Different parts of living things work together during respiration. oxygen enters the nose and follows the path to your lungs. cilia keep the oxygen that moves into your lungs clean. next alveoli allow oxygen from the air to pass into your blood. all of these parts working together create a very important process for humans. what is this process called? a)digestion b)evolution c)reproduction d)respiration

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?