resistance, Ratio of the potential difference, V across the conductor to the current, I flowing through it., specific heat capacity, The amount of heat transferred to change the temperature of one kg of material by 1ºC or 1 K., impulse, change in momentum, energy, capacity to do work, work, product of force and displacement in the direction of force, power, the rate at which work is done, elasticity, the property of an object that enables it to return to its original shape and dimensions when an applied force is removed, specific latent heat, amount of heat required to change the phase of 1 kg of the substance at a constant temperature, amplitude, maximum displacement from its equilibrium position, period, time taken to complete an oscillation, diffraction, a phenomenon in which waves spread out as they pass through an aperture or round a small obstacle , interference, superposition of two waves originating from two coherent sources, electric field, a region within which electric force acts on a particle with an electric charge, electromotive force, a work done by a source in driving 1 coulomb of charge around a complete circuit, carbon dating, method use to determine the age of artefacts in the field of archaeology, transverse wave, a wave in which the vibration of particles in the medium is at right angles to the direction of the propagation of the wave, frequency, the number of complete oscillations made by a vibrating system in one second, wavelength, distance between two successive points one the same phase in a wave, electron gun, an assembly of cathode and anode in a vacuum tube to produce beam of fast moving electrons, radioactivity , the spontaneous disintegration of an unstable nucleus into a more stable nucleus with emission of energetic particles or photons.

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