Final answer:
Covering a panini tray with a plastic bag helps prevent freezer burn by creating an air-tight seal. Bernoulli's principle explains why a plastic bag can fly out of a car window, as lowering the window decreases the pressure inside the car. Lightweight and moldable plastic materials are useful in many applications due to their protective properties.
Step-by-step explanation:
Covering a panini tray with a plastic bag can be related to the practice of minimizing freezer burn by wrapping food tightly before freezing. Freezer burn occurs when air reaches the food's surface and causes dehydration and oxidation. By wrapping items tightly with plastic, it effectively keeps air away, minimizing the chances of freezer burn.
Similarly, plastic materials like packaging peanuts and CD cases serve various purposes from providing protection during shipping to storing items securely. Their lightweight, moldable properties make them useful in many applications.
When the window of a moving car is lowered, a phenomenon concerning air pressure and airflow called Bernoulli's principle may cause a plastic bag inside the car to be drawn out. The principle states that as the speed of a moving fluid, in this case, air, increases, the pressure within the fluid decreases. This can result in lower pressure inside the car as compared to outside, and if an empty plastic bag is caught in this flow.