In a wind turbine system that charges a large battery bank, what is the initial energy source in the chain of energy?

The electrical energy stored in the battery bank.

The kinetic energy of the moving air (wind).

The mechanical rotation of the turbine blades.

The generator that produces the electricity.

A solar-powered calculator uses light to perform mathematical operations. If the calculator is placed in a dark room, which part of its energy chain is first interrupted?

The receiver (the display screen)

The mechanism (the internal circuits)

To calculate the total amount of energy created in the system.

To map the complete sequence of energy transformations from the source to the receiver.

To determine the efficiency of the energy source by itself.

To measure the temperature change in the mechanism of interaction.

The bicycle's dynamo (generator)