Exercise- 10th Science 1, 5. Heat

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1. 10 (100 - T) = 195 (T - 20) + 5 (T - 20)  Then T = ? 

2. Define specific heat.

3. Define dew point.

4. Define regelation.

5. What is the difference between heat and temperature?

6. The anomalous behaviour of water can be studied with ......  apparatus.

7. The relative humidity at the dew point is ..... %.

8.  If temperature of air is 40 °C, it can contain ...... grams of water vapour per kilogram of dry air without condensation.

9. The units of heat are ....... in SI units, cal (calorie) in cgs units.

10. Specific heat of water is ...... cal/g  °C. 

11. Write formula of relative humidity.

12. Write ‘Principle of heat exchange’.

13. The constant temperature, at which the ice converts into water is called the ..... point of ice.

14. What are the different ways of heat transfer?

15. The vapour content in the air is measured using a physical quantity called ...... 

......  .

16. Ex: How much heat energy is necessary to raise the temperature of 3 kg of water

from 30 °C to 90 °C.

17. Write relation between Calorie and Joule.

18. The moisture in the atmosphere is called ....... .

19. At 4 °C, the volume of water is ......  . It means that the density of water is maximum at 4 °C.

20. Define - Specific latent heat of fusion.

21. Define relative humidity.

22. Define one kcal heat.

23. If the relative humidity is more than 60% we feel that the air is ....... . 

24. (80 × (97-0) × 1) = ? 

25. The specific heat capacity is denoted by letter ‘...... ’.

26. Generally absolute humidity is measured in .......  .

.27. R × 80 = 80 × 637   R= ?

28. If the relative humidity is less than 60%, we feel that the air is .... .

29. Draw fig. of Hope’s Apparatus.

30. Define - specific latent heat of fusion.

31. Define one cal heat.

32. The SI unit of specific heat is ..... / kg °C, and the CGS unit is cal / g °C.

33. Explain the following temperature versus time graph.

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उदा. खालील शब्दांचा रंग.

          

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