# Physics 105

 velocity distance travelled divided by time of travel Fundamental SI units Length      Mass             Time          meter (m) kilogram (kg) second (s) Electric Current: ampere (A) Electric Charge measured in coulombs, C 1C = 1 A⋅s Kinetic Energy (KE) energy of motion Potential Energy (PE) stored energy that can be converted to kinetic energy ΔPEgrav=ΔKE charge q or Q Electric Potential or Potential measured in volts, V1V = 1 J/C Potential Difference Voltage difference in potential between 2 points Current   (I) flow of charge measured in ampere, A 1A = 1 C/s Circuit closed loop that current can flow around Ohm's Law current is proprtional to voltage V = IR V=Voltage, I=current, R=resistance Resistance   (R) Measured in ohm, Ω 1Ω = 1 V/A smaller the resistance, more easily current flows Resistivity (R) measured in Ω⋅m changes with temperature p(T) = resistivity at temperature Tp0 = resistivity at some reference temperature, T0 (usually 20 °C)α is the temperature coefficient of resistivity, usually has units of (°C)-1 Power the rate at which energy is transferred 1W = 1 J/s Power (P)        P = IV P = I2R Authorufvlu ID313996 Card SetPhysics 105 Description1.2: Physical Quantities and Units 1.3: Accuracy, Precision and Sig Figs 18.1: Electric Charge 19.1: Electric Potential Energy: Potential Difference Updated2016-01-18T21:14:44Z Show Answers