Vocabulary: antinode, compression, displacement, frequency, interference, longitudinal wave,
medium, node, rarefaction, standing wave
Prior Knowledge Question (Do this BEFORE using the
Gizmo.)
In many science fiction
...
Vocabulary: antinode, compression, displacement, frequency, interference, longitudinal wave,
medium, node, rarefaction, standing wave
Prior Knowledge Question (Do this BEFORE using the
Gizmo.)
In many science fiction movies, an evil alien spaceship
explodes with an enormous KABOOM!!
Suppose you were floating in space at a safe distance
from a large explosion such as the supernova at left. Do
you think you would you hear anything? Explain.
_________No you would not hear anything because
there is no medium to transport the
sound__________________________________
___________________________________________
___________________________________________
Gizmo Warm-up
No sounds can be heard in outer space because sound waves
require a medium, such as air, to travel through. Sound waves are
examples of longitudinal waves, or waves in which particles move
back and forth in the same direction as the wave.
You can use the Longitudinal Waves Gizmo™ to explore the
behavior of sound waves. In the Gizmo, an air-filled tube contains
24 evenly-spaced, airtight dividers. To begin, select the Pulsed
waves setting and the Open tube. Set the Strength to 1.00.
Deselect the graph options at lower right.
1. Click Play ( ) to set off the firecracker by the left end of the tube. What do you see?
_________The waves going back and
forth________________________________________________________________
_________________________________________________________________________
2. Do any individual air molecules travel the length of the tube? ________________________
How do you know? __________They do because the dividers don’t block them from going
through _______________
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