Conservation of energy
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transferred or transformed.
Which form of energy does not involve motion?
Gravitational potential energy
Which of the following is an example of potential energy?
A compressed spring
What happens to potential energy when it is converted to kinetic energy?
It decreases
Which law of thermodynamics is associated with the conservation of energy?
First law
In a closed system, if energy is transferred out, what happens to the total energy of the system?
It remains the same
What type of energy is associated with the motion of molecules?
Kinetic energy
Which of the following is an example of kinetic energy?
A swinging pendulum
What happens to the total energy of a system as it interacts with its surroundings?
It remains the same
Which of the following devices converts electrical energy into mechanical energy?
Electric fan