What is the law of conservation of energy - Energy cannot be created or destroyed, onyx transferred between objects and transformed between types, In an Elastic Collision Kinetic energy is - conserved, What is the equation used for the horizontal component of projectile motion - Displacement = Velocity x time (since horizontal velocity is constant), Define l' (special relativity) - length measured in a frame of reference moving relative to the one containing the object (e.g. rod), Define Quark: - Small Particles - Protons and Neutrons made of these, Define Hadron: - From Heavy Particle - Particles mad of quarks, Define Voltage in relation to Work Done - There is a P.D,. Of 1V between 2 points if 1J of energy is required to move 1C of charge., What equation relates the velocity of an electron to its charge and the potential difference across a point? - QV=1/2mv^2, Define Fission - Nucleus is split, Energy is released., Define Fusion - Multiple Nuclei fuse together, mass is lost, Energy Released., what property of a wave remains constant in any transparent material? - frequency, what is an application of Total Internal Reflection? - Fibreoptics, what are Fraunhofer lines - dark lines in emission spectra from sun, what does laser stand for - light amplification by stimulated emission of eradiation, why is the photoelectric effect not proof for the wave model of light? - changing brightness does nothing. , What is the work function of a metal? - Minimum Energy which must be supplied to enable an Electron to escape from the surface., How can you determine frequency on an oscilloscope - count boxes, and check the time base to work period then us T=1/f, How can you determine amplitude on an oscilloscope - count boxes, and check the volts/div, How do we draw internal resistance on a circuit - Resistor in series with a Cell - directly next to, what are lost volts? - the p.d. 'lost' because of internal resistance of a cell, Sketch the V/T graph for a discharging capacitor - Teacher to draw on board (⦦), Describe an n-type semiconductor - in terms of electrons - e.g.Silcone doped with arsenic - an extra electron - Electron is free to move - Lowers resistance. Free charge carrier is -'ve charge, Describe an n-type semiconductor - in terms of band structure - Extra electrons close to conduction band - easily exited to Conduction band. Fermi level closer to conduction band,

Higher Revision Roulette 6

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