Friday, July 26, 2013
Thursday, May 9, 2013
Wednesday, May 8, 2013
lesson for science group
Chapter 1 Physics & TEST
Conceptual Premises:
Mastering Units:
·
The SI Unit is
considered an internationally accepted unit of measurement. To be more
accurate, it is considered a unit adopted for international use under the
Système International d'Unités in science and technology. The seven fundamental
units are the meter, kilogram, second, ampere, kelvin, candela, and mole.
·
Meter:
is denoted by symbol m which is the measure of distance / displacement.
·
Second:
is 60th of minute or a unit of time that is equal to 1/60th of a minute and its
symbol is s.
·
Kg
or kilogram is the measurement of mass and denoted by symbol kg.
·
Ampere:
is SI unit of electric current: the
basic unit of electric current in the SI system, equal to a current that
produces a force of 2x10-7 newton's per meter between two parallel conductors
in a vacuum. Its symbol is A.
·
Degrees
kelvin: is a unit of temperature measurement.
When we take a close look on this, we come to know that it is the unit of
absolute temperature i.e. the SI unit of absolute temperature, equal to
1/273.16 of the absolute temperature of the triple point of water, equivalent
to one degree Celsius. A temperature in kelvin may be converted to Celsius by
subtracting 273.16.its symbol is K.
·
There are also some complex
items that are included in this category such as velocity and acceleration. Velocity represents the rate of change in position i.e. the rate
of change in the position of an object as it moves in a particular direction.
And acceleration denotes the measure
of increase in velocity i.e. a measure of the rate of increase in the velocity
of something per unit of time.
·
Few things are
generally expressed in derivatives
that represent the change of function or the limit approached in the ratio of a
function and its variable, as the variable is changed ever more infinitesimally.
For example, in physics, Force is
generally represented by symbol F and considered as influence that moves
something i.e. a physical influence that tends to change the position of an object
with mass, equal to the rate of change in momentum of the object. But for
convenience, its normally measured in the derivative unit Newton N Where
few important derivatives are also shown
in the following table as well.
·
Newton
is the term that is used to describe the unit of force. To be more accurate, it
is considered an SI unit of force equivalent to the force that produces an
acceleration of one meter per second per second on a mass of one kilogram.
Symbol is N.
·
Energy
is described in physics as capacity to do work: the capacity of a body or
system to do work. Symbol is E. and Joule
is unit of energy or the International System unit of energy or work, equal to
the work done when the application point of a one newton force moves one meter
in the direction of application. Symbol is J.
·
The Power is described as the measure of
rate of doing work. It is in fact the measure of the rate of doing work or
transferring energy, usually expressed in terms of wattage or horsepower.
Symbol is P. and Watt is the unit of
electrical power especially the international SI unit of power equal to the
power produced by a current of one ampere acting across a potential difference
of one volt. Symbol is W.
·
The Charge is referred as electric property
of matter or a fundamental characteristic of matter, responsible for all
electric and electromotive forces, expressed in two forms known as positive and
negative. Charge is also referred in physics as an excess or lack of electrons
or a quantity of electricity caused by an excess or lack of electrons. And coulomb is referred as a unit of
electric charge or the SI unit of electric charge equal to the amount of charge
transported by a current of one ampere in one second. Symbol is C.
·
The Potential is referred as the work
required to move an electric charge. It is in fact the work required to bring a
unit of positive electric charge from infinity to a specific point in an
electric field. Symbol is V. and Volt
is described as unit of electric potential difference. In other words the unit
of electromotive force and electric potential difference equal to the
difference between two points in a circuit carrying one ampere of current and
dissipating one watt of power. Symbol is V.
