Energy Stores and Transfers

Flashcards covering key concepts related to energy stores, transformations, and principles of physics.

Energy Stores

Chemical, Kinetic, Gravitational, Elastic, Thermal, Magnetic, Electrostatic, Nuclear.

Conservation of Energy

Energy cannot be created or destroyed, only transformed from one form to another; the total amount of energy in a closed system remains constant.

Mechanical Energy Transfer

Energy transferred by forces.

Electrical Energy Transfer

Energy transferred through current flow.

Energy Transfer by Heating

Energy transferred through conduction, convection, or radiation.

Energy Transfer by Radiation

Energy transferred through light and sound.

Wasted Energy

Energy that is not used for its intended purpose; e.g., sound energy produced by a kettle not used for heating.

GPE (Gravitational Potential Energy)

Energy possessed by an object due to its height above the ground.

Kinetic Energy (KE)

Energy an object possesses due to its motion.

Power in Physics

The rate at which energy is transferred; work done (energy transferred) per unit of time.

Convection Currents

Movement within fluids where heated parts rise and cooler, denser parts sink.

Thermal Conductivity

The ability of a material to conduct heat; higher thermal conductivity means easier heat escape.

Energy Transfer Relationships

Work Done = Energy Transferred.

Change in Gravitational Potential Energy Equation

∆GPE = m x g x ∆h, where m is mass, g is gravitational field strength, and ∆h is change in height.

Kinetic Energy Equation

KE = ½mv², where m is mass and v is velocity.

What is the conservation of energy?

Energy cannot be created or destroyed, only transformed from one form to another; the total amount of energy in a closed system remains constant.

What does GPE stand for?

Gravitational Potential Energy.

What is the equation for kinetic energy?

KE = ½mv², where m is mass and v is velocity.

Mechanical Energy Transfer

Energy transferred by forces.

What is wasted energy?

Energy that is not used for its intended purpose; e.g., sound energy produced by a kettle not used for heating.

Convection Currents

Movement within fluids where heated parts rise and cooler, denser parts sink.

Power in Physics

The rate at which energy is transferred; work done (energy transferred) per unit of time.

What is thermal conductivity?

The ability of a material to conduct heat; higher thermal conductivity means easier heat escape.