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Volume displacement demonstration measurement. Archimedes principle. Hand fingers water buoyant force. Transparent glass flask. How to measure. Homework educational experiment. Illustration vector
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Student scientist writing physics equation on a book to solve a science or math problem in a classroom lab with a blackboard behind. Theory learning in university. Albert Einstein theory concept.
A scientist or university professor of science is using a virtual chalk board to teach or study energy and speed of light, magnetic field direction, chemical reactions and micro life.
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