Which one statement below is true? select one: o a. when an em wave enters a new medium, its wavelength stays the same and its frequency changes. o b. light travels more slowly in glass than in air. o c. the electric and magnetic fields oscillate at different frequencies in an em wave o d. dispersion only occurs for the visible range of the em spectrum.
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Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide? kg • what must the total momentum of the system be after the train cars collide? kg •
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Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?
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Which one statement below is true? select one: o a. when an em wave enters a new medium, its wavel...
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