You need to move the decimal point between the six and nine. 6.9 X 10^-4
Mira is much bigger than the Sun.
Only very massive stars will go through a supernova stage, causing the outer layer to explode away and the core to collapse in on itself, becoming very dense.
The answer would be center of mass, B
Answer:

Explanation:
We need to find the energy for an electron to jump from n = 1 to n = 4.
The energy in transition from 1 state to another is given by :

The difference in energy for n = 1 to n = 4 is:

So, the required energy is equal to
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Velocity<span> is a</span>vector<span> quantity; it is direction-aware.</span>