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### Energy

• Energy is the ability to do work or to cause change.
• Potential energy is stored energy or energy of position.
• Mechanical (elastic) potential energy, is energy stored in an object by tension, like a spring or a rubber band.
• Chemical potential energy is energy stored in chemical bonds.
• Nuclear energy is the energy stored in the nucleus of an atom.
• Gravitational potential energy is energy stored in an object’s height. (GPE = mgh)
• Kinetic energy is energy of motion.
• Thermal energy is energy of heat, or energy from the movement of atoms or molecules.
• Radiant energy is the energy of waves
• Electrical energy is the energy of electrons moving through a wire.
• Sound energy is the energy in the compressional waves of sound
• Motion – energy of objects in motion
• Law of conservation of energy: energy cannot be created nor destroyed, only transformed.
• Energy resources used to generate electrical energy are either nonrenewable (fossil fuels, nuclear) or renewable (solar, wind, geothermal, hydropower, biomass)
• Most electricity generating plants use energy to turn a turbine, which is attached to a generator that generates electricity.

### Energy

What type of energy is called the energy of movement of particles in an object or the object itself?
Kinetic Energy
What type of energy is stored energy?
Potential Energy
If you drop a penny from a balcony on the second floor, the gravitational potential energy before you drop the penny will be equal to the kinetic energy of the penny just before it hits the ground (ignore the effect of friction for this problem). This is an example of what law?
Law of conservation of energy — the GPE is not lost, but transformed into KE
What are the four types of potential energy
Gravitational, Nuclear, Chemical, Elastic (Mechanical)
Light, x-rays, microwaves, infrared waves and gamma waves are all examples of what type of energy?
When you warm up your hands by rubbing them together, what energy transformation is taking place?
Kinetic energy of your moving hands transforms into thermal energy due to friction.
What do we generate from our renewable and nonrenewable resources?
Electrical energy
What are the three types of fossil fuels?
Natural gas, coal, and oil
How is thermal energy used in the process of generating electrical energy?
Thermal energy is used to create steam to turn a turbine.
Thermal, radiant, and electrical are all types of what type of energy?
Kinetic Energy

*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.

### Energy

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Energy 0:03
• Energy Overview
• Potential Energy 1:48
• Potential Energy
• Mechanical (Elastic) Potential Energy
• Chemical Potential Energy
• Nuclear Energy
• Gravitational Potential Energy
• Kinetic Energy 7:34
• Kinetic Energy
• Thermal Energy
• Electrical Energy
• Sound
• Motion
• Kinetic Energy: Example
• Law of Conservation of Energy 12:47
• Law of Conservation of Energy
• Chemical to Thermal
• Potential to Kinetic
• Friction
• Energy Resources 20:06
• Nonrenewable: Fossil Fuels
• Nonrenewable: Nuclear
• Renewable: Solar
• Renewable: Wind
• Renewable: Tidal
• Renewable: Hydroelectric
• Renewable: Geothermal
• Example 1: Gravitational Potential Energy 38:40
• Example 2: Kinetic Energy 42:20
• Example 3: Maximum and Minimum Potential and Kinetic Energy 44:48
• Example 4: Should We Use Renewable or Nonrenewable Resources to Generate Electricity? 46:31