Speed of Waves in Different Media

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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Steel is a very dense solid, but when I compare the steel at 32 degrees, I see that it travels a little slower than the steel at 68 degrees.

• Heat has no effect on how fast or slow molecules move.

• This is true because the heat causes the molecules to vibrate a bit slower.

• This is true because the heat causes the molecules to stay still a bit longer.

• This is true because the heat causes the molecules to vibrate a bit faster.

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When comparing sound traveling through the air, I can tell from the chart, it travels faster at 1,127 ft/sec because...

• the temperature is 68 degrees, which means the molecules are able to transfer the waves faster.

• the temperature is 32 degrees, which means the molecules are able to transfer the waves faster.

• the temperature is always the same for air, so the temperature does not make a difference

• air is a gas that is spread out and allows the sound waves to travel through it faster

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In which medium do sound waves travel the fastest?

• Solid

• Liquid

• Gas

• Vacuum

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When a light wave moves from air to water, what happens to its speed?

• Increases

• Decreases

• Remains the same

• Becomes zero

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