Waves in Mediums

Roughly what is the speed of sound in air?

• About 350 m/s

• About 1 500 m/s

• About 5000 m/s

• About 1800 m/s

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Sound waves travel the fastest in

• solid

• liquid

• gas

• vacuum of empty space

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Light waves travel the slowest in

• solid

• liquid

• gas

• vacuum of empty space

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If a sound waves moves from a solid to a liquid, the sound wave will

• speed up

• slow down

• not change speed

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If a sound waves moves from a gas to a liquid, the sound wave will

• speed up

• slow down

• not change speed

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If a light waves moves from a gas to a liquid, the light wave will

• speed up

• slow down

• not change speed

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If a light waves moves from a solid to a liquid, the light wave will

• speed up

• slow down

• not change speed

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If the sun's light travels from the atmosphere into the ocean, the speed of the sun's light wave will

• increase

• decrease

• stay the same

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The aluminum allows the sound wave to travel faster than air at 68 degrees because the molecules in aluminum are closer together.

• This statement is true because solids are more dense than gases. Mechanical waves require a medium. The closer the molecules are, the quicker they can transfer the sound wave.

• This statement is true because solids are less dense than gases. Mechanical waves require a medium. The closer the molecules are, the quicker they can transfer the sound wave.

• This statement is true because solids are more dense than gases. Mechanical waves do NOT require a medium. The closer the molecules are, the quicker they can transfer the sound wave.

• This statement is true because solids are more dense than gases. Mechanical waves do NOT require a medium. The farther apart the molecules are, the quicker they can transfer the sound wave.

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Light waves travel the fastest in

• solid

• liquid

• gas

• vacuum of empty space

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