It would be B, like charges repel and unlike charges attract.
Using the kinematic equation d = V_0 * t + 1/2 * a * t^2, where d is height you can rewrite this to be d = 1/2*g*t^2 or 4.9t^2
g = a because this is a free fall
d = 1/2 * 9.81m/s^2 * 2.5^2
d = 30.65625m
d = 30.7m
Yes. Copper, mercury, and tin are all used to fill in cavities.
Answer:
its 1/2 the mass of the object times by its velocity ^ 2
