Review exercise

1. There is no question of anything solid or liquid or living surviving on the incandescent surface of the sun. 2. A negative ion is one which has gained an electron. 3. Our old laboratory equipment was much worse than the new one. 4. We shall replace the old machines by new ones. 5. This method is the one which is much spoken about. 6. We found new routes of synthesis, the older ones being unsatisfactory. 7. This process is the one to be associated with reaction in alkaline solution. 8. One can make matter vibrate in different ways. 9. Due to radioactive elements one can measure the thickness of various materials. 10. One should pay more attention to the use of artificial satellites for communication. 11. The more one learns the more one knows. 12. One spent much time in cooling the mixture. 13. One can never say that the decision was the best possible solution to the problem. 14. The following example indicates the main features to be considered when one decides whether to use correlation or spectral analysis for a particular problem. 15. The optimum temperature for cotton is higher than that for the smaller grains. 16. The measured optical constants are therefore those associated with the ordinary ray. 17. We again see that the period of oscillation is the same as that of the forced oscillation. 18. These corpuscles have either no electric charge and mass, or at any rate a charge and mass negligible as compared with those of the electrons, minute as the latter are. 19. Their emission spectrum whether excited by light or by alpha particles is quite different from that of pure luminescent zinc-sulphate, the colours being green and blue respectively. 20. The pressure does not lower. If it did, it would indicate that...

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