What does kW mean? - Kilowatts or 1000 W, What is 5 mSv in Sv - 0.005 Sv, Value of the angle of refraction at the critical angle. - 90 degrees, All EM waves are what type of wave? - Transverse waves., Speed of all EM waves - 3x10⁸ m s⁻¹, Write the equation linking equivalent dose, absorbed dose and weighting factor - H=DwR, Give a method of reducing your equivalent dose - Increasing distance from source, adding shielding to source, reducing time of exposure, What must be done when calculating equivalent doses from different sources. - Individual calculations must be done as each radiation will do different amounts of damage., Particles are arranged regularly in a ….? - solid, Particles are arranged randomly, but touching in a …? - liquid, Particles move around randomly in a ….? - gas, State the equation which links acceleration, mass and unbalanced force - F = ma, What is the unit of weight? - Newtons (N), What is the unit of mass? - kilograms (kg), Why are spectra useful - They can show astronomers elements present in stellar objects.,

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