Английский язык | студенческий
Как читается помогите пожалуйста!
! Everything is made up of atoms.
Each one of them has three particles : protons, neutrons and electrons.
Electrons spin around the centre of an atom.
They have a negative charge.
Protons, which are in the centre of atoms, have a positive charge.
Normally, an atom has as many protons as it has electrons.
It is stable or balanced.
Carbon, for example has six protons and six electrons.
Scientists can make electrons travel from one atom to another.
An atom that loses electrons is positively charged, an atom that gets more electrons is negatively charged.
Перепишите и письменно переведите предложения на русский язык, обращая внимание на перевод оборота there + be и неопределённых и отрицательных местоимений?
Перепишите и письменно переведите предложения на русский язык, обращая внимание на перевод оборота there + be и неопределённых и отрицательных местоимений.
1. There are several sources of energy, some of them are inexhaustible.
2. Are there any foreign languages that you know?
3. There are 14 protons in the nucleus of a silicon atom.
1)определите в каждом из предложений видо - временную форму и залог глагола - сказуемого и подчеркните его (см?
1)определите в каждом из предложений видо - временную форму и залог глагола - сказуемого и подчеркните его (см.
Образец).
Переведите предложения на русский язык.
1. The radar has been used for the automatic control of ground transport.
2. Today plastics are being widely used instead of metals.
3. The construction of the dam has been completed this month.
4. The alloys were experimented upon in our lab.
2) Переведите предложения на русский язык, обращая внимание на разные значения слов it, that.
One. 1.
It is the number of electrons within the atom that determines the properties of a substance.
2. The territory of Moscow is larger than that of London.
3. In London one must get used to the left - side traffic.
Помогите правильно перевести текст пожалуйстаааа и ответить на воапросы?
Помогите правильно перевести текст пожалуйстаааа и ответить на воапросы!
ELECTRIC CURRENT The electric current is a quantity of electrons flowing in a circuit per second of time.
The unit of measure for current is ampere.
If one coulomb passes a point in a circuit per second then the current strength is 1 ampere.
The symbol for current is I.
The current which flows along wires consists of moving electrons.
The electrons move along the circuit because the electromotive force drives them.
The current is directly proportional to the e.
M. f.
160 In addition to traveling through solids, however, the electric current can flow through liquids as well and even through gases.
In both cases it produces some most important effects to meet industrial requirements.
Some liquids, such as melted metals for example, conduct current without any change to themselves.
Others, called electrolytes, are found to change greatly when the current passes through them.
When the electrons flow in one direction only, the current is known to be d.
C. , that is, direct current.
The simplest source of power for the direct current is a battery, for a battery pushes the electrons in the same direction all the time (i.
E. , from the negatively charged terminal to the positively charged terminal).
The letters a.
C. stand for alternating current.
The current under consideration flows first in one direction and then in the opposite one.
The a.
C. used for power and lighting purposes is assumed to go through 50 cycles in one second.
One of the great advantages of a.
C. is the ease with which power at low voltage can be changed into an almost similar amount of power at high voltage and vice versa.
Hence, on the one hand alternating voltage is increased when it is necessary for long - distance transmission and, on the other hand, one can decrease it to meet industrial requirements as well as to operate various devices at home.
Although there are numerous cases when d.
C. is required, at least 90 per cent of electrical energy to be generated at present is a.
C. In fact, it finds wide application for lighting, heating, industrial, and some other purposes = 1650.
Answer the questions : 1.
What is the electric current?
2. Do melted metals conduct current without any change to themselves?
3. Can alternating voltage be changed to operate various devices at home?
4. Does a battery push the electrons in the same direction?
5. What is the alternating current used for?
Помогите перевести текст пожалуйста ?
Помогите перевести текст пожалуйста .
WHAT IS AN ELECTRIC CURRENT?
The question is often asked : "What is an electric current?
" No one has ever seen it.
We only know of the existence of a current owing to its effects.
A current can heat a conductor, it can have a chemical action when passing through a solution, or it can produce a magnetic effect.
We can measure currents by observing their heating, chemical or magnetic effects.
The practical unit of current is called the Ampere.
Two things are necessary to cause an electric current to flow : first - a complete circuit, and second - a driving force called the electromotive force (e.
M. f.
). If you put free electrons on an insulated copper ball, what would they do?
In this case they would try to repel each other.
In case you connected this charged ball to another ball of equal size by a copper wire, what would be the result?
The electrons would move along the copper wire until the numbers of electrons on each ball were the same.
This is an example of electromotive force causing a current to flow.
A battery has a surplus of electrons on one of its two plates ; so you say that a battery furnishes an e.
