Energy Types and Transformations

Front

What is the definition of electrical energy?

Back

Electrical energy is the energy derived from electric potential energy or kinetic energy of charged particles, typically used to power devices and appliances.

Front

What device transforms electrical energy into mechanical energy?

Back

A fan is an example of a device that transforms electrical energy into mechanical energy.

Front

Describe the energy transformation that occurs when water falls through a dam and turns a turbine.

Back

The energy transformation is mechanical energy (from falling water) to electrical energy (generated by the turbine) to light energy (used in homes and offices).

Front

What is chemical energy?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, like atoms and molecules, which can be released during a chemical reaction.

Front

What happens to chemical energy when wood burns in a campfire?

Back

Chemical energy from the wood is converted into light energy and heat energy.

Front

Define kinetic energy.

Back

Kinetic energy is the energy of an object due to its motion, which depends on the mass and velocity of the object.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object based on its position or state, such as gravitational potential energy or elastic potential energy.

Front

How is kinetic energy related to potential energy?

Back

Kinetic energy can be transferred to potential energy, such as when an object is lifted against gravity, increasing its potential energy.

Front

What is the energy conversion process in a clothes dryer?

Back

The energy conversion in a clothes dryer is from electrical energy to thermal energy (heat), motion (to tumble the clothes), and sound energy.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object, which is used to do work.