CIA 3 review flashcard

Front

What is the transformation of energy from electrical to mechanical to sound?

Back

This process involves converting electrical energy (from a power source) into mechanical energy (movement) and then into sound energy (noise produced by the movement). An example is a pencil sharpener that uses electrical energy to rotate a blade, creating sound as it sharpens a pencil.

Front

At which point is potential energy greatest in a vertical motion?

Back

Potential energy is greatest at the highest point of an object's trajectory, where it has maximum height and minimum kinetic energy.

Front

What happens to a ball's potential energy as it is hit into the air?

Back

At its highest point, the ball has maximum potential energy. Right before it hits the ground, it has minimum potential energy.

Front

What type of energy is solar energy transferred to?

Back

Solar energy is transferred to electrical energy when it is converted using solar panels.

Front

What occurs when opposite poles of magnets are placed together?

Back

The force will pull them together (attract).

Front

Define potential energy.

Back

Potential energy is the energy stored in an object due to its position or state. It is the energy an object has because of its height above the ground.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the speed at which it is moving.

Front

Explain the law of conservation of energy.

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the difference between renewable and non-renewable energy sources?

Back

Renewable energy sources can be replenished naturally (like solar, wind, and hydro), while non-renewable sources (like coal, oil, and natural gas) are finite and will eventually run out.

Front

What is an example of energy transformation in a flashlight?

Back

In a flashlight, chemical energy from batteries is transformed into electrical energy, which is then converted into light energy.