    Mac OS X            	   2                                             ATTR        `  b                 `   a  /com.apple.metadata:kMDItemKeyphraseConfidences          *com.apple.metadata:kMDItemKeyphraseLabels      k   +  +com.apple.metadata:kMDItemKeyphraseVersion        ,  .com.apple.metadata:kMDItemTextContentLanguage    bplist00#?eE8#?<u#?]U#?L #?g    )2                            ;bplist00_terms of basic physics concepts_several qualitative aspects_frequency of light^speed of light_include details0Ncr                            bplist00                            
bplist00Ren                            