Solar System questions (NEED ANSWERS ASAP)?
Here are the questions I need ACCURATE answers to.
1. Describe the scale of the solar system.
2. Using this scale, how far away is the closet sun outside our solar system?
3. What percent of our solar system's mass is in the sun?
4. What element make up the sun?
5.What are the most common elements in other stars?
6. What are the most common elements in the universe?
7.which type of nuclear reaction occurs in stars?
8. Where does this reaction take place?
9. Which type of nuclear reaction is done in nuclear power plants on earth
10. What is the formula for determining the energy released by nuclear reactions?
- RaymondLv 78 years agoFavorite Answer
All this information is easy to find.
1) The unit we use is the astronomical unit (AU). 1 AU is the average distance between the Sun and the Earth. At that scale, Pluto's orbit is roughly 39 AU in radius and the entire Solar system, including the Oort cloud, is very roughly around 50,000 AU.
2) "Sun" is the name of our star. There is no other "Sun" in the universe. However, there are other stars, and the closest one outside the Solar system is roughly 4 light-years away, putting it at 250,000 AU.
3) In the high nineties
4) Hydrogen, helium and a pinch of everything else. The "tiny" proportion of iron, for example, is three times the mass of planet Earth.
5) Same. The older the star, the less there are of elements beyond hydrogen and helium.
6) hydrogen and helium
7) During their "normal life" hydrogen gets fused to helium. This is what is presently going in inside our Sun. It has been going on for 5 billion years and should continue for roughly another 5 billion years.
8) In the core, where pressure and temperature is at maximum.
9) In fission plants, uranium or plutonium atoms split apart, releasing energy. In some experimental fusion planets, hydrogen is fused onto helium (same as inside stars).
10) This would require a whole page. However, I suspect that what you are looking for is E = m c^2
Whenever a nuclear reaction takes place and releases energy, it is because some mass (m) disappears during the reaction.