Energy Types
What type of energy increases as an object gets warmer?
Thermal Energy
The kinetic energy of a 30-kg boat floating downriver at a speed of 2 m/s
60 J
The conservation of energy states what?
Energy cannot be created or destroyed
Nuclear power plants convert _______ energy to _______ energy
Nuclear energy to electrical energy.
Energy is what?
The ability to do work.
What type of energy is stored in gasoline?
Chemical energy
The kinetic energy of a 12-kg sled moving at 3 m/s
54 J
Explain how energy is conserved during a roller coaster ride
Potential energy is converted to kinetic energy and vice versa.
Solar energy converts what energy to electrical energy?
Thermal energy to electrical energy.
Gravitational potential energy is directly related to what three things?
Mass, gravity, and height.
What is the energy associated with the nucleus of an atom?
Nuclear energy
The potential energy of a 4-kg cat sitting on a bookshelf 3m high
117.6 J
Energy cannot be created or destroyed, but it can do what?
Be converted.
Hydroelectric power converts what energy to electrical energy?
Kinetic energy of water to electrical energy.
What is one example of elastic potential energy?
Stretching a rubber band, plucking a guitar string, etc.
What is the energy involved with waves?
Electromagnetic energy
The amount of energy needed for a 7.7-kg animal to jump 1.1 m
83 J
What is one way we can conserve energy?
Using renewable resources, mass transportation, efficient items, etc.
Explain the conversion of energy in a pendulum
Potential energy is highest at max height; kinetic energy is highest at lowest point.
Name a nonrenewable energy resource
Fossil fuels (coal, oil, petroleum) and uranium.
What is the total potential and kinetic energy of microscopic particles?
Thermal energy
What is the mathematical formula to prove the conservation of energy?
(KE+PE)beginning = (KE + PE)end
If two identical balls are dropped from a height of 5 m on the moon and on Earth, which has less gravitational potential energy?
The one on the moon, due to lower gravity.
If two identical balls are dropped from a height of 5 m on the moon and on Earth, which has less gravitational potential energy?
The one on the moon, due to lower gravity.
What is the byproduct of a hydrogen fuel cell?
Water