·
The Resistance can be described in many
ways. It is described as the force opposing another force: a force that opposes
or slows down another force with Symbol Rr. It can be described as opposition
to electric current or the opposition that a circuit, component, or substance
presents to the flow of electricity with Symbol R. It is also written as source
of resistance or something that is a source of opposition to the flow of
electricity, e.g. a resistor with Symbol R. and Ohm is the unit of electrical resistance. It is indeed the SI unit
of electrical resistance, equal to the resistance between two points on a
conductor when a potential difference of 1 volt produces a current of 1 ampere.
Symbol is Ω.
·
The Capacitance is termed as ability to store electric charge or the
ability of a substance to store an electric charge. You can describe it as the ability
of component to store charge especially the ability of an electronic component
to store an electric charge. It is in fact the measure of electric charge
storage i.e. a measure of the capacitance of a substance, equal to the surface
charge divided by the electric potential. Symbol is C. and Farad is the unit of electrical capacitance. It is in fact the SI
unit of capacitance equal to that of a capacitor carrying one coulomb of charge
when a potential difference of one volt is applied. Symbol is F.
·
The Magnetic Field is defined as the magnetized
region of space especially a region of space surrounding a magnetized body or
current-carrying circuit in which the resulting magnetic force can be detected.
And Tesla is termed as the unit of
magnetic flux density. It is in fact the derived unit of magnetic flux density
in the SI system, equal to a flux of one weber in an area of one square meter.
Symbol is T. it is worth mentioning here that magnetic flux density is the strength of magnetic field in medium
or the strength of a magnetic field multiplied by the porosity of a medium,
measured in teslas or gauss. Symbol is B.
Friday, April 12, 2013
Monday, March 18, 2013
TREE PLANTATION
TREE PLANTATION
Trees are very useful for men in various important ways. They provide us wood and many products. They give us shade. Trees keep the soil strong. Trees save us floods and many other natural calamities. Trees prevent the rise of temperature. They give us oxygen. They prevent the rise of carbon dioxide worldwide. Tree gives us food and shelter. They make the land fertile. They save our house from cyclone. Trees protect us from the heat of sun. Many trees give us fruits. Tree helps to cause rain. Tree gives shelter to birds and animal. Trees are things of beauty too. We can take care of trees by not cutting them. We can also take care of trees by planting them more and more. We should plant trees more and more for our happy, better and healthy life.
Trees are very useful for men in various important ways. They provide us wood and many products. They give us shade. Trees keep the soil strong. Trees save us floods and many other natural calamities. Trees prevent the rise of temperature. They give us oxygen. They prevent the rise of carbon dioxide worldwide. Tree gives us food and shelter. They make the land fertile. They save our house from cyclone. Trees protect us from the heat of sun. Many trees give us fruits. Tree helps to cause rain. Tree gives shelter to birds and animal. Trees are things of beauty too. We can take care of trees by not cutting them. We can also take care of trees by planting them more and more. We should plant trees more and more for our happy, better and healthy life.
Saturday, February 16, 2013
Most Important Aplication For Class 6 To 10
Suggestions sheet
Sub: English Application
12 April 2012
The Headmaster
Y. school. Jessore
Subject : Remission of delay fine.
Sir,
I beg most respectfully to state that I am a regular student of your school. My father went to India three month before for treatment. For that reason I could not pay my tuition fee for the month of February, March, April. So my name has been stuck off from the roll for the non payment of dues. Now my father has come back. So I am in a position to clear off all the dues.
I, therefore, pray and hope that you would be kindly remit the delay fines and receive the usual fees only.
I remain
Sir,
Your most obedient pupil,
A
Roll : 1
Class:8
12 April 2012
The Headmaster
Y. school. Jessore
Subject : Prayer for a seat in the school hostel.
Sir,
I beg most respectfully to state that I am a regular student of your school. My is a Government employee. Recently he has been transferred from Jessore to Khulna . our family has already shifted there. I have no relation in this city. So I need a seat in our school hostel to continue my study properly.
I therefore, pray and hope that you would be kindly give me a seat in the school hostel.
