The correct option is B.
Stars live out most of their lives at MAIN SEQUENCE. Stars generally are divided into three major stages, these are:
1. Pro stars and pre-main sequence star
2. Main sequence and giant star
3. Variable stars
Major stages in the life of a star can last for millions of years.
Answer:
You may need better soil and a more plentiful amount of water coming from another source, and maybe find another way to contain the rain water
Explanation:you may need to draw it on paper sorry bout how it looks
The chemical name is ferric oxide or iron (III) oxide or hematite. We can found it naturaly as a magnetite, mineral.
Answer:
544.522 Hours
Explanation:
a) Mass = 12.5 kg = 12500 g
Now, Number of moles is given as
No of moles = Mass of Cr / Molar mass of Cr

= 240.38 moles
3 mols of electrons are required

Converting moles of e- to coulombs of charge, (1 mol of electrons = 96500 C )
Q =721.14 mol×96500 C/mol
=69590010 of charge
We know that, Q = I×t
where Q is charge, I is current and t is time required.


=196281.97 seconds

=544.522 Hours