M. f.
If a copper wire is run from one plate to the other, а current flows in the complete circuit thus made.
If a small bulb is placed in the circuit, it will light up, giving evidence to a current flow.
If the battery were disconnected and a generator substituted for it, we should have a typical lighting system.
Both batteries and generators are the most common sources of electromotive force.
The practical unit of e.
M. f.
Is the Volt.
Currents will flow more readily in some substances than in others, that is, various substances offer lesser or greater resistance to the flow of current.
Such substances as porcelain, ebonite, rubber, glass and the like having extremely high resistance are known as insulators.
The practical unit of resistance is the Ohm.
Substances whose properties lie between those of conductors and insulators are called semiconductors.
Let us name but a few most widely used at present, they are germanium, silicon, selenium and copper oxide.
The importance of semiconductors in our life cannot be overestimated.
But for these tiny "workhorses" electronic industry would not have achieved such a great progress.
Найти глагол сказуемое и определить его видовременную форму 1?
Найти глагол сказуемое и определить его видовременную форму 1.
The number of electrons in atom depends on the kind of atom.
ЗАДАТЬ 5 ВОПРОСОВ по ниже предоставленному предложениюAll electrons have an electric charge?
ЗАДАТЬ 5 ВОПРОСОВ по ниже предоставленному предложению
All electrons have an electric charge.
ПЕРЕВЕДИТЕ ПЛЕЗ, ТОЛЬКО НОРМАЛЬНОWHAT IS AN ELECTRON?
ПЕРЕВЕДИТЕ ПЛЕЗ, ТОЛЬКО НОРМАЛЬНО
WHAT IS AN ELECTRON?
What is an electron?
It is a very small, indivisible, fundamental particle – a major constituent of all matter.
All electrons appear to be identical and to have properties that do not change with time.
Two essential characteristics of the electron are its mass and its charge.
Qualitatively, an electron is a piece of matter that has weight and is affected by gravity.
Just as the mass of any object is defined, the mass of the electron can be defined by applying a force and measuring the resulting rate of change in the velocity of the electron, that is, the rapidity with which its velocity changes.
This rate of change is called acceleration, and the electron mass is then defined as the ratio of the applied force to the resulting acceleration.
The mass of the electron is found to be about 9.
11 10 - 28 grams.
Not only the electron but all matter appears to have positive mass, which is equivalent to saying that a force applied to any abject results in acceleration in the same direction as the force.
How does the other aspect, the charge of the electron, arise?
All electrons have an electric charge, and the amount of charge, like the mass, is identical for all electrons.
No one has ever succeeded in isolating an amount of charge smaller than that of the electron.
The sign of the charge of the electron is conventionally defined as negative ; the electron thus represents the fundamental unit of a negative charge.
Вставьте вместо пропущенных точек слова приведенные ниже?
Вставьте вместо пропущенных точек слова приведенные ниже.
Let us begin by saying that anything man 1.
About the atom today might be changed tomorrow.
Science constantly 2.
New things about the atom as atom - smashing machines 3.
The word "atom" comes from greeks 4.
An atom to be the 5.
Possible particle of any substance.
Yet today we 6.
More than 20 different particles in the core of the atom!
Scientists believe the atom 7.
Of electrons , protons , neutrons, positrons, neutrino, mesons and hyperons .
How all these particles 8.
Together to make up the atom still 9.
To us.
Know
Learn
Build
Think
Small
Find
Make
Hold
Not know.
Составить предложения ?
Составить предложения .
1)defined losing been oxidation has as The a lot of electrons.
2)solvents chemical polar divided depending on their compositions solvents are into and non - polar.
3)the processes ion of recognized engineering exchange is now one of chemical.
Составьте предложенияa) a union of, two, a molecule, be, may, more, or, atoms?
Составьте предложения
a) a union of, two, a molecule, be, may, more, or, atoms.
B) atom, hydrogen, every, has, proton, one, a nucleus, of.
C) the, of, nucleus, the negative, electron, charge, neutrolizes, charge, the
positive, the.
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Читається дуже легко якщо потрібен переклад ось :
Все состоит из атомов.
Каждый из них имеет три частицы : протоны, нейтроны и электроны.
Электроны вращаются вокруг центра атома.
У них отрицательный заряд.
Протоны, находящиеся в центре атомов, имеют положительный заряд.
Обычно атом имеет столько протонов, сколько у него есть электроны.
Она стабильна или сбалансирована.
Углерод, например, имеет шесть протонов и шесть электронов.
Ученые могут заставить электроны путешествовать от одного атома к другому.
Атом, который теряет электроны, заряжен положительно, атом, который получает больше электронов, отрицательно заряжен.