Chapter 4 Energy Flashcards
State the Law of the conservation of energy.
Energy can be neither created nor destroyed, only changed in form.
Name 8 common forms of energy.
- Gravitational Potential Energy
- Kinetic energy
- Electromagnetic energy
- Chemical Potential Energy
- Electrical Energy
- Thermal Energy
- Elastic Potential Energy
- Nuclear Energy
Define Energy
One of the basic costituents of the universe, the other being matter and intelligence.
Define gravitational potential energy.
Energy of an object posesses because it has been lifted in a gravitational field.
Give the equation calculating gravitational potential energy.
Eg = m g h
where
Eg is gravitational potential energy in Joules (J)
m is mass in kg
g is the acceleration of gravity =9.80 m/s2
h is height in meters
Define kinetic energy.
The energy an object possesses because it in motion.
Give the equation to calculate kinetic energy
Ek=1/2 m v^2
Ek is Kinetic Energy in Joules (J)
m is mass in kg
v is velocity in m/s
Define Chemical Potential Energy
The energy stored in the chemical bonds of molecules.
Define Electrical Energy
The enrgy flowing in electrical conductors.
Define thermal energy.
Energy a substance possesses due to be heated.
Define Elastic Potential Energy.
The energy contained in an object that has been stretched or compressed.
Define Nuclear Energy.
The energy released from the nuclear processes of fission or fusion.
Define Acoustic Energy.
The energy carried in sound waves. A special type of kinetic energy.
Define Work.
Work is the mechanical process by which energy is transferred from one object to another.
Name the equation for work.
W = F d
Where
W is work in J
F is F in N
d is distance in meters
