Chapter 5 Energy and Energy Resources

1 / 19

# Chapter 5 Energy and Energy Resources - PowerPoint PPT Presentation

Chapter 5 Energy and Energy Resources. Section 1 What is Energy? Section 2 Energy Conversions Section 3 Conservation of Energy Section 4 Energy Resources. Section 1 What is Energy. Right. Energy and Work: Working Together Energy is the ability to do work Kinetic Energy

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Chapter 5 Energy and Energy Resources' - kamana

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### Chapter 5Energy and Energy Resources

Section 1 What is Energy?

Section 2 Energy Conversions

Section 3 Conservation of Energy

Section 4 Energy Resources

Section 1 What is Energy

Right

• Energy and Work: Working Together
• Energy is the ability to do work
• Kinetic Energy
• The energy of motion

Kinetic energy = mv2

2

• Example:
• What is the kinetic energy of a car with a mass of 3000 kg traveling at 30 m/s?

Right

• Potential Energy
• Energy an object has because of position
• Gravitational Potential Energy (GPE)
• The energy of an object’s mass and height above the ground
• GPE is at a maximum at the top
• If you are on a trampoline, your GPE is at a max at the top of your jump

GPE = weight x height

• Example Problem
• What is the GPE of a 640 N diver standing on a platform 4 m high?

Right

• Mechanical Energy
• The total energy of motion and position of an object
• Juggling a pin
• A baseball falling through the air

Mechanical energy = potential energy+ kinetic energy

• Example problem
• A pin being juggled has a potential energy of 20 J and a kinetic energy of 600 J, what is the pin’s mechanical energy?
Other Energy Forms

Right

• Thermal
• Due to random motion of particles
• Any time an energy conversion occurs, some of the original energy converts to thermal, Ex: A hairdryer
• Chemical
• Comes from a compound that changes as its atoms are rearranged, Ex: Energy in food
• Electrical
• Energy of moving electrons, Ex: An amplifier and microphone
• Sound
• Caused by an objects vibrations, Ex: stretch a guitar string
• Light
• Produced by the vibrations of electrically charged particles
• Nuclear
• The energy that comes from the nucleus of an atom
Mini Book Construction

Left

• Title:
• Chapter 5 Energy and Energy Resources
• On the tabs:
• Types of Energy
• Energy Conversions
• Conservation of Energy
• Energy Resources
Section 2: Energy Conversions

Right

• Energy Conversion
• Change from one form of energy to the other
• Elastic Potential Energy
• The type of energy a rubber band has when you wind it on a toy airplane
• The energy you put into stretching the rubber band
Mini Book Construction
• Tab: Energy Conversions
• Define energy conversion, pg. 132
• Define Elastic potential energy
• Give 2 examples of each:
• Conversions in Chemical Energy, pg 133
• Conversions in Electrical Energy
• What is the role of energy conversions in Machines? Give an example machine that converts and what does it do? (pg 137)
Section 3: Conservation of Energy

Right

• The Law of Conservation of Energy
• After energy conversions, you end up with the same total amount of energy as the original amount of potential energy
• Energy before = Energy after
Mini Book Construction
• Tab: Conservation of Energy, page 138
• ____ is a force that opposes motion between two surfaces that are in contact.
• The law of conservation of energy states that ….
• Give 2 examples of how thermal energy is always a result of energy conversion.
• Perpetual motion is impossible because ….
Section 4: Energy Resources

Right

• Nonrenewable resources cannot be replaced or are replaced more slowly than they are used up
• Fossil Fuels: oil, natural gas, coal; formed by the buried remains of plants and animals from millions of years ago
Everyday uses of Some Fossil Fuels

Right

• The US primary source of electrical energy is generated by burning fossil fuels
• Fossil fuels are energy resources from buried remains of plants and animals that lived millions of years ago.
• Fossil Fuels contain stored energy from the sun.
• Concentrated forms of the sun’s energy
Converting Fossil Fuels into Electrical Energy

Left

• An electric generator converts energy of one type into another - Electric Company - Electricity

petroleum

Mini Book Construction
• Tab: Energy Resources, page
• Create a table – Advantages and Disadvantages of Energy Resources (list one of each, Fossil Fuel-Biomass)

Non Renewable Resources

Renewable Resources

Ex. 1

Ex. 2

Ex. 3

Ex. 1

Ex. 2

Ex. 3