LAWS OF MATTER 451 



26. What causes the strange feeling when an elevator starts to 

 descend quickly? 



27. When the ink does not start from out a fountain pen easily, 

 what may we do? Why? 



28. Why is it necessary to start an automobile on low gear? 



29. How is it possible for a pitcher to " curve a ball "? 



30. Why does snapping a cloth remove the water? 



31. Do you beat the dust out of a carpet or the carpet away from 

 the dust? Why? 



32. Why do we write so unevenly while riding in a street car 

 or train? 



33. Why does the world keep turning? 



34. Which way would an automobile tip over going around a 

 curve; to the inside or outside of the curve? 



35. Which way would you lean in riding around a curve in an 

 automobile? Why? 



36. Is the outside or inside rail on a curve of a railroad banked? 

 Why? 



37. Why does dodging help a hare to escape a hound? 



38. If two cars met head on going at different rates of speed 

 the occupants of which car would receive the greater injuries? 



39. Is there any truth in the statement that it is not the fall- 

 ing any great distance but the stopping quickly that does the 

 injury? Why? 



40. Why are we not aware of the rapid motion of the earth? 



41. Why is it possible to pass over a piece of thin ice quickly, 

 whereas stopping for a moment will cause the ice to break? 



42. Why does a rotary sprinkler rotate? 



43. Why does a garden hose which is not straight twist and turn 

 when the water is turned on? 



44. What would happen if the world suddenly stopped re- 

 volving? 



45. Why does the air remain on our earth? 



46. Why do the bubbles in a cup of cocoa or tea gather on the 

 side? 



47. If an apple falls from a tree does the earth move toward 

 the apple? 



