The beginning of a river is called the
mouth
source
watershed
tributary

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 statement best describes the direction of the buoyant force on any object? a. opposite the force of gravity b. in the same direction as the weight c. in the direction of motion of the object d. opposite the direction of motion of the object

Being able to see a square in the middle of the image despite not having lines to form a square represents the gestalt principle of a. proximity b. similarity c. closure d. continuity