D. How Much Energy Comes From A Bond Breaking.
Without what values please be more specific
Vs - velocity on beginning
ve - velocity on ending. You've got:

So he needed 4 second.
<span>The Earth’s orbit is a nearly circular ellipse.
</span><span>The Sun is located at one of the two focal points.</span>
The Earth moves around the Sun in an orbit that is almost but not quite circular. As Kepler proved in the seventeenth century, the orbit is actually an ellipse. A parameter called the eccentricity (e) defines the degree of departure from a circle. A value of e=0 would indicate a circle whereas a value of e=0.9 would indicate a very elongated ellipse. The eccentricity of the Earth's orbit is currently e=0.0167.
Factors Affecting the Rate of Erosion<span>. The biggest factor affecting coastal </span>erosion<span> is the </span>strength<span> of the waves breaking along the coastline. A wave's </span>strength<span> is controlled by its fetch and the </span>wind speed<span>.</span>