G485 Definitions Prioritised 0.0 / 5 PhysicsAllA2/A-levelOCR Created by: MaddieCreated on: 18-05-15 10:39 force per unit charge electric field strength 1 of 19 flux density normal to the plane of the area x cross sectional area magnetic flux 2 of 19 charge per unit potential difference capacitance 3 of 19 momentum, mass-energy, charge, proton number, baryon number, nucleon number quantities conserved 4 of 19 the night sky should have uniform brightness, the line of sight ends on the surface of a star olbers paradox 5 of 19 infinite, uniformly distributed matter throughout, static, infinite age cosmological principle 6 of 19 speed of a galaxy is proportional to its distance hubbles law 7 of 19 coulomb per volt farad 8 of 19 energy transferred to eletrical energy per unit charge emf 9 of 19 density for which the universe will expand towards a limit or rate of expansion tends to zero which will result in a flat universe critical density 10 of 19 the force between 2 charges is proportional to the product of the charges and inversely proportional to the square of the distance between the charges coulombs law 11 of 19 a measure of the stength of the magnetic field, measured in tesla magnetic flux density 12 of 19 the number of radioactive decays per unit time activity 13 of 19 the energy required to seperate an atom into its component parts binding energy 14 of 19 the probability of radioactive decay decay constant 15 of 19 focussing an electromagnetic wave to provide a parallel beam collimation 16 of 19 the property of a material that determines the intensity of ultrasound refracted at a boundary with another material acoustic impedance 17 of 19 the frequency of precession of a proton in a maggnetic field larmor frequency 18 of 19 the time taken for the charge remaining on a capacitor to fall to e‾¹ of its original value time constant 19 of 19

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