RVFM Drinking Bird
Description
RVFM-Drinking-Bird-RVFM-PH20065-P-A-classic-toy-that-is-really-a-heat-engine-P-P-The-bird-demonstrates-the-cooling-effect-caused-by-evaporation-of-water-on-its-beak-The-cooling-causes-a-volatile-liquid-in-the-bird-s-body-to-condense-then-evaporate-again-as-it-warms-up-constantly-changing-the-balance-of-the-bird-s-body-P-RVFM-Drinking-Bird
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