't forget to share this video!

The Singing Walrus creates fun teaching materials, such as kids songs, educational games, nursery rhymes, and kindergarten worksheets (e.g. handwriting worksheets) for parents and teachers. Come and join our community on Facebook, or subscribe to our Youtube Channel!

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**All illustration, animation, music, and voice work produced by The Singing Walrus

Counting by threes is a breeze with this fun song & video! Blast through space as you count all the way from three to sixty! The Counting by Threes song teaches skip counting by 3.

Like our videos? Help support us on Patreon (and access over 50 member-only videos!) ►► https://www.patreon.com/scratchgarden ◄◄

If you are learning to count or teaching math and early years numeracy, the Counting by 3's song by Scratch Garden is the best way to get there!

Watch more Counting Videos from Scratch Garden: https://www.youtube.com/playli....st?list=PL_ym6QHjS1s

Watch many more fun Scratch Garden Educational Videos here: https://www.youtube.com/playli....st?list=PL_ym6QHjS1s

Scratch Garden makes entertaining educational videos for people that like to laugh and learn! Please Subscribe to see more great fun learning videos from Scratch Garden! https://goo.gl/1biPjA


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#scratchgardensongs #countingsongs #countingbythrees

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BabyBus - Nursery Rhymes ► https://www.youtube.com/channe....l/UCpYye8D5fFMUPf9nS
Math Kingdom Adventure Episode: https://www.youtube.com/playli....st?list=PLPA49Pz3BAx

Math Kingdom Adventure 12 | Learn Numbers | Learn Math for Kids | Kids Cartoon | BabyBus
Nursery rhymes in English, canciones en inglés para niños, Comptines en anglais, Lagu-lagu anak berbahasa Inggeris, Musik Untuk Anak, barnvisorna på engelska, Músicas em inglês para crianças, Gyerekzene, Kinderlieder in Englisch, 英文兒歌, Písničky v angličtině, أناشيد أطفال باللغة الإنجليزية, अंग्रेजी में नर्सरी कविताएं, Barnerim på engelsk, Canzoni per bambini in inglese, Engelse kinderliedjes, Piosenki dla dzieci po angielsku, เพลงภาษาอังกฤษสำหรับเด็ก

Kids Cartoon, Мультик для детей, Cartoon d'enfants, Dibujos Animados Infantiles,Desenhos animados crianças, Phim hoạt hình trẻ em, Kartun Anak-Anak, 卡通, 动画, 動畫, การ์ตูนสำหรับเด็ก,Kinder Cartoon, बच्चों कार्टून, Kartun Kanak-kanak, Kinderen cartoon, Barntecknad, الرسوم المتحركة للأطفال
—————BabyBus—————
At BabyBus, our goal is to make learning a fun experience for kids aged 2 - 5 by creating classic nursery rhymes, kids songs and stories with 2D & 3D animations. Children get to learn good habits, safety knowledge, letters, colors, numbers and more by singing and dancing with our characters! Enjoy watching our videos!

BabyBus helps children to:
★ Think Independently
★ Build Self-Confidence
★ Respect Others
★ Explore the World
—————
Contact us:
E-mail: en@babybus.com
Website: http://www.babybus.com

me and the squad went back to first grade for fun

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In this reading lesson, children are expected to learn about stars. This reading lesson is recommended for grade 2 and up level. Children are also expected to answer the questions correctly after reading this paragraph.
#teacherayaonlinetutor #stars #readingcomprehension #teacherayaonlinetutor #dropeverythingangRead #practicereadingenglish #planets #triviaforkids #advancereadinglesson #paragraph

#basicsentences
#readinglessonforbeginners
#readingtutorialforbeginners
#onlinereadinglesson
#practicereadingforkinder
#practicereadingforbeginners
#readingguide
#readingtutorial
#basicsentencesforgrade1
#readingenglishgrade1
#readingenglishgrade2
#readingenglishkinder
#readingenglishsentences
#practicereadingenglish
#englishfortoddlers
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#sentencesstartingwithIhave
#grade1English
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