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Your room is still fairly dark when you wake up early one morning. you look over at your shirt hanging on a hook. you know it's your red shirt because you hung it up there before you went to bed, but in the dark you can't see its color. it looks dark gray to you. why is that?

70 ! in 2-3 paragraphs of 250-300 words, compare and contrast parallel and relative keys. give clear definitions and specific examples to support your answer.

Which of the following is a type of technology that can be used at a coal-burning power plant to remove both particulate matter and gases? bag filter catalytic converter cyclone electrostatic precipitator scrubber