Answer:
The core turns its hydrogen to helium and stops nuclear fusion which causes the outer shells of hydrogen to collapse.
Explanation:
This results in higher temperature and pressure which in turn causes the outer shells to expand and cool as a red giant.
A theory is only accepted if it can't be disproven. A theory uses science, which is experimental data transformed into reality. A theory is more than an idea. It uses proven laws of physics and accepted standards.
Answer: The correct option is A.
Explanation: In a chemical reaction, reactants react to form a number of products.
For the formation of products, the bonds of the individual reactants must be broken and the bonds of the products must be formed.
For example: Formation of water from hydrogen gas and oxygen gas. Reaction follows:
![2H_2(g)+O_2(g)\rightarrow 2H_2O(l)](https://tex.z-dn.net/?f=2H_2%28g%29%2BO_2%28g%29%5Crightarrow%202H_2O%28l%29)
The Bonds of hydrogen and oxygen molecule are broken and new bonds between hydrogen and oxygen atoms are formed to give water molecule.
The answer is B
If one circuit fails, it is most likely that all the components in the circuit will fail.
Answer;
Active transport
Explanation;
Movement of solute from a 0.2% solute concentration solution to a 0.4% solute concentration solution is an example of active transport.
-Active transport is the process by which dissolved molecules move across a cell membrane from a lower to a higher concentration. In active transport, particles move against the concentration gradient - and therefore require an input of energy from the cell.
-During active transport, a protein pump uses energy, in the form of ATP, to move molecules from an area of low concentration to an area of high concentration.