Final answer:
When a balloon with a straw bent at a 45° angle is released, the balloon is propelled in the opposite direction of the escaping air, demonstrating Newton's Third Law of Motion. Similarly, blowing between two strips of paper illustrates Bernoulli's Principle as the strips move towards each other due to pressure differences.
Step-by-step explanation:
The student's question involves a demonstration of Newton's Third Law of Motion which states that for every action, there is an equal and opposite reaction. When a balloon is blown up and then released without tying it, air rushes out of the balloon in one direction, and the balloon itself propels in the opposite direction. If you were to bend the straw to a 45° angle, the air would escape at that angle, and the balloon would be propelled in the opposite direction of the escaping air, also at a 45° angle, due to the action-reaction force pair.
In a similar take-home experiment mentioned, where two strips of paper illustrate Bernoulli's Principle, blowing between them causes the paper strips to move towards each other. This is because the fast-moving air creates a zone of lower pressure between the paper strips, and the higher pressure from the surrounding air pushes the strips together.
Regarding the propulsion of a balloon in the Propulsion of a Balloon experiment, when a balloon filled with air or water is released, the direction of the balloon’s movement will be opposite to the direction of the expelled air or water. The principle behind this effect does not change whether the balloon is filled with air or water.