Once massive stars reach the red giant phase, the core temperature continues to increase as carbon atoms are formed from the fusion of helium atoms. Gravity continues to pull together the carbon atoms in the core until the temperature reaches 600,000,000 degrees Celsius. At this temperature, carbon atoms form heavy elements such as oxygen and nitrogen. The fusion and production of heavy elements continues until iron starts to form. At this point, fusion stops and the iron atoms start to absorb energy. This energy is eventually released in a powerful explosion called a supernova. A supernova can light the sky up for weeks. The temperature in a supernova can reach 1,000,000,000 degrees Celsius. This high temperature can lead to the production of new elements which may appear in the new nebula that results after the supernova explosion. The core of a massive star that is 1.5 to 4 times as massive as our Sun ends up as a neutron star after the supernova. Neutron stars spin rapidly giving off radio waves. If the radio waves appear to be emitted in pulses (due to the star's spin), these neutron stars are called pulsars. The core of a massive star that has 10 or more times the mass of our Sun remains massive after the supernova. No nuclear fusion is taking place to support the core, so it is swallowed by its own gravity. It has now become a black hole which readily swallows any matter and energy that comes too near it. Some black holes have companion stars whose gases they pull off. As the gases are pulled down into the black hole, they heat up and give off energy in the form of X-rays. Black holes are detected by the X-rays which are given off as matter falls down into the hole.
Answer:
the circulatory helps move hormones and other things through your body
Explanation:
have a good rest of ur day
Answer:
False
Explanation:
Even though the idea is logical, Earth's seasons are actually caused by the tilt of earth,earth rotating on it's axis, and Earth's revolution around the sun
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One land form starting with the letter z is Zeals Knoll located in England.
The political action surrounding the location of federal nuclear waste dump sites in the US, can best be described as having a concentrated costs and widely dispersed benefits.
- Politics is a category of activities that are related to group decision-making or other types of power dynamics between people, such as the allocation of resources or status.
- The federal government has been forced to pay utility companies to keep its hazardous nuclear waste since it has not built a permanent depository. The majority of nuclear waste is currently kept in dry casks on the grounds of active and retired nuclear power stations around the nation.
- The Yucca Mountain project's goals are to meet the requirements of the Nuclear Waste Policy Act of 1982 and provide a national repository for high-level radioactive waste and spent nuclear fuel.
To learn more about Nuclear Waste.
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