Physics 9702 A2 Level Definitions

Absolute Zero - correct answer-The theoretical temperature at which the molecules of a substance have the lowest energy and hence the substance has minimum internal energy and no kinetic energy acoustic impedance - correct answer-product of density of medium and speed of sound in medium Activity - correct answer-The number of atoms of a radioactive substance that decay per unit time. amplitude modulation - correct answer-amplitude of carrier wave varies in synchrony with the displacement of the information signal Analogue signal - correct answer-data varies continuously with time and can have any value between two limits Angular Velocity - correct answer-the rate of change of angular displacement with respect to time swept out by the radius Attenuation - correct answer-gradual reduction or loss in signal power or energy Avogadro constant - correct answer-number of atoms of carbon-12 in 0.012 kg of carbon-12 Bandwidth - correct answer-the range of frequencies that can be amplified by the same amount of an operational amplifier Binding Energy - correct answer-The amount of energy needed to split a nucleus completely into its individual nucleons. Binding Energy per Nucleon - correct answer-Binding energy divided by the mass or nucleon number of the nucleus. capacitance - correct answer-ratio of charge on body and its potential Centripetal Acceleration - correct answer-Acceleration which is always perpendicular to the velocity and alway