Physical Science Ch.15
Example of thermal energy
Fire
Examples of Nuclear energy
Fission and fussion
Example of elastic potential
Rubber band
What is energy
The ability to do work
Elastic potential
The potential energy of an object that is stretched or compressed
How are work and energy related
You can have energy and not have work
Formula for kinetic energy
1/2MV^2
Gravity
9.8 m^2
On example of electromagnetic energy is
A falling oyster
And example of the conversion of gravitational potential energy into kinetic energy is
A falling raindrop
Electromagnetic energy
A form of energy that travels through space in forms of waves
An example of an object having elastic potential energy is
A stretched spring
Example of energy conversion
Apple in a tree, Flashlight, Sterio
Example of potential and gravitational potential energy
Apple on the tree
Energy stored in the bonds between Atoms is called
Chemical energy
Flashlight
Chemical>electric>electromagnetic>thermal energy
What happens to atoms when they are cold and hot
Cold= Slower Hot=Faster
Sterio
Electric>mechanical>sound
Electrical energy
Energy associated with electric charges
Mechanical energy
Energy associated with motion and position of every day objects
Law of conservation
Energy can't be created or destroyed
The law of conservation of energy states that
Energy cannot be created or destroyed
Kinetic energy
Energy of motion
Chemical energy
Energy stored in chemical bonds
Renewable resources
Energy that can be replaced in a short period of time
Nuclear energy
Energy that is located in a atoms nucleus
Potential energy and gravitational potential energy
Energy that is stored as a result of position or shape
Albert Einstein's equation
Energy= mass(speed of light)^2 E=MV^2
Example of kinetic energy
Falling leaf
Fission and fission defs
Fission= atoms split apart: nuclear weapon Fission= 2 atoms nuclei join together: the sun
Examples of NRR
Fossil Fuels=Nat.Gas, petroleum,coal Nuclear Fuels=uranium,plutonium
What energy resource accounts for most of the worlds present energy use
Fossil fuel's
What is the source of geothermal energy
From earth
Example of chemical energy
Fuel
Examples of RR
Hydroelectric, solar, wind, geothermal
Everytime a chemical bond _ ____, energy is ___
Is broken , released
Work
Is energy
How does the potential energy of an object change when it's height is tripled
It triples too
What is energy measured in
Joules
The energy of a moving object is
Kinetic energy
What is the difference between kinetic and potential energy
Kinetic equals energy is moving, potential equals energy is stored
What are the four types of energy
Kinetic, potential, gravitational potential, elastic potential
Example of electrical energy is
Lightning
Non-renewable resources
Limited quantities of energy that can't be replaced
Is mechanical energy always conserved? Explain why or why not
Mechanical energy is never conserved because friction is always there
The six forms of energy
Mechanical, thermal, chemical, electrical, electromagnetic, and nuclear
example of mechanical energy
Moving train
Formula for potential energy
PE= MGH, Mass(gravity)(height)
Energy conversions
Potential energy changes to kinetic energy
Explain the energy conversions that occur as a basketball Falls, hits the ground, and bounces back up. Ignore frictional forces
Potential to kinetic to friction/sound/elastic
Apple in a tree
Potential>kinetic>friction>bouncing>sound
If the speed of an object doubles, it's kinetic energy...
Quadruples
Why/ how creation of energy occurred
Something
Thermal energy
The amount of movement in the particles of an object
Mechanical energy is
The sum of the kinetic and potential energy of an object
Most renewable energy originates from
The sun
What happens to the atoms of an object if it's thermal energy is increased
They move faster
Why are cool, oil, and natural gas considered to be non-renewable energy resources
They take too long to renew it
Solar
Use solar power to make electricity
Hydroelectric
Use water moving to make electricity
Geothermal
Uses heat beneath earths surface
Wind
Uses turbines to move when wind blows
Example of electromagnetic energy
X-Ray, Sun
