Final answer:
In the context of a screen door with a spring, there is an energy transformation from mechanical to elastic energy when the door is opened and stretched. When Gabriella heats soup in the microwave, there are energy transformations from electrical to thermal energy and from thermal to kinetic energy.
Step-by-step explanation:
Spring on the Screen Door:
In event (1), when Elijah opens the door and stretches the spring, there is an energy transformation from mechanical to elastic energy. This is because the mechanical work done by Elijah in stretching the spring is stored as potential energy in the elastic material of the spring.
In event (2), when Elijah walks through the doorway, there is no energy transformation. The door remains in a kinetic state due to the motion imparted by the stretching of the spring.
In event (3), when Elijah lets go of the door and the spring contracts, there is an energy transformation from elastic to mechanical energy. The potential energy stored in the spring is converted into the kinetic energy of the door as it closes.
Heating Soup in the Microwave:
There are two energy transformations that occur when Gabriella heats a bowl of soup in the microwave. First, there is a transformation from electrical energy to thermal energy as the electrical energy from the microwave is absorbed by the soup, causing its temperature to rise. Second, there is a transformation from thermal energy to kinetic energy as the increased temperature of the soup causes the water molecules to move faster, resulting in the soup becoming hotter.
Learn more about Energy transformations in various scenarios