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What variables may affect the drop time of a parachute?
The size of the parachute, the surface area of the parachute, the drop height, the weight of any attached objects, the material of the parachute, the airflow in the room, the temperature in the room, the amount of individuals in the room, the level of oxygen in the room, the length of the parachute cord, the materials used in the parachute cord and the shape of the parachute may all affect the drop time.