Energy Recap and Transfers

Practice flashcards covering the Law of Conservation of Energy, various energy stores (Elastic, Chemical, Kinetic, Thermal, Magnetic, Electrostatic, Gravitational Potential, and Nuclear), and methods of energy transfer (Electrical, Mechanical, Radiation, and Heating).

What is the Law of Conservation of Energy?

Energy can not be created or destroyed, only stored and transferred.

What are the four types of energy transfers mentioned in the notes?

Mechanical, electrical, radiation, and heating.

Define the Elastic Store.

Energy stored when an object has been squashed or stretched, such as a balloon or a springy object.

What is the Chemical Store?

Energy stored in the bonds of a substance that can react, for example, the energy in a burger.

Define the Kinetic Store.

Energy stored in a moving object, such as a car.

What characterizes the Thermal Store?

It is the total energy of the particles that make up an object; the higher the temperature of the object, the more energy in this store.

What occurs in the Magnetic Store?

Energy is stored when repelling poles are pushed closer or when attracting poles are pushed further apart, causing magnets to spring apart.

Define the Electrostatic Store.

Energy stored when repelling charges have been pushed closer or when attracting charges have been pulled apart.

What is Gravitational Potential energy?

Energy stored when an object is lifted up in a gravitational potential field, such as a book on a table.

Define the Nuclear Store.

Energy stored in the nucleus of an atom, for example, in a bomb.

When does electrical work occur?

When charge flows, for example, in a battery torch.

Define mechanical work as an energy transfer.

When a force is applied to move an object, such as a Newton's cradle.

How is energy transferred via radiation?

Energy is transferred as a wave, such as light or sound (e.g., radiators or speakers).

When does energy transfer through heating occur?

When energy is transferred between hotter and colder regions, such as when lighting a candle.

What are the energy transfers and outputs associated with a Lightbulb?

Electrical transfer results in light and thermal energy.

What are the energy transfers and outputs associated with a Matchstrick?

Chemical transfer results in thermal, light, and sound energy.