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Identify the true statement. a. A fifth-generation star would have a smaller proportion of heavier elements than would a second-generation star. b. An accretionary disk eventually grows hot and massive enough to become a protostar, then a star. c. Our Universe is so old that there are no first-generation stars left in it. d. Dense regions of a nebula pull in surrounding material and therefore rotate slower.
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Identify the true statement. a. A fifth-generation star would have a smaller proportion of heavier e...
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