I remain
Sir,
Your most obedient pupil,
A
Roll : 1
Class:8
12 April 2012
The Headmaster
Y. school. Jessore
Subject : Prayer transfer certificate.
Sir,
I beg most respectfully to state that I am a regular student of your school. My is a Government employee. Recently he has been transferred from Jessore to Khulna . our family has already shifted there. I have no relation in this city. So it is impossible for me to continue my study in your school. So I am badly needed of a transfer certificate.
I therefore, pray and hope that you would be kind issues me the transfer certificate.
I remain
Sir,
Your most obedient pupil,
A
Roll: 1
Class: 8
12 April 2012
The Headmaster
Y. school. Jessore
Subject : Leave of absence for a week..
Sir,
I beg most respectfully to state that I am a regular student of your school. My father works in Singapore. In a lucky draw, he has won a Dhaka-Singapore-Dhaka ticket with three days, he has sent the ticket for me. If I am granted leave, I would be able to join him by the end of September.
I therefore, pray and hope that you would be kindly grant my prayer .
I remain
Sir,
Your most obedient pupil,
A
Roll : 1
Class:8
Most Important And Easy Dialogue For Class 6 to 10
Suggestions sheet
Sub: English Dialogue.
DIALOGUE BETWEEN DOCTOR AND PATIENT
Patient : Good evening doctor. Will you spend some time for me?
Doctor : Of course. What’s your problem?
Patient ; my exam is very near. I cannot work hard because I have been suffering from difficult problem.
Doctor : What’s the problem?
Patient : I have been suffering from weakness.
Doctor : Do you go to bed late hours at night?
Patient : Yes. I study more at night.
Doctor : Please lie down on the bed. I will check you.
Patient : Check me well sir.
Doctor : Don’t worry you’re OK. Take rest for seven days. Go to bed early at night and take regular exercise.
Patient : Thank you very much.
Doctor : You are most welcome.
DIALOGUE BETWEEN YOU AND THE BANK MANAGER
Myself : May I come in, sir?
Manager : Yes come in. please be seated.
Myself : Thank you.
Manager : How can I help you?
Myself : I want to open an account with your bank. What to do?
Manager : You have to open a savings account. Here is an application form. You have to fill it in and be introduced by someone who has an account with us.
Myself : That’s all?
Manager : No. here is a signature card. You have put your signature on this card and attach two passport size photographs.
Myself : I see. I will come back as soon as. Thanks for your help.
Manager : You’re welcome.
DIALOGUE BETWEEN YOU AND YOUR FRIEND ABOUT TREE PLANTATION
Anis : Hello Rakib how are you?
Rakib : Fine, and you?
Anis : Same to you. Please tell me the necessity of tree plantation.
Rakib : Trees are our best friends. They are a great source of food and vitamins
Anis : That’s all?
Rakib : Trees give us shade and shelter, wood, oxygen. They save us from flood and many other natural calamities. Trees make the land fertile.
Anis : What should we do them?
Rakib : We should plant trees more and more for our happy, better and healthy life.
Anis : Thank you.
Rakib : welcome.
HEADMASTER AND STUDENT
Student : May I come in sir?
Headmaster : Yes, what do you want?
Student : I have come from Chittagong. I am seeking admission into your school.
Headmaster : Why have you left Chittagong.
Student : My father is a Government employee. He has been transferred to here.
Headmaster : Which class do you like to take admission?
Student : Class 9 (science group)
Headmaster : H you bought your T.C.
Student : Yes sir.
Headmaster : Well I will consider your case. Meet me tomorrow.
Student : Thank you sir.
Headmaster : Most welcome.
ABOUT PREPARATION FOR EXAM
Amin : Good evening, habib.
Habib : Good evening, how are you?
Amin : well, but I am afraid of the exam.
Habib : Have not you completed your course?
Amin : My preparation in English is not so well.
Habib : Don’t worry I am sure you will be able to cover it. How is your preparation in mathematics?’
