The figure below depicts the evolution in chemical composition of the Sun's interior at three different times during its life.How do the relative percentages of hydrogen and helium change at a fractional radius of 0.1 solar radii, from the time the Sun formed until it exhausts its core supply of hydrogen in 5 billion years? 
Definitions:
Reflected Sounds
Sounds that are echoed or bounced off surfaces, altering the perception of the sound source.
Absolute Pitch
The ability to identify or reproduce a musical note without the need for a reference tone.
Intermediate-Frequency
A frequency range that lies between the high frequency and low frequency bands, often used in radio frequency applications.
High Frequencies
Sound waves that have a very short wavelength and are typically perceived as high-pitched sounds.
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