Final answer:
Blowing up a balloon and releasing air through a bent straw demonstrates Newton's Third Law of Motion, where the balloon will move in the opposite direction to the escaping air due to conservation of momentum.
Step-by-step explanation:
When you blow up the balloon and bend your straw to a 45° angle before allowing the air to escape, you are conducting a simple physics experiment that demonstrates action and reaction forces, stemming from Newton's Third Law of Motion. The bent straw directs the escaping air at a 45° angle, which in turn propels the balloon in the opposite direction, due to the conservation of momentum. This occurs because the air pressure inside the balloon acts against the opening of the straw, forcing the air out at an angle, while the balloon reacts by moving in the opposite direction of the escaping air. If the balloon were filled with water, the propulsion would still occur in a similar manner; however, the motion might differ slightly because of the difference in mass and the way water exits the balloon.