symmetry 159 Taylor JH 128 tesla unit 146 Thomson JJ 202 Index cathode ray

# Symmetry 159 taylor jh 128 tesla unit 146 thomson jj

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symmetry, 159 Taylor, J.H., 128 tesla (unit), 146 Thomson, J.J. 202 Index
cathode ray experiments, 31 time constant RC, 177 transformer, 175 transformer-SHARED, 152 volt (unit) defined, 83 voltage defined, 84 related to electric field, 132 waves electromagnetic, 153 gravitational, 128 weak nuclear force, 60, 159 Index 203
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Useful Data Metric Prefixes M- mega- 10 6 k- kilo- 10 3 m- milli- 10 - 3 μ - (Greek mu) micro- 10 - 6 n- nano- 10 - 9 p- pico- 10 - 12 f- femto- 10 - 15 (Centi-, 10 - 2 , is used only in the centimeter.) Notation and Units quantity unit symbol distance meter, m x , Δ x time second, s t , Δ t mass kilogram, kg m density kg / m 3 ρ velocity m/s v acceleration m / s 2 a force N = kg · m / s 2 F pressure Pa=1 N / m 2 P energy J = kg · m 2 / s 2 E power W = 1 J / s P momentum kg · m / s p period s T wavelength m λ frequency s - 1 or Hz f charge coulomb, C q voltage volt, 1 V = 1 J/C V current ampere, 1 A = 1 C/s I resistance ohm, 1 Ω = 1 V/A R capacitance farad, 1 F = 1 C/V C inductance henry, 1 H = 1 V · s / A L electric field V/m or N/C E magnetic field tesla, 1 T = 1 N · s / C · m B Fundamental Constants gravitational constant G = 6.67 × 10 - 11 N · m 2 / kg 2 Coulomb constant k = 8.99 × 10 9 N · m 2 / C 2 quantum of charge e = 1.60 × 10 - 19 C speed of light c = 3.00 × 10 8 m/s Conversions Nonmetric units in terms of metric ones: 1 inch = 25.4 mm (by definition) 1 pound-force = 4.5 newtons of force (1 kg) · g = 2.2 pounds-force 1 scientific calorie = 4.18 J 1 kcal = 4.18 × 10 3 J 1 gallon = 3.78 × 10 3 cm 3 1 horsepower = 746 W When speaking of food energy, the word “Calorie” is used to mean 1 kcal, i.e., 1000 calories. In writing, the capital C may be used to indicate 1 Calorie=1000 calories. Relationships among U.S. units: 1 foot (ft) = 12 inches 1 yard (yd) = 3 feet 1 mile (mi) = 5280 feet Earth, Moon, and Sun body mass (kg) radius (km) radius of orbit (km) earth 5.97 × 10 24 6.4 × 10 3 1.49 × 10 8 moon 7.35 × 10 22 1.7 × 10 3 3.84 × 10 5 sun 1.99 × 10 30 7.0 × 10 5 Subatomic Particles particle mass (kg) radius (fm) electron 9.109 × 10 - 31 0.01 proton 1.673 × 10 - 27 1.1 neutron 1.675 × 10 - 27 1.1 The radii of protons and neutrons can only be given approx- imately, since they have fuzzy surfaces. For comparison, a typical atom is about a million fm in radius. 210 Index

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