# Physics 2

 Thermal expansion L = original lengthT = temperature Volume expansion for liquids Internal energy of a system Work done by the system = positiveWork done on the system = negative Heat flow into the system = positiveHeat flow out of system = negative Heat of transformation - phase changes Q = mL L = heat of transformation of a system Work done on the system P = pressureconstant volume means no work Energy Spontaneity - entropy Reversible precess:  L = either heat of fusion or vaporization Coulomb's law Magnitude of electrostatic force between two charges  Electric field - produced by an electric charge qo = test chargeF = force felt by test chargeunits: N/C Electrical potential Energy Electric potential volts = J/C Tesla, gauss Tesla = Ns/mC gauss = 10-4 tesla Current units: C/s = ampere Magnetic field at center of current carrying loop   units: tesla Magnetic Field force v= velocity θ= angle between qv and B Max when θ=90 : qvBZero when θ=0 Right hand rule thumb - velocityfingers - magnetic fieldpalm - force Orbit radius of a charge set centripatal force equal to magnetic forceqvB=mv2/2 Magnetic field of uniform circular motion velocity of a uniform circular motion Magnetic force on a current carrying wire i = currentL = length Resistance units: ΩL = lengthA = cross sectional area Ohm's law Voltage drop V = iR Power of a resistor P = iV V = voltage drop across resistor Power lost during transmission, dissapated by resistor P = i2R P = V2/R Voltage drop across resistors in series Current through all resistors is equal to current of total resistance.Voltage drop across each resistor will be different. - use current to calculate it Vs are the voltage drop across each resistorVT is the voltage coming out of the battery. Total resistance of resistors in series Voltage drop across resistors in parallel Voltage drop across each path is the same, but current is split up. More current goes through resistor of least resistance. Total resistance of resistors in parallel capacitance units: farad = c/V capacitance with two plates A = area of overlapd = distance between plates Electric field in a capacitor direction of field is away from positive plate. Potential energy of a capacitor Dielectrics - change capacitance C' = kC C'= new capacitanceC=original capacitance Electromotive force ε voltage across terminals of battery when there is no charge flowing Authormisbah ID220482 Card SetPhysics 2 Description.. Updated2013-05-22T03:45:14Z Show Answers