The ability to do work or cause change
The rate at which work is done
How are power and energy related?
Power is the rate at which energy is transferred
How are work and energy related?
Work is the transfer of energy.
What are the two main types of energy?
Kinetic and Potential
The energy an object has due to its motion.
What two factors affect Kinetic energy?
mass and speed
energy that results from the position or shape on an object
What type of potential energy is related to an object's height?
How do you find the gravitational potential energy?
weight x height
Elastic potential energy has to do with what?
Mechanical Energy associates with what?
an object's motion, position or shape
How do you calculate mechanical energy?
Add together the object's kinetic and potential energy
An object with mechanical energy can do __________ on another object
Other forms of energy dealing with the object's particles are
nuclear energy, thermal energy, electrical energy, electromagnetic energy, and chemical energy
Nuclear Energy is stored in an
Nuclear energy energy happens during two types of nuclear reactions. What are they?
Nuclear fission and nuclear fusion
Nuclear fusion happens when
atoms join together - occur constantly in the sun
nuclear fission happens when
the nucleus splits in half - nuclear fission in a power plant creates electricity
What type of energy has particles constantly in motion? The total kinetic and potential energy of the particles are this type of energy. It creates heat.
The higher the temperature the ________________ thermal energy it has.
the more thermal energy it has
Electrical energy is
the energy of electrical charges. - getting shocked when touching a door knob - lightening - batteries - electrical lines
electromagnetic energy (also radiant energy) is a form of energy that travels through space in ___________________
waves (vibrating electric charges) - UV rays from the sun, x-rays, microwaves, infrared (heat) waves and radio waves. Cell phones send and receive messages using microwaves
Chemical energy is in ______________, _______________ and ___________.
food, matches, and body cells
All forms of energy can be ________________________ into other forms of energy. A change from one form of energy to another is call an ___________________ _________________.
There are two types of transformations, single and multiple. Give an example of each.
single - toaster transforms electrical energy to thermal energy to toast your bread. cell phone transforms electrical energy to electromagnetic energy that travels to other phones or your body transforms chemical energy in food to the mechanical energy you need to move your muscles
multiple - book pg 53
Law of conservation of energy states
when one form of energy is transformed to another, no energy is lost in the process.
Energy cannot be created near destroyed