Amin : Well, I am afraid in English
Habib : English is difficult for all. Try your best.
Amin : Thank you for your suggestion. Practice mathematics’ more and more.
Habib : Thank you.
ABOUT IMPORTANCE OF LEARNING ENGLISH
Amin : Hello, habib what are you doing?
Habib : I am reading an article about the importance of learning English.
Amin : English is an international language.
Habib : Now it is very essential for all.
Amin : It is essential for get higher education.
Habib : It helps a man to get a good job and earn more money.
Amin : It is the official or semi official language more than 60 countries.
Habib : You are right.
Amin : The importance of English cannot be described in words.
Habib : So, all of us must learn English.
ABOUT ROAD ACCIDENT
Jamil : Hi anil, why are you looking so sad.
Anil : The news of the death of all members of a family in a road accident made me sad
Jamil : Really it is very sad. Everyday we find much accident news in news paper.
Anil : Can you tell me the reason of it.
Jamil : Rough driving, lack of traffic police, overloaded vehicles are main causes of it.
Anil : The roads are not good in many points. That also causes road accident
Jamil : What can be done to reduce road accident?
Anil : Drivers should be given training.
Jamil : Well planned roads should be constructed.
Anil : People should be made aware of traffic rules.
Jamil : Thank you for your discussion.
Anil : you are welcome.
BOOK SELLER AND CUSTOMER
Seller : Good morning, may I help you please?
Customer : Yes, I want to buy some books.
Seller : What type of books do you want?
Customer : I want story books for children.
Seller : There are many popular children story books in my shop.
Customer : Please show some of them.
Seller : OK, here are these books.
Customer : How much?
Seller : Five hundred Tk only .
Customer : Here is the money.
Seller : Thank you, please visit us next time.
Customer : you are welcome.
Most Important And Easy Paragraph For Class 6 to 10
Suggestions sheet
Sub: English paragraph
TRAFFIC JAM
Traffic jam is a long line of vehicles that cannot move or that can only move very slowly because there is so much traffic in the road. Traffic jam is a common affair in the big cities and towns. it is one of the major problem of modern time. The cause of Traffic jam is many. Mainly our roads are not enough increased. The roads are all the same. There are many unlicensed vehicles which should be bought under control. The drivers are not willing to obey the traffic rules. Overtaking tendency is also causes Traffic jam. The number of traffic police is insufficient. At office time traffic jam is intolerable. Sometimes Traffic jam is so heavy that it blocks about half a kilometer. It kills our valuable time and our work is hampered. It causes great sufferings to the ambulance carrying dying patient and the fire brigade vehicles. However this problem can be solve by adopting some measures. Spacious road should be constructed. Traffic rules should be imposed strictly so that the drivers are bound to obey them. Sufficient traffic police should be posted on important points. Unlicensed vehicles should be removed. After doing all this we can hope to have a good traffic system for our easy and comfortable movement.
A WINTER MORNING
A winter morning is misty and cold. There is dense fog everywhere. Sometimes the fog is so dense that the sun rays cannot get through it. The cow and other animals cannot come out. Village children and people have hardly warm cloths. They gather dry leaves to make fire to warm themselves. The old and the poor bask in the sun in order to warm themselves. People in general and children get up late. So everyone is busy in taking breakfast, dressing, and getting ready to go their workplace. In a winter morning one can enjoy delicious and sweet cakes, date juice and many other foods. A winter morning is enjoyable in many respects.
STREET HAWKER
A street hawker deals in various things by hawking from street to street. He carries his products on head or in hand and sometimes in a small handcart. He generally buys his goods in a cheaper rate and sills them at a good profit. A street hawker is very cunning. He knows his business very well. His customers are women and children. He brings toys, sweets and other things for children. He also brings ribbons, cloth, fruits, fancy goods and domestic uses for women and sells them at a good profit. He speaks in different ways to draw the attention of his customers. A hawker also knows the time of his business. He comes when housemasters are out of home and when women are free from their household works and duties.
