Index
engineering (cont.)
    design     19
    engineering method     19
    of ErgoBot     195
English system
    of units     42
entropy
    and absolute zero     734
    definition of     731
    the meaning of entropy     733
equal loudness curve         444
equation
    AC voltages from a transformer     559
    acceleration components     182
    acceleration on an inclined plane     192
    acceleration vector     182
    angular velocity     206
    as a model     56
    Bernoulli’s equation     678
    centripetal acceleration     209
    centripetal force     209
    charge in a capacitor     536
    conservation of energy in an open system     290
    Coulomb’s law     524
    density     677
    Doppler effect     446
    efficiency of a simple machine     341
    elastic collision     321
    energy change in a closed system     290
    equilibrium of forces     234
    Faraday’s law of induction     557
    fluid resistance     157
    for acceleration     106
    for angular momentum     367
    for electric power     264
    for gravitational potential energy     257
    for kinetic energy     256
    for momentum     306
    for power     263
    for the electric field     530
    for torque     236
    for weight     133
    for work     255
    force components     170
    force equilibrium     138
    force on moving charge in a magnetic field     561
    frequency and period     390
    heat conduction     706
    heat convection     710
    Hooke’s law     147
    hydrostatic pressure     677
    ideal gas law     675
    impulse     308
    inclined plane with friction     194
    inverse square law for light intensity     581
    kinetic (sliding) friction     154
equation (cont.)
    mass–energy equivalence     793
    mechanical advantage     333
    mechanical advantage of a ramp     345
    moment of inertia     365
    momentum conservation in collisions     319
    Newton’s second law     141
    Ohm’s law     480
    orbit equation     216
    position in accelerated motion     113
    position velocity and time     83
    power in electric circuit     494
    pressure     673
    projectile motion     185
    Pythagorean theorem     173
    quadratic     118
    resistance in a parallel circuit     490
    resistance in a series circuit     488
    rolling friction     156
    rotational equilibrium     238
    rotational kinetic energy     376
    Snell’s law of refraction     608
    speed of a wave     413
    speed of sound     445
    static friction     153
    Stefan–Boltzmann equation     715
    thermal energy     670
    thin lens formula     617
    trigonometric functions     171
    uncertainty principle     777
    universal law of gravitation     214
    velocity in accelerated motion     112
    velocity vector     179
    voltage drop     487
    work–energy theorem     287
equations
    consistency in units     90
    definition of     18
equilibrium
    definition of     138
    equation for forces     138
    forces equation     234
equipotential lines         534
equivalence principle, of general relativity         221
ErgoBot
    and friction blocks     295
    design of     195
    graphing acceleration     111
    graphing distance and speed     6
    how wheels work     6
    modeling effects of force on     144
    motion down inclined plane     190
    navigating a maze     178
    work and energy     260
error         15
escape velocity         223
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