I need help with this physics question. Please help!

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

See the attachment and solve question 5th

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)