Readings in the Physical Sciences, Volume 1Harlow Shapley, Helen Wright, Samuel Berder Rapport |
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actually amount appear applied astronomers atoms become body called carbon cause century chemical Company complete compounds contained course determined direction discovered discovery distance earth effect electric electrons elements energy engine evidence existence experiment fact field followed force give glass greater heat human idea important increase interest kind knowledge known land lead less light living mass material mathematical matter means measure metal method million mind molecules motion moving nature observed occur organic origin pass period phenomena physical planets positive possible practical present problems produced properties proved radiation reaction reason relation result scientific seems separation space speed stars structure substances surface temperature theory things thought tion true units University uranium waves weight whole York