Index
principal quantum number n         763
prism         584
    light dispersal by     21
problem solving
    initial assumptions     89
    multiple equations     88
    steps     58
projectile
    definition of     184
projectile motion         184
    equations for     185
    interactive simulation     186
    problems     189
    velocity vectors     187
promotional claims
    science in     25
propagation of waves         413
proton         752
proton–proton cycle fusion reaction         807
prototype         19
Ptolemy         220
pulleys
    as simple machine     338
    block and tackle     340
    investigations with     339
PV diagram         738
Pythagorean theorem         173

Q
q (electric charge)         524
quadratic equation         118
    acceleration     118
quantitative
    definition of     18
quantization         761
quantum number         761
    n, l, m, s     770
quantum physics         9
    and photons     649
quantum spacetime         778
quantum states         769
quantum tunneling         780
quarks         753

R
R (ideal gas constant)         675
RADAR         446
radial vector         209
radian
    converting to degrees     173
    definition of     206
radiation
    heat transfer     702
radiation therapy         813
radiative energy balance of Earth         718
radio communication         654
radio telescope         620
radio waves         641
radioactive decay         798
    alpha     799
    beta     799
    gamma     799
radioactivity         798
radiometer
    Crooke's     775
radiometric dating         802
radius of curvature
    of spherical mirror     596
radius of curves on a road         211
rainbow         21
    double     639
    explanation for     639
ramp (see also inclined plane)
    motion along     191
  
ramp coordinates         192
random motion         681
range
    of a projectile     184
ratio of specific heats γ         741
ray diagram
    for a lens     615
ray tracing         590
    interactive simulation for convex lens     616
    rules for lenses     615
reaction forces         145
    concept of     235
    in structures     244
real image         614
recycling         296
redshift         93
reference frame         85
    and energy     258
reflected ray         590
reflection
    of light     585
    of waves     420
refraction         585
    of waves     421
    Snell’s law     608
refrigerator         745
regenerative braking         546
    in hybrid cars     568
Reines, Frederick         800
relationships
    in problem solving     58
    on a graph     56
relativity         91
    twin paradox     36
rem, unit of dose         813
renewable energy         353
repeatability         12
resistance
    electrical, definition of     480
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