1. Clouds are formations of condensed water vapour.

2. Water vapour condenses to form clouds.

3. No paint is impermeable to water vapour.

4. Water vapour in the air condenses into fog.

5. But water vapour is also a greenhouse gas.

6. Or will more water vapour feed the warming process?

7. It must also provide a high level of water vapour resistance.

8. Incidentally, cavity wall insulation should be impermeable to water vapour[Sentencedict], or interstitial condensation can occur.

9. But it found that anything that produces water vapour - unvented tumble driers, for example - pushed up damp levels significantly.

10. Snow crystals form when atmospheric conditions turn water vapour into ice.

11. The amount of water vapour in a battery depends on the concentration of sulphuric acid in the solution.

12. Such gases, mixed with water vapour, were subjected to electrical discharge and ultraviolet light.

13. Humidification: Addition of water vapour to air.

14. This causes more and more water vapour to condense.

15. Users now can calculate the permeance of water vapour.

16. The dropwise condensation (DWC) of water vapour has been achieved on the ultra thin poly(HFP) film coated on copper tube surfaces which has been prepared by the technique of plasma polymerization.

17. When water changes to water vapour, we say it evaporates.

18. Bubbles of water vapour formin the blood and travel through the circulatory system, obstructingblood flow.

19. A cloud is a condensation of water vapour in the atmosphere.

20. Water vapour and clouds are the primary variables modulating direct solar absorption.

21. The platinum catalyses the reaction of carbon monoxide and hydrocarbons with air to give carbon dioxide and water vapour.

22. Both ordinary and thermal plasterboard are also available with a backing film which makes it resistant to water vapour.

23. Furthermore, the particles act as nuclei for droplets of water vapour.

24. Comets are easy to find because they are bright, being surrounded by vast clouds of water vapour.

25. A porous polymer membrane bag seals the electrolyte, allowing water vapour, but not the acid solution, to pass.

26. Any decline in water loss might also be partly offset by the resulting increase in atmospheric water vapour pressure deficit.

27. Water vapour is a naturally occurring greenhouse gas but the amount of water vapour in the atmosphere is affected by human activities.

28. On the Earth there is regularly more evaporation - effusions of water vapour from the surface - by day than by night.

29. Dongguan MTAPAC Damp-proof Packing Co. , ltd is a water vapour proof packing technique company which sets development, design, production and sales as one.

30. Results showed that composite material had good biological defence property and water vapour transmission rate. Biological clothing had a reasonable structure.

1. Clouds are formations of condensed water vapour.

31. In addition, the test also assessed the degree of comfort of the sleepwear by means of air permeability and water vapour permeability.

32. The ground effective radiations are calculated based on the ground temperature. air temperature. water vapour pressure and total cloud cover.

33. The water vapour transport in oasis is enhanced through downdraft in terrain, making the climatic effect in oasis of mountain valley to enhance as well.

34. When water vapour changes to water, we say that it condenses.

35. Water vapour in gas condensate reservoir has effect on the phase state condensate system.

36. To allow the water vapour to escape from the crucible.

37. In this paper, method of calculation for pumping of water vapour gas ballast pump is introduced.

38. Whereas refrigerative systems reduce the humidity of air (because some water vapour condenses and is drained away), evaporative coolers increase humidity.