Answer:
When your mom walks in the room, lol. I don't see a "figure A"
:D
Answer: Period T = 4.44secs
Explanation: see attachment
In a perfectly ELASTIC collision between two perfectly rigid objects <span>both the momentum and the kinetic energy of the system are conserved.hope it helps</span>
A, Mechanical and A, Chemical.
Answer:
its the sound that a heart produces when beating, this can help doctors detect abnormalities