V final = (Mass x V initial) + (Mass x V initial) /m + m
V = (0.04 x 300) + ( 0.5 x 0 ) / 0.04 + 0.5
V = 22.2 m/s
I'm guessing the answer is a
The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left.
The answer is called Scope. Hope this helps.
Answer:
potential energy
Explanation:
Work changes potential and kinetic energy. When you throw a ball, you transfer energy to it and it moves. By doing work on the ball, you can give it which is the energy of motion. Any moving object has some kinetic energy.
