IB Physics Glossary
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is used to show how the reaction force, between a person standing in an elevator and the floor of the elevator, varies with up/down acceleration of the elevator:
Note, the actual weight of the person does not change but an increase or decrease in the reaction force produces a change on the weighing scale in elevator.
or electromotive force, is the total energy supplied by a cell/battery per unit charge as it flows through the cell/battery. (d)
is the ratio of power emitted (per unit area) by a body to the power emitted (per unit area) by a black body of the same dimensions at the same temperature
the ratio of power emitted by a body to the power emitted if it were a black body. (d)
is the energy liberated per unit mass of fuel consumed. Its unit is Jkg-1.(d)
is a system property that expresses the degree of disorder in the system.
is the position where a particle would remain at rest if not disturbed. (d)
occur when the total kinetic energy of a system increases.