Physics Autumn 2023/24 Flashcards
1.1 List the eight ways energy can be stored by objects.
Kinetic, gravitational potential, elastic, chemical potential, thermal, nuclear, electrostatic and magnetic.
1.2 List the four ways energy can be transferred by objects.
Mechanical, heating, radiation and electrical.
1.3 Define the term energy.
Energy is the ability to do work.
1.4 State the unit we use to measure work done.
Joules (J).
1.5 Define the term dissipated energy.
When energy is transferred into the surroundings.
1.6 Describe what is meant by the efficiency of an object.
How much of the total input energy is transferred usefully by the object.
1.7 State the name of the energy transfer that takes place when a force acts on an object.
Mechanical transfer.
1.8 State the three ways thermal energy can be transferred by heating.
Conduction, convection, infrared radiation.
1.9 State the direction that thermal energy always moves.
From hot to cold objects.
1.1 Describe the energy transfer pathway that takes place in a circuit.
Chemical potential store in the cell → electrical transfer by the current → energy store of the component.
1.11 State the two types of radiation transfer.
Light radiation and sound radiation.
1.1 Describe the difference between a longitudinal and a transverse wave.
In a longitudinal waves, the oscillations are parallel to the direction of the energy transfer. In transverse waves, the oscillations are perpendicular to the direction of the energy transfer.
1.2 Describe the difference between an electromagnetic and a mechanical wave.
A mechanical wave is one that transfers energy through vibrating particles in matter. An electromagnetic wave is one that does not need particles to travel so it can travel through a vacuum.
1.3 Define the term wavelength.
The length of one wave - the distance from peak to peak.
1.4 Define the term frequency.
The number of waves that pass a point in one second.
