Answer:
13.33 or 13 1/3m/s (meters per second)
Explanation:
In physics, we use the basic units of meters and seconds. So first convert (km) into meters (m) and also hours and minutes into seconds (s). We end up with 120000m and 9000s. Then divide the 120000m by the 9000s and you end up with 13.33 or 13 1/3 m/s.
Mechanical waves transfer energy by inducing vibrations in the propagation medium.
F=m*a
F=65 kg *9.8 m/s^2
F=637 N (Newtons) — this is the weight
