Answer: rhyolite, eclogite, perovskite, stishovite
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Answer:
You can use the mass-luminosity relation to find the star's lifetime in terms of just its initial mass. The lifetime = mass/luminosity × 1010 years is simply = (star's mass)/[(star's mass)p] × 1010 years = 1/(star's mass)p-1 × 1010 years. Remember that the star's mass is in solar masses.
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Answer:
Direct democracy or pure democracy is a form of democracy in which people decide on policy initiatives directly. The earliest known direct democracy is said to be the Athenian democracy in the 5th century BC, although it was not an inclusive democracy: it excluded women, foreigners, and slaves.
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The geologic time scale (GTS) is a system of chronological dating that classifies geological strata (stratigraphy) in time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events in geologic history.
Scientists use the geologic time scale to illustrate the order in which events on Earth have happened. ... Later, scientists used absolute dating to determine the actual number of years ago that events happened. The geologic time scale is divided into eons, eras, periods, and epochs.
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The capital city of Costa Rica is San Jose.
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