That the total energy of an isolated system remains constant and is said to be conserved over time
<span>After the fields were sprayed for beetles corn borers increased because their natural predator was gone. The beetles had been keeping the corn borers at bay but once their natural predator had been eradicated the corn borers were protected and flourished.</span>
Because, gravity and friction, gravity will pull ball down and friction gonna slow down ball. Also wind resistance and probably a lot of more, like geometry of ball.
We know, Speed = Wavelength * Frequency
Speed = 32.4 * 3
Speed = 97.2 m/s
So, option D is your correct answer.
Hope it helped.
