Unit 3 - Energy Flashcards
What is Mechanical Work?
In science, mechanical work is done when a force displaces an object
Is there such things as positive and negative work?
Yes, negative work is done when it opposes the work that is being done (like friction)
How do you graph work on a position-time graph?
The amount of work done is the area of the shape
What is Kinetic Energy?
the amount of energy that is possessed by moving objects
What is the Work-Energy Principle?
the amount of work that is done on an object is equal to it’s change in energy
What is Gravitational Potential Energy?
the energy that is stored in on object due to it’s position on Earth
What is Thermal Energy?
the total amount of motion of the particles in a substance
What is the Law of Conservation of Energy?
energy cannot be created or destroyed, it is simply absorbed or distributed
What is Energy Efficiency
the amount of useful energy produced in contrast to the total amount of energy that is put into the system
What is Nuclear Fission vs. Nuclear Fusion?
Nuclear Fission is making the nuclei of an atom smaller, Nuclear Fusion is making two nuclei into a larger nucleus
What is Power?
the rate at which energy is transformed
What is Temperature vs. Thermal Energy
Thermal energy is the total amount of energy (kinetic and potential), temperature is the average amount of kinetic energy in particles
What is the Kinetic Molecular Theory?
states that all particles in a substance are in motion, it relates temperature of a substance to the magnitude of particle motion
What is Conduction?
thermal energy transfer through direct contact, moving particle bump into each other
What is Convection?
thermal energy transfer through a convection current