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The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?
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Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?
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Apatient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasnāt healed in a long time. what vitamin deficiency most likely caused this symptom?
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What is the term for splitting white light in to the different colors of light?...
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