Lesson 4 pg118
All forms of energy can be transformed into other forms of ___________
Energy
Energy an object has due to its motion, shape, position, or combination of all factors
MEchanical energy
transfer of energy into the thermal energy of an object is called ______
heat
This type of energy can be stored in rubber bands, elastic objects etc
elastic potential energy
___________ is the rate at which work is done
Power
A pendulum demonstrates the relationship between what two energies?
Kinetic and potential energy
Formula for calculating mechanical energy
ME = PE + KE
Energy used to power devices, lights and is a type of kinetic energy
Electrical energy
What is gravitational potential energy?
related to an object's vertical position-how high it is above the ground
a Push or Pull
Force
What is law of conservation of energy
When one object loses energy, other objects must gain it
What is nuclear energy
type of potential energy stored in the nucleus
When bonds are broken, energy is released in what type of energy?
chemical energy
Formula for finding KE
KE = 1/2 x Mass x Speed2
The ability to do work or cause change
Energy
What three energy transformations does your body use when eating toast?
chemical, kinetic, mechanical
small nuclei combine to form larger nuclei
Fusion
When water is put into the freezer, the kinetic energy ________ and thermal energy and temperature ____________
decreases/decreases
Kinetic energy of an object depends on two factors
speed and mass
Formula for calculating power
Power = work
Time
When does energy transformation occur?
occurs when one form of energy changes into another
A nucleus splits into smaller fragments
Fission
Energy that doesn't require a medium.
What is a medium
Electromagnetic radiation
air, water
Weight x Height above ground =
Gravitational Potential energy
The unit for power
The unit for work
Watt (W)
Joule (J)