Geography, 05.09.2020 19:01 marilynlaraaa
Planetary Nebula/White Dwarf Stars – Little Ghost Nebula. Some red giant stars develop into planetary nebulas as their cores continue to contract, to increase in temperature, and to burn and vent the remaining gases into interstellar space. Eventually, the core collapses to the point where it is hot enough to ionize the vented gases, forming a relatively short-lived (~10,000-20,000 years) planetary nebula. The remaining core collapses into a white dwarf star. The vented materials from the planetary nebula play an important role in enriching the universe in elements with atomic weights less than 26 (forming the basis for carbon-based life like ourselves!). Which type of star will form a planetary nebula? Choose one: high-mass star (greater than 8x the mass of our Sun) intermediate- to low-mass stars (between 0.8x to 8x the mass of our Sun)
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Geography, 22.06.2019 09:30
Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.
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Geography, 22.06.2019 13:30
How does the parallax of a nearby object compare to that of an object farther away?
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Why did macarthur want to invade china? why did truman oppose this?
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What type of aid does nigeria receive? short term, tied, voluntary, bilateral, multilateral or long-term?
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Planetary Nebula/White Dwarf Stars – Little Ghost Nebula. Some red giant stars develop into planetar...
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