Index
crank, on a bicycle         352
crest of a wave         418
critical angle         609
CRT (cathode ray tube)         567
crystalline silicon         28
Cugnot, Nicolas Joseph—first car         726
Curie, Marie         798
Curiosity, Mars rover         225
current
    electric     264
    safe current in different wire gauges     500
curvature of spacetime         222
cushioning to reduce impact force         308
cyan         23
cycle         388
cyclotron radius         562

D
da Vinci, Leonardo         726
Daimler, Gottlieb         726
Dali, Salvador         2
Dalton, John         752
damping         392
DARPA grand challenge         166
DC (direct current)         499
de Broglie, Louis         761
deceleration         106
    and negative acceleration     109
decibel scale         444
deformation
    of a spring     147
degrees of freedom         683
Democritus, and the atom         752
density
    common substances     43
    definition of     43
    of a fluid     677
    of gold     50
dependent variable         12
    on a graph     55
depletion region, in p-n junction         688
derailleur         330
derived quantities         38
design process         242
destructive interference         426
diagram
    circuit diagram     473
diamagnetism         517
diffraction
    grating     637
    of light through a double slit     647
    of light through a single slit     646
    of waves     422
diffuse reflection         585
digital
    cameras     652
digital (cont.)
    images     23
    multimeter     474
dimensions
    of physical quantity     39
dinosaurs
    impact theory of extinction     16
diode         688
dipole         511
direct current (DC)         499
direct measurement         49
discovery of the nucleus         754
dispersion
    and rainbows     639
    definition of     637
displacement         70
    adding and subtracting 1D     72
    vector     176
    vector model for     176
dissonance         456
distance         70
    area on velocity vs. time graph     81
distribution function         682
diverging lens         612
diving and center of mass         372
Doppler effect         446
    interactive simulation     447
Doppler velocity         219
dose, in radiation measurement         813
double pane glass windows         708
double slit experiment
    for electrons     774
    for light (Young’s experiment)     647
drag coefficient         157
driverless vehicles         166
DSP (digital signal processing)         463
dynamic problems         142

E
E (electric field)         527
Earth
    convection on     712
    cycles of orbit, rotation, weather     388
    energy balance     696
    magnetic field     515
    magnetic field interactive simulation     516
    population     267
    precession of orbit     380
    rotation and revolution     364
earthquakes         410
echoes         455
eclipse         580
Eddington, Sir Arthur         222
Edison, Thomas A.         499
efficiency
    Carnot cycle     743
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