VILLAGE MARKET
A village market is an important place to the villagers. The villagers buy and sell their daily goods in a village market. A village market generally sits in an open place of the village. Usually A village market is divided into three section-open place, temporary shops and permanent shops. Vegetable, milk, fruits, fish, curry and other things are sold in the open space. From the grocers people buy oil, salt, onion, garlic etc. in the permanent shops cloths, shoes, wheat, rice, flour, ghee and different stationary items are sold. A village market is very important to the villagers. The villagers sell their own products and buy their daily necessaries. It saves time and money of the villagers.
A book fair
Book fair is an exhibition of books. Now a day’s book fair has become very popular. It has created a sense of interest for books. All shorts of books-fictions, text books, dramas, children books are displayed there. There are also food and drink stalls. A book fair become crowd especially in the evening. Both male and female customers gather in a book fair. The writers also visit the fair regularly. The book fair reminds us that books are our best companions. They are always at our side when we fall in danger. They change our outlook. We get these best friends at a cheaper rate from a book fair.
Load shedding
Load shedding means the discontinuation of supply of electricity. Load shedding occurs when production of power is less than demand and also unplanned distribution of power. It creates a serious problem in the economic development of a country. The running houses, mills, industries, hospitals all fall a victim to it. Domestic life becomes painful. The sufferings of the students due to load shedding beggar description. The patient also suffers terribly for load shedding. The food kept in the refrigerators gets rotten. Load shedding causes a great suffering to the people. In order to solve this problem we have to produce sufficient electricity. We should be conscious to using the electricity.
TEA STALL
A tea stalls a common sight in our country. It is found in towns, cities, bazaars, railway station, bus stands even in village. It is a small shop. In a tea stall there are few chairs, tables or benches. Prepared tea is sold here. Biscuits, cakes, bananas are also sold here. There is often a boy or two to serve the tea. An ordinary tea stall is dirty. A kettle is always kept hot on the stove. A tea stall opens in the morning and closes late night. A tea stall is a popular place. People of different ages and classes come here. They take tea and talk with one another. They talk about village politics, national and international politics, and current affairs. A tea stall is an important place for people.
TREE PLANTATION
Trees are very useful for men in various important ways. They provide us wood and many products. They give us shade. Trees keep the soil strong. Trees save us floods and many other natural calamities. Trees prevent the rise of temperature. They give us oxygen. They prevent the rise of carbon dioxide worldwide. Tree gives us food and shelter. They make the land fertile. They save our house from cyclone. Trees protect us from the heat of sun. Many trees give us fruits. Tree helps to cause rain. Tree gives shelter to birds and animal. Trees are things of beauty too. We can take care of trees by not cutting them. We can also take care of trees by planting them more and more. We should plant trees more and more for our happy, better and healthy life.
YOUR SCHOOL MAGAZINE
A school magazine is a magazine that contains the writings of the teachers and the students of a school. Almost every well established school publishes it every year. It contains poems, articles and short stories. The publication of a school magazine is a very difficult task. The editors have to work hard to publish it. The school magazine is an important things for students. A student fell proud when he find his writing in print. The students can learn many things from it. The school also reflects academic and co curricular activities of the school. In a word school magazine is the mirror of a school.
WATER POLLUTION
WATER pollution means the ways in which the water is polluted. Water is an important element for human environment. It is essential for human, plants and other life. Water can be polluted by many ways. Farmer use fertilizer and insecticide in their fields. The rain and flood wash away some of these. They get mixed with safe water. Mill and factories pollutes water by throwing their waste. Steamer, motor launch pollute water by throwing oil, food waste, human waste etc. unsanitary latrines also pollute water. Safe water is safe for us and polluted water is harmful. So we should be conscious to prevent this problem.
Friday, February 15, 2013
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