The first positively essential requirement is that
you absolutely have to know what 'a' and 'b' are.
I have no clue, so this is as far as I can go.
Answer:
yes this is truly the wrong answer
Infrasound sound is any sound that are below the sound a human can hear, elephants use it to communicate with other elephants.
28J because mechanical energy is the sum of the potential energy and kinetic energy
Acceleration = (change in speed) / (time for the change)
Change in speed = (end speed) - (start speed) = (15 m/s - 7 m/s) = 8 m/s
time for the change = 2 minutes = 120 seconds
Acceleration = (8 m/s) / (120 seconds)
Acceleration = 0.067 m/s²
