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1. :

1. What laws did Newton discover?   2. n u formulate the Law of Universal gravitation? Newton' s great discovery was the law of decomposition of 1ight. The scientist proved that the white light of the sun is composed of rays of light of ll colours of the rainbow. also discovered the Law of Universal Gravitation.   The Law of Universal Gravitation states that "every particle of matter is attracted b every other particle of matter with force inversely proportional to the square of their distance apart".  

 

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ISAAK NEWON

3. Newton's great discovery was the law of decomposition of light. The scientist proved that the white light of the sun is composed of rays of light of ll colours of the rainbow. also discovered the Law of Universal Gravitation which states that "every particle of matter is attracted b every other particle of matter with force inversely proportional to the square of their distance apart".   4. Newton applied the principle of gravitation to prove that the power which guides the mn around the earth and the planets around the sun is the force of gravity. Another application of the law of universal gravitation was Newton's exploration of the tides.   3. . , . , , .   4. , , , . .  

 

3. :

1. Newton (was performed, performed) many experiments with light.     2. When Cambridge (was closed, closed) in 1662, Newton returned to his native village.   3. Mass (is measured, measured) in grams or kilograms. Newton performed many experiments with light. .     When Cambridge was closed in 1662, Newton returned to his native village. 1662 , .   Mass is measured in grams or kilograms. .

 

 

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1. My parents want me to become a chemist.   2. He is believed to be a very talented person.   3. Newton is considered to be one of the greatest English scientists. , .   , .   , .

 

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1. carry out this experiment will take you a lot of time. ()   2. The experiment to be carried out in our laboratory is very important. ()   3. He forgot to register the results of the experiment. () .   , , .   .  

 

6. - Past Indefinite Tense ( ), can, may, must :

1. must work hard to finish his experiment.   2. I can devote myself to scientific work.   3. You may repeat your experiment. He had to work hard to finish his experiment.   I could devote myself to scientific work.   You might repeat your experiment.

 

7. some, any, no:

1. The Metric System has (some, any, no) advantages over the English System.   2. Do you remember (some, any, no) facts from Newton's biography?   3. The young engineer had (some, any, no) experience in such work. The Metric System has some advantages over the English System.   Do you remember any facts from Newton's biography?   The young engineer had no experience in such work.

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The two most common types of engines are the petrol engine and the diesel engine. Petrol engines are lighter and smaller than diesel engines. That makes them cheaper, and that is why most cars and motorbikes use petrol engines.

On the other hand, diesel engines use less fuel and last longer than petrol engines. They are also safer and less dangerous. They are widely used in large vehicles such as trucks and trains.

 

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1. The engine (cooled, is cooled) by water from the radiator.

The engine is cooled by water from the radiator.

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2. Most cars (use, are used) petrol engines.

Most cars use petrol engines.

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3. The electricity (stored, is stored) in the battery.

The electricity is stored in the battery.

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1. Rudolf Diesel is known to be the inventor of the diesel engine.

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2. We expect them to buy a new car.

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3. This motor car is considered to be safe.

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