PHSICS EAR 11 FORMULAE AND DATA - School Curriculum …

1 PHYSICS. YEAR 11. FORMULAE AND data . Copyright School Curriculum and Standards Authority, 2014. This document apart from any third party copyright material contained in it may be freely copied, or communicated on an intranet, for non-commercial purposes in educational institutions, provided that it is not changed and that the School Curriculum and Standards Authority is acknowledged as the copyright owner. Copying or communication for any other purpose can be done only within the terms of the Copyright Act or with prior written permission of the Authority. Copying or communication of any third party copyright material can be done only within the terms of the Copyright Act or with permission of the copyright owners.

2 2016/6432 Physics Year 11 FORMULAE and data updated February 2016. Physics YEAR 11 2 FORMULAE and data Linear motion and force s v+u Mean velocity vav = t =. 2. v u Equations of motion a = t ; s = ut + at 2 ; v2 = u2 + 2as ; v = u + at Force F = ma Weight force F = mg Momentum p = mv ; pbefore = pafter Change in momentum (impulse) p = F t = mv mu Kinetic energy Ek = mv2. Gravitational potential energy Ep = mg h Work done W = Fs = E. W E. Power P = t = t = Fvav Note: the variable t refers to the 'time taken' sometimes referred to as the 'change in time' or t. Ionising radiation and nuclear reactions N. Activity A= t Half-life 1. N = N0 2 ( ) n E. Absorbed radiation dose absorbed dose = m Dose equivalent dose equivalent = absorbed dose quality factor Mass-energy relationship E = mc 2.

3 Heating processes Change of temperature Q = mc T. Change of state Q = mL. Efficiency energy output 100. = %. energy input 1. Electrical circuits q Electric current I=. t W. Work and energy V= q V. Ohm's law R= I. Resistances in series RT = R1 + R2 + .. 1 = 1 + 1 + .. Resistances in parallel RT R1 R2. W. Power P = t = VI. See next page FORMULAE and data 3 Physics YEAR 11. Waves Wave velocity v=f . 1. Period T= f 2 . Strings and open pipes = n 4 . Closed pipes = (2n 1). 1. Intensity I . r2. Prefixes of the metric system Factor Prefix Symbol Factor Prefix Symbol 1012 tera T 10-3 milli m 109 giga G 10-6 micro . 106 mega M 10-9 nano n 103 kilo k 10-12 pico p See next page Physics YEAR 11 4 FORMULAE and data Physical constants Speed of light in vacuum or c = 108 m s-1.

4 Electron e = 10-19 C. Electron 1 eV = 10-19 J. Unified atomic mass 1 u = 10-27 kg Rest mass of me = 10-31 kg Rest mass of mp = 10-27 kg Rest mass of mn = 10-27 kg Rest mass of alpha m = 10-27 kg Mass energy 1 u = 931 MeV. 1 t = 103 kg = 106 g Absolute 0 K = 273 C. Physical data Mean acceleration due to gravity on g = m s-2. Specific heat capacity of cw = 103 J K-1 kg-1. Specific heat capacity of ci = 103 J K-1 kg-1. Specific heat capacity of cs = 103 J K-1 kg-1. Latent heat of fusion for Lf = 105 J kg-1. Latent heat of vaporisation for Lv = 106 J kg-1. Speed of sound in air at 25 vs = 346 m s-1. Quality factors Approximate quality factor for alpha QF = 20. Approximate quality factor for beta QF = 1.

5 Approximate quality factor for gamma QF = 1. Approximate quality factor for slow QFsn = 3. Approximate quality factor for fast QFfn = 10. See next page FORMULAE and data 5. See next page Physics YEAR 11. [ data source: The International Union of Pure and Applied Chemistry Periodic Table of the Elements (May 2013)].