Determine the potential difference between two charged parallel plates that are 0.50 cm apart and have an electric field strength of 9.0 v/cm.

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)