304 REVIEW. 



8. (a. ) What will be the momentum of a ball weighing two ounces 

 after falling 4| seconds ? (&.) A stone weighing 20 Ibs. on the sur- 

 face of the earth, would weigh how much at an elevation of 2000 

 miles from the surface ? 



9. Define (a.) wave length ; (&.) wave period ; (c.) amplitude of 

 vibration ; (d.) phase of a vibrating particle. 



10. (a.) What would be the effect of making a small hole at the 

 highest point of a siphon in action ? (ft.) What effect upon the action 

 of a siphon would be produced by carrying it up a mountain? (c.) 

 What effect would follow if the atmosphere were suddenly to be- 

 come denser than the liquid being moved ? 



11. Describe (#.) a complete soundwave and (&.) its manner of 

 propagation, (c.) How does the transmission of sound through a 

 smooth tube differ from its transmission through the open air ? 



12. Give the laws for pressure of liquids and explain each by 

 some fact or experiment. 



13. (a.) Distinguish clearly between noise and music. (&.) What 

 is meant by timbre ? (c.) By pitch ? 



14. (a.) Give three examples of musical sounds that agree in one 

 and differ in two elements or characteristics, making a different 

 element agree each time. 



15. Give three examples of musical sounds that differ in one and 

 agree in two elements, making a different element differ each time. 



16. (a.) What are sympathetic vibrations ? (6.) How may they be 

 produced ? (c.) What are beats ? (d.} How may they be produced? 



17. (a.) What is Archimedes' Principle ? (&.) How is it applied in 

 finding the specific gravity of a solid ? 



18. How much water per hour will be delivered from an orifice of 

 2 inches area 49 feet below the surface of a tank kept full ? 



19. Describe the telephone. 



20. (.) Describe the electrophorus. (6.) Explain its action. 



21. (a.) Describe an organ pipe, (b.) Make a reed pipe. 



22. (a.} Explain the charging of the Leyden jar ; (6.) when charged 

 what is the electric condition of the outside and inside of the jar ? 



23. (a.) A body falls for six seconds ; find the distance traversed 

 in the last two seconds of its fall. (6.) How far will a body fall in 

 fa of a second beginning at the end of four seconds ? (c.) Explain 

 the ''kick "of a gun. 



24. (a.) Show that if, in an Attwood's machine, one weight be f 

 as heavy as the other, its increment of velocity will be that of a 

 freely falling body. (6.) That if the lighter weight be f of the 

 heavier, its increment of velocity will be g. 



