REVIEW. 367 



11. (a.) To what temperature should a liter of oxygen at C. be 

 raised in order to double its volume, the pressure remaining con- 

 stant ? (&.) Give reasons for your answer. 



12. (a.) What is meant by the boiling point of a liquid ? (6.) State 

 some circumstances that cause it to vary. 



13. A kilogram each of water, iron and antimony, at 0C. are 

 heated ten minutes by the same source of heat, and are then found 

 to be 1 C., 9 C. and 20 C. respectively. Required the specific heat 

 of each. 



14. (a.) Define latent heat. (&.) Describe a method of determining 

 the latent heat of water, (c.) Describe the cooling and freezing of 

 a lake. 



15. (a.) If 2 kilograms of water should be suddenly stopped after 

 falling 212 metres, how much heat would be generated? (b.) 

 Describe the essential parts of a steam-engine. 



16. (a.) How many cubic feet of water will be displaced by a boat 

 weighing two tons ? (b.) How many of salt water of sp. gr. 1.09 ? 

 |c.) How does a noise differ from a musical sound ? 



17. The sp. gr. of alcohol is .8 ; that of mercury 13.6. When a 

 mercury barometer indicates a pressure of 30 inches, what will be 

 the height of an alcohol barometer column ? 



18. (a.) Describe the ordinary force-pump ; (b.) explain the use of 

 its essential parts. 



19. (a.) Give the formulas for changing thermometric readings 

 from F. to C., and vice versa, (b.) Explain the graduation of two 

 kinds of thermometers, (c.) Define increment of velocity. 



20. (.) What is distillation, and upon what fact does the process 

 depend? (&.) What is latent heat? (c.) Illustrate the conversion 

 of sensible into latent heat, (d.) On what does the pitch of sound 

 depend ? 



21. (a.) Define boiling and boiling-point. (b.) What is the rate of 

 expansion for gases ? (c. ) Will water boil at a lower temperature 

 at the sea level or on the top of a mountain ? Why ? (d.) What 

 constitutes the timbre of a sound ? (e.) Give the formulas for the 

 wheel and axle. 



22. (a.) If the pressure remain the same, how much will 546 cu. cm. 

 of hydrogen expand when heated from C. to 10 C. ? (b.) How 

 mnch work may be performed by a ball weighing 64.32 Ibs., moving 

 with a velocity of 50 ft. per second ? (c.) When has water the 

 greatest density ? 



23. Show that to raise the temperature of a pound of iron from 

 C. to 100 C. requires more energy than to raise seven tons of iron 

 a foot high. 



