Hi :) If your answers choices are what I'm thinking, the answer is two :)
Answer:If a bouncing ball has a total energy of 20 J and a kinetic energy of 5 J, the ball’s potential energy is 15J.
If the kinetic energy of the ball decreases, then the potential energy will Increase.
Explanation:
Answer:
the percentage yield of Cu(NO3) 2 is 40%
Copper is reshaped, but its molecular structure does not change.