18. Complex Sentences (Zero “that”- clause).

I. Translate the sentences with zero that- and which- clauses:

A. Kurchatov understood it was considerably easier to use the nuclear chain reaction for destruction than for the production of energy used for homes and factories. He was sure there was a way to control this reaction and release it in small doses and he found it. We know his ideas helped the development of thermonuclear research.

B. 1. A few pounds of uranium 235 can supply a medium – sized town with all the electricity it needs during a whole year.

2. The atomic weight of an atom is the number of protons and neutrons it contains.

3. The phenomenon Roentgen discovered is widely used in medicine.

4. This is a type of reaction you will easily understand.

5. One of the problems I. Kurchatov worked at was the problem of mastering controlled thermonuclear reactions.

6. Einstein gave an entirely new idea of the world we live in.

7. The problem we are dealing with is very important for our laboratory.

8. The substance they had to work with had unpleasant odour.

9. That portion of mechanics we dealt with at our last lesson is known as statics.

10. Today we know atoms are neither unchangeable nor indivisible.

11. The material the apparatus is made of is a good non-conductor of heat.

12. It is known one horse power equals 746 watts.

13. The rate a machine does work at is measured in horse power or kilowatts.

14. Every engineer knows the units of work are important and depend upon the units chosen for force applied and distance moved.

15. Heat is the energy a body possesses owing to the fact that its molecules are in motion.

16. Substances that transform the energy they absorb into light without becoming heated, are called luminofores, and the light they radiate – luminescence.

17. The action of the force pressure depends not only on its value, but also on the area of the surface it acts upon.

18. The mineral the scientist was working with for a number of years was uranium and its compounds.

19. All the data the magazine referred to are based on the experiments carried out in our laboratory.

20. The particles all the different atoms consist of are neutrons, protons and electrons.

II. Analyze the following sentences and translate them:

1. An alternating current flows provided an alternating voltage source is applied to the circuit.

2. Transformers are also used to step down the voltage at the receiving point of the line to the low values that are necessary for use.

3. If the readings of an ammeter are observed simultaneously with the millivoltmeter readings, it is easy to calculate the corrections for current variations.

4. There is a special kind of connection of a relay responsive to overload which has already been met with in the preceding chapter.

5. Examining the network we see each relay is connected to similar secondary terminals of 2 current transformers.

6. That the discovery of radioactivity has led to finding out the structure of the atom is quite evident.

7. Very few of the robots we have talked about up to now have looked like men.

8. As the ionospheric wave leaves the transmitting antenna, it starts traveling and reaches a region called the ionosphere.

9. A computer is given a complete set of ready-made instructions on how to do given job.

10. It was realized the atom must contain a tremendous amount of energy.

11. The heat scientists calculated will be more than enough to heat a pound of water from freezing to boiling.

12. If this signal controls a specific interval of time before an action takes place, the circuit is a time-delay circuit.

13. The thyratron begins conducting each time the grid voltage exceeds the critical voltage.

14. The point at which grid voltage exceeds the critical voltage occurs later.

This means electric power may be transmitted over considerable distances with negligible losses without the use of transmission lines.