Assignment: Vocal Cords

Assignment: Vocal Cords
Assignment: Vocal Cords
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10. The Sun is going down, and most of the land is dark, but we can see silhouettes and outlines of objects because some light is still _____ the atmosphere.
absorbed in
reflected by
transmitted through
scattered by
11. Obi Wan uses his Jedi mind tricks to compel people to do his will. The words he uses begin in his vocal cords which _____ the air molecules in his throat.
reflect
refract
absorb
vibrate
12. Han and Greedo fire their blasters at each other. The blasts are loud, and the intensity of the sound spreads through the cantina following the _____.
Conservation of Momentum
Inverse Square Law
Ohm’s Law
Newton’s Third Law of Momentum
13. The sound strikes the cantina walls and bounces off at the same angle as it struck in a process known as _____.
reflection
refraction
constructive interference
destructive interference
14. Obi Wan hears the destruction of a planet and all of its people through ‘the force’. These sounds are only in his head and are not carried through space, since space has no _____ through which sound could transmit.
electromagnetic wave
electrons
magnetic field
medium
15. However, had it been a real sound, the sound’s pitch would have been increased by the Doppler Effect, since the Falcon was moving _____ the source of the sound.
perpendicular to
away from
towards
at the same speed as
16. The communications of the ship were made inoperable by electromagnetic waves sent by the Death Star that were completely out of phase with attempted communications causing _____.
reflection
refraction
constructive interference
destructive interference
17. Vader’s light saber is red, while Obi-Wan’s light saber is blue, meaning that Obi-Wan’s light saber is emitting _____ compared to Vader’s light saber.
lower energy light waves
higher energy light waves
the same energy light waves
more sound waves
18. You are standing 10 meters from a light source. Then, you back away from the light source until you are 20 meters away from it. From your perspective, what has happened to the intensity of the wave?
It has decreased by a factor of two.
It has increased by a factor of two.
It has decreased by a factor of four.
It has increased by a factor of four.
19. You are standing 100 meters from an object emitting a sound of constant intensity (loudness). You walk toward the source of sound until you are 20 meters from it. From your perspective, what has happened to the intensity of the sound?
It has decreased by a factor of five.
It has increased by a factor of five.
It has decreased by a factor of twenty-five.
It has increased by a factor of twenty-five
20. The Inverse Square Law applies to:
Intensity of Sound
Gravitational Force
Intensity of Light
Electric Force
Magnetic Force

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