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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.

Apply Divisibility Rules in Problem Solving

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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.

WEBSITE: http://www.teachertube.com Part 2 of 4 How do you add subtract multiply and divide complex numbers in polar modulusargument form? What is De Moivres Theorem? How does it apply to complex numbers?

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The (truly) Periodic Table is an animated film that tells you everything you ever wanted to know about the Periodic Table: why it has this shape, how the elements are organized, how they combine or ... not really!

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What is a noun? | Nouns for Kids | How to teach nouns | Noun Forms | Nouns in English | Learn English

Welcome to our video about nouns for kids! In this video, we'll be exploring what nouns are and how they are used in language.

Nouns are words that represent people, places, things, or ideas. They are one of the parts of speech, along with verbs, adjectives, and adverbs.

There are several types of nouns, including common nouns and proper nouns. Common nouns are general names for people, places, things, or ideas, such as "dog," "table," and "school." Proper nouns are specific names for people, places, or things, such as "Samantha," "London," and "Mount Everest."

Nouns can be singular or plural, depending on whether they refer to one thing or multiple things. To form the plural of a noun, you can add -s or -es to the end of the word, or you can change the spelling in some cases.

Nouns can also be classified as concrete nouns or abstract nouns. Concrete nouns are nouns that represent things that you can touch, see, or feel, such as "ball" or "tree." Abstract nouns are nouns that represent ideas, feelings, or qualities, such as "happiness" or "beauty."

Nouns are an important part of language, as they help us to name and refer to people, places, things, and ideas. We hope that you've enjoyed learning about nouns! They are a fundamental part of language and communication.

In addition to common and proper nouns, there are also collective nouns, which are nouns that represent a group of people or things. Examples of collective nouns include "team," "flock," and "class." Collective nouns can be singular or plural, depending on the context in which they are used.

Nouns can also be possessive, which means that they show ownership or possession. To form the possessive of a noun, you can add an apostrophe and -s to the end of the word, or you can just add an apostrophe if the noun is already plural.

For example, the possessive form of the singular noun "dog" is "dog's," and the possessive form of the plural noun "cats" is "cats'."

It's important to use nouns correctly in language, as incorrect usage can change the meaning of a sentence. It's also important to be aware of the different types of nouns and how they are used in order to improve your language skills.

We hope that you've enjoyed learning about nouns! They are a crucial part of language and are used to represent people, places, things, and ideas.
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What is 1234 + 5673? and what is 6831 + 1238?
Adding two numbers using the digits from left to right is much faster than adding up from right to left. In this lesson, I am telling you how to do it. If you practice this more, you can improve your addition speed. Let's do fast addition and quick calculation. Learn with fun!

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