A 70 kg diver standing on a diving platform seizes 35,000 j of pe how high is the platform

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

Which is an advantage of subdividing science into different areas?