Прочитайте текст и найдите соответствующий перевод подчеркнутого слова. An electric current is a flo...: ответ на тест 912160 - Английский язык

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An electric current is a flow of electricity. There are two kinds of electricity, positive and negative. Glass rubbed with silk is positively charged, ebonite rubbed with fur is negatively charged.
Like charges repel, unlike charges attract. The leaf electroscope is used to detect, distinguish and measure charges.
The ultimate particle of negative electricity is called the electron; that of positive is called the proton.

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An electric current is a flow of electricity. There are two kinds of electricity, positive and negative. Glass rubbed with silk is positively charged, ebonite rubbed with fur is negatively charged.
Like charges repel, unlike charges attract. The leaf electroscope is used to detect, distinguish and measure charges.
The ultimate particle of negative electricity is called the electron; that of positive is called the proton.

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Concorde, the world’s fastest passenger plane, was developed by France and Britain together. 1_______. £1.5 billion was spent on developing Concorde and it was tested for over 5,000 hours, which makes it the most tested plane in history. 2_______. Concorde holds many world records, including the fastest crossing of the Atlantic from New York to London, which was achieved in 2 hours 45 seconds! Flying at twice the speed of sound means that flying time is reduced by half, which is why the Concorde flight between London and New York is used a lot by business people and film stars – you can leave Britain at 10.30 and arrive in New York an hour earlier! 3_______. But there are no plans to build any more. 4_______!

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Engineering is a very practical activity. It is the process of applying the latest achievements of science and technology into practice.
1_______. Mechanical engineers are experts in the design and manufacture of tools and machines. 2_______.
Electrical engineering deals with producing and applying electricity in various fields of national economy. 3_______.
Components and equipment for computing and communicating are the products of electronic engineering. 4_______.

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Bikes, planes and cars have wheels and tyres. Locomotives have wheels; they do not have tyres. Bikes have two wheels and two tyres. Planes have wings. Bikes, locomotives and cars do not have wings. Locomotives, cars and planes have engines. Bikes do not have engines.
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Cars do not have …

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Heat causes liquids to expand. This effect is used in the thermostat in Fig. 21.2. An increase in air temperature causes the liquid to expand in the heat sensor. This expansion causes the valve to close and consequently the flow of hot water is reduced.
After a time, the temperature will go down and consequently the liquid will cool and contract. The spring load will now be greater than the liquid pressure and consequently the valve will open. Once again, the hot water flow is increased.
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Heat causes liquids to …