Ans is <span>A.musical note
the others are beyond audible range of human ear
</span>
Explanation:
Oxygen - 65.0%
Carbon - 18.5%
Hydrogen - 9.5%
Nitrogen - 3.2%
Calcium - 1.5%
Phosphorus - 1.0%
Potassium - 0.4%
Sulfur - 0.3%
Sodium - 0.2%
Chlorine - 0.2%
Magnesium - 0.2%
Others < 1.0%
The above is the elements present in the human body. They compose of almost all the 20 first elements on the periodic table. The first 20 elements are seen on all sides of the periodic table.
Q is the heat added to the system.
