According to the conservation of mechanical energy, the kinetic energy just before the ball strikes the ground is equal to the potential energy just before it fell.
Therefore, we can say KE = PE
We know that PE = m·g·h
Which means KE = m·g·h
We can solve for h:
h = KE / m·g
= 20 / (0.15 · 9.8)
= 13.6m
The correct answer is: the ball has fallen from a height of 13.6m.
It is salt water because they are two things combined together.
Answer:
it is B
Explanation:
Because I agree with her and also got 100
Answer:
I think it will back towards the earth because earth gravitional field will attract to Wards
I think the answer is CuF2