A) the tension in the string.
The hydropower plant and wind turbines both uses kinetic energy to produce mechanical power and convert the mechanical energy using a generator to an electrical energy. They both have the process to produce energy but they differ in the source the hydropower plant uses water to whit the wind turbines power plant uses wind. Therefore the answer is letter B.
To solve this problem we will use the basic concept given by the Volume of a sphere with which the atom approaches. The fraction in percentage terms would be given by the division of the total volume of the nucleus by that of the volume of the atom, that is,
![\% Percent = \frac{V_{nucleus}}{V_{atom}}*100](https://tex.z-dn.net/?f=%5C%25%20Percent%20%3D%20%5Cfrac%7BV_%7Bnucleus%7D%7D%7BV_%7Batom%7D%7D%2A100)
![\% Percent = \frac{4/3 \pi (d_{nucleus}/2)^3}{4/3 \pi (d_{atom}/2)^3}*100](https://tex.z-dn.net/?f=%5C%25%20Percent%20%3D%20%5Cfrac%7B4%2F3%20%5Cpi%20%28d_%7Bnucleus%7D%2F2%29%5E3%7D%7B4%2F3%20%5Cpi%20%28d_%7Batom%7D%2F2%29%5E3%7D%2A100)
![\% Percent = \frac{(d_{nucleus}/2)^3}{ (d_{atom}/2)^3}*100](https://tex.z-dn.net/?f=%5C%25%20Percent%20%3D%20%5Cfrac%7B%28d_%7Bnucleus%7D%2F2%29%5E3%7D%7B%20%28d_%7Batom%7D%2F2%29%5E3%7D%2A100)
![\% Percent =\frac{(1.0*10^{-14}/2)^3}{ (1.1*10^{-10}/2)^3}*100](https://tex.z-dn.net/?f=%5C%25%20Percent%20%3D%5Cfrac%7B%281.0%2A10%5E%7B-14%7D%2F2%29%5E3%7D%7B%20%281.1%2A10%5E%7B-10%7D%2F2%29%5E3%7D%2A100)
![\% Percent = 7.51*10^{-13}*100](https://tex.z-dn.net/?f=%5C%25%20Percent%20%3D%207.51%2A10%5E%7B-13%7D%2A100)
![\% Percent = 7.51*10^{-11}\%](https://tex.z-dn.net/?f=%5C%25%20Percent%20%3D%207.51%2A10%5E%7B-11%7D%5C%25)
Therefore the percent of the atom's volume is occupied by mass is ![7.51*10^{-11}\%](https://tex.z-dn.net/?f=7.51%2A10%5E%7B-11%7D%5C%25)