Pitch drop experiment
Long-term experiment measuring the flow of pitch
Pitch drop experiment
A pitch drop experiment is a long-term experiment which measures the flow of a piece of pitch over many years. "Pitch" is the name for any of a number of highly viscous liquids which appear solid, most commonly bitumen, also known as asphalt. At room temperature, tar pitch flows at a very low rate, taking several years to form a single drop.
Read on Wikipedia · Image University_of_Queensland_Pitch_drop_experiment.jpg: John Mainstone derivative work: Amada44, CC BY-SA 3.0
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