Chapter 3: Energy

Chapter 3: EnergyWhat are some types of energy?Brainstorm about a type of energy as a groupDefine this type of energyWhere does it come from?How do we use it?What are some common examples?

Elastic EnergyEnergy stored in an object due to its compression or extension

Electrical EnergyEnergy resulting from the ordered movement of electrons from one atom to another

Thermal EnergyEnergy resulting from the random motion of all particles in a substance

Radiation EnergyEnergy contained in and transported by electromagnetic waves

Radiation EnergyEnergy contained in andtransported by electromagnetic waves

Chemical EnergyEnergy stored in molecular bonds

Sound energyEnergy contained in and transported in sound waves

Hydraulic energyEnergy resulting from the flow of water

Nuclear energyEnergy stored in atomic nuclei

What energy is involved in each image?

The Law of Conservation of EnergyEnergy can be neither created nor destroyed; it can only be transferred or transformed.The total amount of energy in an isolated system always remains constant.How do we define energy?

How do we define energy?Energy can cause changeWhat is going on in these pictures?

Energy can be used to do workHow do we define energy?Energy is the ability to do work orcause changeHow do we measure energy?Energy has two componentsForce (Newtons)Distance (meters)Energy = 1 joule = 1 N x 1 m

How do we measure energy?

kWh = kilowatt hour1 kWh = 3 600 000 J