_____ are glass tubes surrounded by concentric layers of glass,

  1. _____ are glass tubes surrounded by concentric layers of glass, called “cladding,” to form a light path through wire cables.
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  2. There is an apparatus that consistsw of three glass bulbs connected by small glass tubes with the stopcocks closed. Given that
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  3. _____(1) _____ are made by heating sand silica until it melts into a liquid state. The melted glass can then either be shaped by
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  4. luminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective
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  5. There is an apparatus that consists of three glass bulbs connected by small glass tubes with the stopcocks closed. Given that
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  6. There is an apparatus that consists of three glass bulbs connected by small glass tubes with the stopcocks closed. Given that
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  7. Aluminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective
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  8. Aluminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective
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  9. Aluminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective
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  10. Aluminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective
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