Physics 17 Exam 3 Equation Sheet Water: c = 1.0 cal/g-Co Ice: c = 0.5 cal/g-Co Steam: c = 0.5 cal/g-Co Latent Heat of Fusion: 80 cal/gram Latent Heat of Vaporization: 540 cal/gram Freezing Point: 0 Co Boiling Point: 100 Co Q = mcT Q1 + Q2 = 0 (Mixture Equation) Kelvin Temperature = Celsius Temperature + 273 Fahrenheit Temperature = (9/5) Celsius Temperature + 32 R = eAT4, where = 5.67 x 10-8 W/(m2-T4) PV = NkT, where k = 1.38 x 10-23 J/K The atomic weight of a substance, in grams, equals one mole. 22.4 liters per mole Avogadro’s Number: NA = 6.02 x 1023 atoms (or molecules) per mole R = kA T/x, where k = thermal conductivity F = kQ1Q2/r2, where k = 9 x 109 N-m2/C2 I = V/R V = IR P = I2R (power consumed) P = IV (power output of a power supply) R = R1 + R2 (series connection) R = R1R2/(R1+R2) parallel connection (for two resistors) 1/R = 1/R1 + 1/R2 + 1/R3 + …. (parallel connection of three or more resistors) If the current through a resistance R is I, the effect is the same as if a battery whose voltage is V = IR were connected to it. F = QvB Use “right-hand-rule” to determine the direction of the magnetic force on a moving charge. Magetic Flux: = BA Faraday’s Law: V = t Transformer Equation: V2 = (N1/N2) V1

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