1. describe what is needed to form longitudinal standing wavesin a slinky and how they are formed.

2. what is the difference between a longitudinal wave and astanding longitudinal wave. how are standing waves formed?

3. explain how sound waves are propagated through air. are theselongitudinal or transverse waves?

4. describe the motion of individual air molecules at a node and atan antinode. compare this to the motion of the individual springcoils at nodes and antinodes when a standing wave is produced in aslinky.

5. what is the effect of changing the frequency of the sound? doesit change the velocity of the wave? does it change thewavelength?

6. describe the motion of the individual air molecules at a nodeand at an antinode. compare this to the motion of the individualspring coils at nodes and antinodes when a standing wave isproduced in a slinky.

7. what is the effect of changing the frequency of sound. doesit change the velocity of the wave? does it change thewavelength?

8. a person who has just inhaled helium gas speaks with a highpitched voice. discuess why this happens given that your larynx andother parts of you respiratory passage act rather like a resonancetube with you vocal chords producing the necessary energy tovibrate the air.