III. Define the meanings of the suffixes in the following words and translate them:

oscillation — oscillatory — to oscillate — oscillator — oscillating — oscillated;

to deflect — deflector — deflected — deflecting,

to convert — conversion — converter — converting — converted;

constant — constantly;

to receive — receiver — reception — receiving — received;

to transmit — transmitter — transmission — transmitting — transmitted;

to measure — measurer — measuring — measured — measurement — measureless — measurably — measurable;

to lose — losing — lost — loss — lossless; to depend — dependent — dependence — depending upon — independent — independence; long — length — to lengthen;

equal — unequal — equality — unequality — equally — unequally — to be equal to.

IV. Translate the following noun-groups:

transmitter parts; pendulum speed; energy losses; travel speed; oscillatory circuits operation; maximum pendulum deflection.

V. Give synonyms to the following words:

work, motion, full, vibration, to send, velocity, to travel, to grow, to start, to transfer.

VI. Give antonyms to the following words:

low, unimportant, to send, to be at rest, unnecessary, to grow, to decrease, to find, to start,

dependent, equal.

VII. Use the Future Indefinite Tense in the following sentences:

1. You speak English well. 2. Does he work at his English hard?

3. My friend does not get up at 6 in the morning (a. m.) every day.

4. You must help them to do this work.

5. She can make this experiment well.

6. They took part in that conference.

VIII. Ask all possible questions on each sentence.

1. We shall discuss an interesting problem at the meeting tomorrow. 2. In a month they will come to see us: 3. Last week he saw his friend at the bus stop. 4. You may answer these questions orally. 5. We meet these engineers here every day.

IX. Read the following passage and say what it is about:

If the oscillatory systems of radio devices are linear the pendulum can be considered as a linear system. It is true only when the oscillations are small. That's why we shall consider the oscillations of the pendulum to be small.

Laboratory work 6

Ex. I. Listen and repeat the following words and word-groups, translate them into Russian:

1. a circuit; 2. high frequency; 3. a radio transmitter; 4. a radio receiver; 5. in order to understand; 6. to operate; 7. operation; 8. to analyze; 9. a pendulum; 10. to release; 11. position; 12. complete; 13. only half of it; 14. the maximum deflection,

15. the zero position; 16. a distance; 17. the amplitude; 18. per second; 19.a measure; 20. a period; 21. to propagate; 22. properties; 23. to damp; 24. to decrease; 25. to increase; 26. as a result of; 27. harmonic character; 28. energy losses; 29. sinusoidal;

30. to depend upon; 31. the length; 32. to continue; 33. constant; 34. the mechanical energy; 35. the potential energy; 36. the kinetic energy; 37. ,is equal to; 38. at that moment; 39. the speed of its travel; 40. to grow; 41. to pass through; 42. while; 43. the pendulum speed; 44. conversion.